WO2023173848A1 - Ensemble lentille, système d'imagerie optique, module de caméra et dispositif électronique - Google Patents

Ensemble lentille, système d'imagerie optique, module de caméra et dispositif électronique Download PDF

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Publication number
WO2023173848A1
WO2023173848A1 PCT/CN2022/138786 CN2022138786W WO2023173848A1 WO 2023173848 A1 WO2023173848 A1 WO 2023173848A1 CN 2022138786 W CN2022138786 W CN 2022138786W WO 2023173848 A1 WO2023173848 A1 WO 2023173848A1
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WIPO (PCT)
Prior art keywords
driving component
layer
flexible layer
electric field
lens assembly
Prior art date
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PCT/CN2022/138786
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English (en)
Chinese (zh)
Inventor
董富伟
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Oppo广东移动通信有限公司
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Publication of WO2023173848A1 publication Critical patent/WO2023173848A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles

Definitions

  • This application relates to the field of electronics, specifically to a lens assembly, an optical imaging system, a camera module and an electronic device.
  • the first embodiment of the present application provides a lens assembly, which includes:
  • a load-bearing layer has a first surface, and the first surface is a curved surface;
  • a zoom layer, the zoom layer is disposed on the first surface of the bearing layer
  • the flexible layer is disposed on the side of the zoom layer away from the bearing layer;
  • An actuator the actuator is carried on the flexible layer, and the actuator is used to drive the flexible layer to deform, thereby driving the zoom layer to elastically deform, so as to achieve a change in the focal length of the lens assembly.
  • the second embodiment of the present application provides an optical imaging system, which includes: the lens assembly described in the embodiment of the present application, the optical imaging system has an object side, and the flexible layer of the lens assembly is larger than the lens assembly. The zoom layer is closer to the object side of the optical imaging system.
  • the third embodiment of the present application provides a camera module, which includes:
  • Photosensitive element the photosensitive element is located on the image side of the optical imaging system.
  • the fourth embodiment of the present application provides an electronic device, which includes:
  • the camera module described in the embodiment of this application is used to capture images
  • a display module for displaying images captured by the camera module
  • the circuit board module is electrically connected to the camera module and the display module respectively, and is used to control the camera module for shooting and to control the display module for display.
  • Figure 1 is a schematic structural diagram of a lens assembly according to an embodiment of the present application.
  • FIG. 2 is a schematic cross-sectional structural view of a lens assembly along the direction A-A in FIG. 1 according to an embodiment of the present application.
  • FIG. 3 is a schematic cross-sectional structural view of a lens assembly according to another embodiment of the present application along the direction A-A in FIG. 1 .
  • Figure 4 is a schematic structural diagram of the first driving component or the second driving component according to an embodiment of the present application.
  • FIG. 5 is a schematic cross-sectional structural view of the first driving component or the second driving component along the B-B direction in FIG. 4 according to an embodiment of the present application.
  • FIG. 6 is a schematic cross-sectional structural view of a lens assembly according to another embodiment of the present application along the direction A-A in FIG. 1 .
  • FIG. 7 is a schematic cross-sectional structural view of a lens assembly according to another embodiment of the present application along the direction A-A in FIG. 1 .
  • FIG. 8 is a schematic cross-sectional structural view along the direction A-A in FIG. 1 when the lens assembly according to an embodiment of the present application is in the first state.
  • FIG. 9 is a schematic cross-sectional structural view along the direction A-A in FIG. 1 when the lens assembly according to an embodiment of the present application is in the second state.
  • FIG. 10 is a schematic cross-sectional structural view along the direction A-A in FIG. 1 when the lens assembly according to an embodiment of the present application is in the third state.
  • FIG. 11 is a schematic cross-sectional structural view along the direction A-A in FIG. 1 when the lens assembly according to an embodiment of the present application is in the fourth state.
  • FIG. 12 is a schematic cross-sectional structural view of a lens assembly according to another embodiment of the present application along the direction A-A in FIG. 1 .
  • FIG. 13 is a schematic cross-sectional structural view of a lens assembly according to another embodiment of the present application along the direction A-A in FIG. 1 .
  • FIG. 14 is a schematic cross-sectional structural view of a lens assembly according to another embodiment of the present application along the direction A-A in FIG. 1 .
  • Figure 15 is a schematic structural diagram of an optical imaging system according to an embodiment of the present application.
  • Figure 16 is a schematic structural diagram of an optical imaging system according to another embodiment of the present application.
  • Figure 17 is a schematic structural diagram of an optical imaging system according to another embodiment of the present application.
  • Figure 18 is a schematic structural diagram of an optical imaging system according to another embodiment of the present application.
  • Figure 19 is a schematic structural diagram of a camera module according to an embodiment of the present application.
  • Figure 20 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
  • Figure 21 is a schematic diagram of a partially exploded structure of an electronic device according to an embodiment of the present application.
  • Figure 22 is a circuit block diagram of an electronic device according to an embodiment of the present application.
  • Figure 23 is a circuit block diagram of an electronic device according to yet another embodiment of the present application.
  • 100-lens assembly 101-accommodating space, 10-carrying layer, 11-first surface, 30-zoom layer, 50-flexible layer, 51-second surface, 70-actuator, 71-first driving component, 711-first electrode, 713-actuation layer, 715-second electrode, 73-second driving component, 90-support, 200-optical imaging system, 210-non-zoom lens, 230-diaphragm, 250-infrared Cut-off filter, 270-protective film, 300-camera module, 310-photosensitive element, 331-accommodating cavity, 400-electronic equipment, 410-display module, 420-middle frame, 430-circuit board module, 431-processor, 433-memory, 450-casing, 451-transparent part.
  • this application provides a lens assembly, which includes:
  • a load-bearing layer has a first surface, and the first surface is a curved surface;
  • a zoom layer, the zoom layer is disposed on the first surface of the bearing layer
  • the flexible layer is disposed on the side of the zoom layer away from the bearing layer;
  • An actuator the actuator is carried on the flexible layer, and the actuator is used to drive the flexible layer to deform, thereby driving the zoom layer to elastically deform, so as to achieve a change in the focal length of the lens assembly.
  • the lens assembly has an optical axis
  • the first surface is a convex surface or a concave surface at the optical axis
  • the first surface is a spherical surface, an aspherical surface or a free-form surface.
  • the first surface is a convex surface at the optical axis, and the curvature radius R1 of the first surface is in a range of 20mm ⁇ R1 ⁇ 300mm; or, the first surface is a concave surface at the optical axis, The curvature radius R1 of the first surface ranges from 1 mm ⁇ R1 ⁇ 300 mm.
  • the range of the focal length f of the lens assembly is -200mm ⁇ f ⁇ -5mm, or 2mm ⁇ f ⁇ 100mm.
  • the range of the clear aperture D of the lens assembly is 1.5mm ⁇ D ⁇ 7mm.
  • the actuator includes a first driving component and a second driving component.
  • the first driving component is disposed on a side of the flexible layer away from the zoom layer.
  • the second driving component is disposed on the flexible layer. The side of the layer facing the zoom layer, when at least one of the first driving component and the second driving component is loaded with a voltage, the flexible layer is driven to deform, thereby driving the zoom layer to elastically deform, To achieve the focal length change of the lens assembly.
  • the lens assembly has an optical axis
  • the flexible layer has a second surface away from the zoom layer
  • the flexible layer drives the The flexible layer deforms, thereby driving the zoom layer to elastically deform, so that the second surface is spherical or aspherical, and the second surface is convex or concave at the optical axis.
  • the first surface is a convex surface at the optical axis.
  • the second driving component applies a voltage to generate a second electric field
  • the second driving component The surface is spherical and protrudes in a direction away from the zoom layer; wherein the direction of the first electric field is from the side of the first driving component away from the flexible layer toward the first driving component close to the flexible layer
  • the direction of the second electric field is from the side of the second driving component away from the flexible layer to the side of the second driving component close to the flexible layer.
  • the first surface is a convex surface at the optical axis.
  • the second driving component applies a voltage to generate a fourth electric field
  • the surface is aspherical, and the second surface protrudes toward the direction away from the zoom layer at the optical axis; wherein the direction of the third electric field points from the side of the first driving component close to the flexible layer.
  • the direction of the fourth electric field is from the side of the second driving component facing away from the flexible layer to the side of the second driving component close to the flexible layer.
  • the first surface is a convex surface at the optical axis, and when neither the first driving component nor the second driving component is loaded with voltage, the lens component has a first focal length; when the first driving component When the driving component applies a voltage to generate a first electric field, and when the second driving component applies a voltage to generate a second electric field, the lens component has a second focal length; when the first driving component applies a voltage to a third electric field, the second driving component When a voltage is applied to the component 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.
  • the first surface is a concave surface at the optical axis.
  • the second driving component applies a voltage to generate a second electric field
  • the second driving component The surface is spherical, and the second surface is recessed toward the direction of the zoom layer at the optical axis; wherein the direction of the first electric field is directed from the side of the first driving component close to the flexible layer to the first The side of the driving component facing away from the flexible layer; the direction of the second electric field is from the side of the second driving component close to the flexible layer to the side of the second driving component facing away from the flexible layer.
  • the first surface is a concave surface at the optical axis.
  • the second driving component applies a voltage to generate a third electric field and the second driving component applies a voltage to generate a fourth electric field
  • the second driving component The surface is an aspherical surface, and the second surface is recessed toward the direction of the zoom layer at the optical axis; wherein the direction of the third electric field is directed from the side of the first driving component away from the flexible layer toward the third One driving component is close to the side of the flexible layer; the direction of the fourth electric field is from the side of the second driving component close to the flexible layer to the side of the second driving component away from the flexible layer.
  • the first surface is a concave surface at the optical axis, and when neither the first driving component nor the second driving component is loaded with voltage, the lens component has a first focal length; when the first driving component When the driving component applies a voltage to generate a first electric field, and when the second driving component applies a voltage to generate a second electric field, the lens component has a second focal length; when the first driving component applies a voltage to generate a third electric field, the second driving component generates a third electric field.
  • the lens component When the driving component is loaded with 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.
  • the second surface curvature radius R2 is in a range of 50mm ⁇ R2 ⁇ 100mm.
  • the first driving component is at least one of a piezoelectric driving component, an electrostrictive driving component, and a magnetostrictive driving component
  • the second driving component is a piezoelectric driving component, an electrostrictive driving component, or a magnetostrictive driving component. at least one of them.
  • first driving component and the second driving component are both annular structures, the first driving component and the second driving component are coaxially arranged, and the first driving component and the second driving component Orthographic projections of the driving assembly on the flexible layer at least partially overlap, and orthographic projections of the actuator on the flexible layer are arranged around the outer periphery of the orthographic projection of the zoom layer on the flexible layer.
  • the lens assembly further includes a support member, which is located on a side of the flexible layer facing the zoom layer and is arranged around the outer periphery of the zoom layer.
  • the support member is in contact with the flexible layer and At least one of the load-bearing layers is connected to support the flexible layer.
  • the load-bearing layer and the support member are both light-transmissive, and the load-bearing layer and the support member are an integrated structure.
  • this application provides an optical imaging system, which includes: the lens assembly described in the first aspect of this application, the optical imaging system has an object side, and the flexible layer of the lens assembly is larger than the The zoom layer is closer to the object side of the optical imaging system.
  • this application provides a camera module, which includes:
  • Photosensitive element the photosensitive element is located on the image side of the optical imaging system.
  • this application provides an electronic device, which includes:
  • the camera module described in the third aspect of this application is used to capture images
  • a display module for displaying images captured by the camera module
  • the circuit board module is electrically connected to the camera module and the display module respectively, and is used to control the camera module for shooting and to control the display module for display.
  • the embodiment of the present application provides a lens assembly 100, which can be applied to an optical imaging system 200 (as shown in Figures 15 and 16), such as cameras, camera phones, driving recorders, vehicle cameras, tablet computers, notebook computers, desktop computers, etc.
  • an optical imaging system 200 such as cameras, camera phones, driving recorders, vehicle cameras, tablet computers, notebook computers, desktop computers, etc.
  • electronic devices 400 shown in Figure 20 with camera functions such as computers, smart bracelets, smart watches, e-readers, smart glasses, security equipment, monitoring equipment, video doorbells, etc.
  • an embodiment of the present application provides a lens assembly 100 , which includes a bearing layer 10 , a zoom layer 30 , a flexible layer 50 and an actuator 70 .
  • the bearing layer 10 has 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 bearing layer 10; the flexible layer 50 is disposed on the 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 used to drive the flexible layer 50 to deform, thereby driving the zoom
  • the layer 30 undergoes elastic deformation to achieve a focal length change of the lens assembly 100 .
  • the first surface 11 is a curved surface. It can be 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.
  • the zoom layer 30 can be directly disposed on the first surface 11 and bonded to the first surface 11; it can also be The zoom layer 30 is disposed above the first surface 11.
  • Other light-transmitting parts such as optical glue (OCA glue), etc., can be disposed between the zoom layer 30 and the first surface 11.
  • OCA glue optical glue
  • the zoom layer 30 is adhered to the first surface 11 through the optical glue. on surface 11.
  • the flexible layer 50 is disposed on the side of the zoom layer 30 away from the load-bearing layer 10; the flexible layer 50 can be disposed close to the surface of the zoom layer 30 away from the load-bearing layer 10, directly connected to the zoom layer. 30 is bonded to the surface away from the carrier layer 10.
  • the flexible layer 50 and the zoom layer 30 may be spaced apart from the surface away from the carrier layer 10, and other light-transmitting parts, such as optical glue (OCA glue), etc., are also provided in the middle.
  • OCA glue optical glue
  • the flexible layer 50 is closer to the object side of the optical imaging system 200 than the zoom layer 30 .
  • the zoom layer 30 is closer to the optical imaging system 200 than the flexible layer 50 .
  • light (dashed arrows in Figures 2 and 3 ) is incident from the flexible layer 50 side of the lens assembly 100 , and passes through the flexible layer 50 , the zoom layer 30 and the load-bearing layer 10 in sequence, and is far away from the flexible layer when the load-bearing layer 10 50 emitted from one side, the light will be refracted when passing between each two adjacent layer structures.
  • the lens assembly 100 can converge the light to form a convex lens, or the lens assembly 100 can be controlled to have a divergent effect on the light to form a concave lens.
  • the actuator 70 is started, and the actuator 70 applies a compressive force or a tensile force to at least part of the flexible layer 50, so that under the action of the actuator 70 The bending occurs, thereby squeezing the zoom layer 30 , causing the zoom layer 30 to undergo elastic deformation, thereby changing the path of light propagation, and causing the focal length of the lens assembly 100 to change.
  • the flexible layer 50 can be deformed to varying degrees and in different forms, so that the zoom layer 30 can be deformed in the flexible layer. Under the action of 50, deformation occurs in different degrees and in different forms, thereby controlling the focal length of the lens assembly 100.
  • the lens assembly 100 of the embodiment of the present application carries the layer 10, the zoom layer 30, the flexible layer 50 and the actuator 70.
  • the carrier layer 10 has a first surface 11, and the first surface 11 is a curved surface, which enables the lens assembly 100 to have a certain concentrating effect or diverging effect on light when the actuator 70 is not activated, thereby having a certain Optical power, when the actuator 70 is turned on, 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, the first surface 11 is a curved surface, which can make the flexible layer 50 move away from the zoom layer
  • the surface of the layer 30 forms a larger curvature (ie, a smaller radius of curvature), so that by controlling the position, direction, size, etc.
  • the light-transmitting component can have a larger light intensity.
  • Focal power range thus having a large focal length variation range.
  • the structure and materials are the same, compared with the case where the first surface 11 is a plane, when the first surface 11 is a curved surface, it can bring about greater curvature, so that a larger focal length variation range can be obtained.
  • Lens assembly 100 with larger clear aperture when the structure and materials are the same, compared with the case where the first surface 11 is a plane, when the first surface 11 is a curved surface, it can bring about greater curvature, so that a larger focal length variation range can be obtained.
  • Lens assembly 100 with larger clear aperture when the structure and materials are the same, compared with the case where the first surface 11 is a plane, when the first surface 11 is a curved surface, it can bring about greater curvature, so that a larger focal length variation range can be obtained.
  • Lens assembly 100 with larger clear aperture when the structure and materials are the same, compared with the case where the first surface 11 is
  • optical power in this application describes the ability of an optical system to deflect light.
  • Optical power includes positive optical power and negative optical power.
  • clear aperture in this application refers to the diameter of the circular hole produced in the center of the lens by the variable aperture (blade group) when adjusting the aperture in a camera.
  • the lens assembly 100 has an optical axis, and the optical axis of the lens assembly 100 is shown by the dotted line O-O in FIG. 2 .
  • 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 the light beam (optical column), or the axis of symmetry of the optical system.
  • the focal length f of the lens assembly 100 is in the range of -200mm ⁇ f ⁇ -5mm, or 2mm ⁇ f ⁇ 100mm.
  • 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 of the present application can be changed between -200mm ⁇ f ⁇ -5mm, or 2mm ⁇ f ⁇ 100mm, which has a larger focal length variation range.
  • the lens assembly 100 of the present application When applied to a camera, it can have a larger focusing range. It can be suitable for shooting objects with different depths of field to better meet the needs of users.
  • the lens assembly 100 of the present application when applied to the optical imaging system 200, it can also be used for macro photography to obtain greater image magnification.
  • the shooting distance is less than 10cm, or the shooting distance is less than 5cm.
  • the clear aperture D of the lens assembly 100 is in a range of 1.5 mm ⁇ D ⁇ 7 mm. Further, the range of the clear aperture D of the lens assembly 100 is 3 mm ⁇ D ⁇ 7 mm. Furthermore, the range of the clear aperture D of the lens assembly 100 is 5 mm ⁇ D ⁇ 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, etc.
  • the structural composition of the lens assembly 100 of the present application makes it possible to obtain a lens assembly 100 with a smaller clear aperture and a lens assembly 100 with a larger clear aperture (for example, greater than 4 mm or greater than 6 mm, etc.). In addition, when preparing a camera with a larger clear aperture, the focal length of the lens assembly 100 will not be reduced.
  • the carrier layer 10 is light-transmissive.
  • the material of the bearing layer 10 may be, but is not limited to, at least one of polycarbonate (PC), polymethylmethacrylate (PMMA), and glass. It can be understood that the bearing layer 10 has a certain rigidity to provide sufficient support. The rigidity of the bearing layer 10 at least prevents the shape of the first surface 11 from changing when the zoom layer 30 is extruded and elastically deformed.
  • the bearing layer 10 can be formed by molding, injection molding, etc., to obtain the first surface 11 of a predetermined shape.
  • the carrier layer 10 can also form the first surface 11 with a preset shape by using physical vapor deposition (PVD) or chemical vapor deposition (CVD) or other process methods on a planar structure.
  • the first surface 11 may be a spherical surface, an aspherical surface or a free-form surface.
  • the first surface 11 may be a convex surface or a concave surface. It can be understood that when the first surface 11 is a convex surface, the first surface 11 protrudes toward the direction closer to the zoom layer 30 ; when the first surface 11 is a concave surface, the first surface 11 is recessed toward a direction away from the zoom layer 30 .
  • more types of lens components 100 can be obtained, such as convex lenses with a condensing function and concave lenses with a diverging function.
  • aspheric surface in this application refers to a rotationally symmetric aspheric surface.
  • freeform surface in this application refers to an aspheric surface that is not rotationally symmetrical.
  • 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 aspherical surface or a free-form surface.
  • the aspheric surface may satisfy but is not limited to satisfying the following relationship:
  • z is the distance height from the aspherical surface to the aspherical surface's vertex (the vertex refers to the intersection of the aspherical surface and the optical axis) when the aspherical surface is at a height r along the optical axis
  • r is the distance from a point on the aspherical surface to the aspherical surface's vertex.
  • c is the curvature of the aspheric surface
  • k is the cone coefficient
  • A is the fourth-order correction coefficient of the aspheric surface
  • B is the sixth-order correction coefficient of the aspheric surface
  • C is the eighth-order correction coefficient of the aspheric surface
  • D is the The 10th-order correction coefficient of the spherical surface
  • E is the 12th-order correction coefficient of the aspheric surface
  • F is the 14th-order correction coefficient of the aspheric surface
  • G is the 16th-order correction coefficient of the aspheric surface
  • H is the 18th-order correction coefficient of the aspheric surface.
  • Coefficient, J is the 20th order correction coefficient of the aspheric surface.
  • the free-form surface may satisfy, but is not limited to, the following relationship:
  • z is the height of the distance from a point of height r along the optical axis on the free surface to the vertex of the free surface (the intersection of the point on the free surface and the optical axis), and r is the distance from the point on the free surface to the vertex of the aspheric surface.
  • distance c is the curvature of the free surface
  • k is the cone coefficient
  • ZP j is the j-th Zernike polynomial
  • C j is the coefficient of ZP j
  • j is an integer from 1 to 21.
  • the 1st to 21st expressions of polynomial ZP j are shown in Table 1 below.
  • the first surface 11 is convex at the optical axis and concave near the circumference (as shown in Figure 2); in other embodiments, the first surface 11 is both convex at the optical axis and near the circumference. is convex. In some embodiments, the first surface 11 is concave at the optical axis and convex near the circumference (as shown in FIG. 3 ). In some embodiments, the first surface 11 is concave at the optical axis and near the circumference.
  • the curvature radius R1 of the first surface 11 ranges from 20 mm ⁇ R1 ⁇ 300 mm. Further, the curvature radius R1 of the first surface 11 ranges from 50 mm ⁇ 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, etc.
  • the radius of curvature of the first surface 11 is too large, the light-gathering effect provided is small, the height along the optical axis is low, and the supporting effect provided becomes weak; if the radius of curvature of the first surface 11 is too small, edge distortion will be excessively compensated during imaging. It becomes difficult, and the convexity along the optical axis direction is too high, the slope change is too steep, and the manufacturing difficulty increases.
  • the curvature radius R1 of the first surface 11 ranges from 1 mm ⁇ R1 ⁇ 300 mm. Further, the curvature radius R1 of the first surface 11 ranges from 1 mm ⁇ R1 ⁇ 50 mm. Furthermore, the curvature radius R1 of the first surface 11 ranges from 10 mm ⁇ R1 ⁇ 30 mm.
  • the radius of curvature R1 of the first surface 11 may be, but is not limited to, 1 mm, 3 mm, 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 60 mm, 70 mm, 80 mm, 100 mm, 120 mm , 140mm, 150mm, 160mm, 180mm, 200mm, 220mm, 240mm, 260mm, 280mm, 300mm, etc.
  • the radius of curvature of the first surface 11 is too large, and the diopter (ie, optical power) provided by the first surface 11 is too small; the radius of curvature of the first surface 11 is too small, making it difficult to compensate for excessive edge distortion during imaging, and along the The optical axis direction is too convex and the slope change is too steep, which increases manufacturing difficulties.
  • the zoom layer 30 is light-transmissive.
  • the material of the zoom layer 30 may include, but is not limited to, at least one of polydimethylsiloxane, polyurethane, fluorosilicone, silicone oil polymerized elastomer, and the like.
  • the material of the zoom layer 30 may include but is not limited to at least one of polydimethylsiloxane, polyurethane, fluorosilicone, etc.
  • the material of the zoom layer 30 may also include organic acid or inorganic acid fat. family to improve the stability of the zoom layer 30 and adjust the refractive index of the zoom layer 30 .
  • the material of the zoom layer 30 may also include at least one of titanium dioxide, zirconium oxide, tin oxide, zinc oxide, etc. The titanium dioxide, zirconium oxide, tin oxide, and zinc oxide are used to change or adjust the refractive index of the zoom layer 30 .
  • the zoom layer 30 can be prepared through the following steps: using silicone oil such as methyl silicone oil, phenyl silicone oil, hydroxyl silicone oil, and adding a certain proportion of coupling agent (such as silane coupling agent). (at least one of a coupling agent, a titanate coupling agent, and a borate coupling agent), and after high-temperature curing or light curing, an elastomer is obtained.
  • the hardness or elasticity of the elastomer can be adjusted by the degree of cross-linking, and the degree of cross-linking can be adjusted by the amount of coupling agent added.
  • the flexible layer 50 is light-transmissive.
  • the material of the flexible layer 50 may include, but is not limited to, at least one of glass and resin.
  • the glass may be, but is not limited to, at least one of quartz glass, glass containing elements such as boron, phosphorus, silicon, or glass containing elements such as Na, K, etc.
  • the glass may be at least one of silicate glass, aluminosilicate glass, phosphate glass, aluminophosphate glass, and borate glass.
  • the glass may be, but is not limited to, ultra-thin glass (UTG), such as ultra-thin glass from companies such as SCHOTT and Corning.
  • the resin may be, but is not limited to, at least one of polymethyl methacrylate (PMMA), polycarbonate (PC), and allyl diglycol dicarbonate.
  • the flexible layer 50 includes a stacked base layer (not shown) and a silicon dioxide layer (not shown).
  • the base layer is a silicon or glass substrate.
  • the silicon dioxide layer is chemically Vapor phase deposition (CVD) is deposited on the surface of the base layer.
  • the thickness of the flexible layer 50 may be 20 ⁇ m to 100 ⁇ m. In other words, the thickness of the flexible layer 50 along the optical axis direction. Specifically, the thickness of the flexible layer 50 may be, but is not limited to, 20 ⁇ m, 30 ⁇ m, 40 ⁇ m, 50 ⁇ m, 60 ⁇ m, 70 ⁇ m, 80 ⁇ m, 90 ⁇ m, 100 ⁇ m, etc.
  • the flexible layer 50 can also be a glass layer with a thickness greater than 100 ⁇ m (such as 150 ⁇ m, 200 ⁇ m, etc.), on which the electrode layer and piezoelectric material are prepared, and then ground to a thickness of 20 ⁇ m to 100 ⁇ m.
  • the thickness of the flexible layer 50 may be 20 ⁇ m to 100 ⁇ m, which means that the thickness of the flexible layer 50 may be any value between 20 ⁇ m and 100 ⁇ m, including the endpoint 20 ⁇ m and the endpoint 100 ⁇ m.
  • the shape of the flexible layer 50 may be circular; in other words, the shape of the flexible layer 50 is along a cross-section perpendicular to the optical axis.
  • the flexible layer 50 may have a diameter of 50 mm to 300 mm.
  • 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, etc.
  • the flexible layer 50 has a second surface 51 away from the zoom layer 30 .
  • the curvature radius R2 of the second surface 51 ranges from 50 mm ⁇ R2 ⁇ 100 mm.
  • the curvature radius R2 of the second surface 51 may be, but is not limited to, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, or 100mm.
  • the radius of curvature of the second surface 51 is greater than 200 mm, the light condensing effect or divergence effect of the formed lens assembly 100 is too small.
  • the radius of curvature of the second surface 51 is less than 50 mm, the second surface 51 is too curved and is not suitable for optical imaging.
  • the system is 200, the spherical aberration is too large, which will increase edge distortion.
  • the second surface is spherical or aspherical, and the second surface is convex or concave at the optical axis.
  • the carrier layer 10, the zoom layer 30 and the flexible layer 50 are connected in sequence.
  • the carrier layer 10 is connected to the zoom layer 30
  • the zoom layer 30 is connected to the flexible layer 50 .
  • This allows the zoom layer 30 to better deform together with the flexible layer 50 when the flexible layer 50 bends and deforms, and the bearing layer 10, the zoom layer 30 and the flexible layer 50 are always in sequential contact during the zooming process. That is to say, the zoom layer 30 is in contact with the first surface 11 side of the carrier layer 10 , and the flexible layer 50 is in contact with the side of the zoom layer 30 away from the carrier layer 10 .
  • the refractive index n1 of the carrier layer 10 is between 95% and 105% of the refractive index n2 of the zoom layer 30 .
  • the refractive index n1 of the carrier layer 10 and the refractive index n2 of the zoom layer 30 differ within a range of ⁇ 5%.
  • 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, etc. The closer the refractive index of the zoom layer 30 is to the refractive index of the carrier layer 10, the easier it is to form the lens assembly 100 with a single optical surface.
  • the refractive index n2 of the zoom layer 30 may be 1.1 to 2.0. Specifically, it can be but is not limited to 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, etc.
  • the refractive index n3 of the flexible layer 50 is between 95% and 105% of the refractive index n2 of the zoom layer 30 .
  • the refractive index n3 of the flexible layer 50 and the refractive index n2 of the zoom layer 30 differ within a range of ⁇ 5%.
  • 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, etc. The closer the refractive index of the flexible layer 50 is to the refractive index of the carrier layer 10, the easier it is to form the lens assembly 100 with a single optical surface.
  • the 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 .
  • the actuator 70 is an annular structure, such as an annular structure.
  • the orthographic projection of the actuator 70 on the flexible layer 50 is disposed around the outer periphery of the orthographic projection of the zoom layer 30 on the flexible layer 50 . This can better prevent the actuator 70 from affecting the propagation path of light in the lens assembly 100 .
  • 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., the second surface 51 side), when the first driving component 71 is loaded with voltage, the flexible layer 50 is driven to deform, thereby driving the zoom layer 30 to elastically deform to achieve the focal length of the lens assembly 100 Variety.
  • the first driving component 71 is at least one of a piezoelectric driving component, an electrostrictive driving component, and a magnetostrictive driving component.
  • the first driving component 71 is a ring-shaped structure, for example, the first driving component 71 is a circular ring-shaped structure. It can be understood that the orthographic projection of the first driving component 71 on the flexible layer 50 is a ring-shaped structure.
  • the first driving component 71 includes a first electrode 711 , an actuation layer 713 and a second electrode 715 that are stacked in sequence.
  • the first electrode 711 of the first driving component 71 is further away from the flexible layer 50 than the second electrode 715 of the first driving component 71 .
  • the first electrode 711 and the second electrode 715 are used to apply voltage, so that the actuating layer 713 undergoes deformation such as expansion and contraction, thereby driving the flexible layer 50 to undergo bending deformation.
  • 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.
  • 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 and the material of the second electrode 715 may be the same or different, and are not specifically limited in this application.
  • the material of the actuation layer 713 may be, but is not limited to, at least one of piezoelectric material, electrostrictive material, and magnetostrictive material.
  • PZT lead zirconate titanate
  • PVDF piezoelectric film polyvinyliden
  • the electrostrictive material may be, but is not limited to, magnesium lead niobate, etc.
  • the magnetostrictive material may be, but is not limited to, a ferrite magnetostrictive material, such as at least one of nickel-cobalt ferrite material, nickel-cobalt-copper ferrite material, and the like.
  • the thickness of the actuation layer 713 may be 1 ⁇ m to 100 ⁇ m.
  • the thickness of the actuation layer 713 may be, but is not limited to, 1 ⁇ m, 2 ⁇ m, 3 ⁇ m, 4 ⁇ m, 5 ⁇ m, 8 ⁇ m, 10 ⁇ m, 15 ⁇ m, 20 ⁇ m, 30 ⁇ m, 40 ⁇ m, 50 ⁇ m, 60 ⁇ m, 70 ⁇ m, 80 ⁇ m, 90 ⁇ m, 100 ⁇ m, etc.
  • the material of the actuation layer 713 is lead zirconate titanate
  • the actuation layer 713 can be directly formed on the flexible layer 50 using a sol-gel method or a magnetron sputtering method.
  • the first driving component 71 may be formed first, and then bonded to the flexible layer 50 through adhesives such as hot melt glue, light-curing glue, and optical glue.
  • the actuator 70 includes a first driving component 71 and a second driving component 73.
  • the first driving component 71 is disposed away from the flexible layer 50.
  • the second driving component 73 is disposed on the side of the flexible layer 50 facing the zoom layer 30 .
  • the flexible layer 50 is driven to deform, thereby driving the zoom layer 30 to elastically deform, so as to change the focal length of the lens assembly 100 .
  • first driving component 71 and a second driving component are respectively provided with a first driving component 71 and a second driving component on opposite sides of the flexible layer 50 .
  • the flexible layer 50 of the lens assembly 100 can have a greater degree of curvature (ie, a smaller radius of curvature), thereby having greater optical power and a greater range of focal length changes.
  • the first driving component 71 please refer to the description of the corresponding parts in the above embodiment, which will not be described again here.
  • first driving component 71 and the second driving component 73 are coaxially arranged, and the orthographic projection of the first driving component 71 and the second driving component 73 on the flexible layer 50 is at least Partially overlapped.
  • the second driving component 73 is at least one of a piezoelectric driving component, an electrostrictive driving component, and a magnetostrictive driving component.
  • the second driving component 73 has an annular structure, for example, the second driving component 73 has a circular annular structure. It can be understood that the orthographic projection of the second driving component 73 on the flexible layer 50 is a ring-shaped structure.
  • the second driving component 73 includes a first electrode 711, an actuation layer 713 and a second electrode 715 that are stacked in sequence.
  • the first electrode 711 of the second driving component 73 is closer to the flexible layer 50 than the second electrode 715 of the second driving component 73 .
  • the first electrode 711 and the second electrode 715 are used to apply voltage, so that the actuating layer 713 undergoes deformation such as expansion and contraction, thereby driving the flexible layer 50 to undergo bending deformation.
  • the first electrode 711, the actuation layer 713, and the second electrode 715 please refer to the descriptions in the corresponding parts above, and will not be described again here.
  • both the first driving component 71 and the second driving component 73 are piezoelectric driving components. In other embodiments, both the first driving component 71 and the second driving component 73 are electrostrictive driving components. In some embodiments, the first driving component 71 is a piezoelectric driving component, and the second driving component 73 is an electrostrictive driving component. In some embodiments, the first driving component 71 is an electrostrictive driving component, and the second driving component 73 is a piezoelectric driving component. In some embodiments, both the first driving component 71 and the second driving component 73 are magnetostrictive driving components.
  • the first driving component 71 is a piezoelectric driving component, and the second driving component 73 is a magnetostrictive driving component. In some embodiments, the first driving component 71 is an electrostrictive driving component, and the second driving component 73 is a magnetostrictive driving component.
  • the carrier layer 10 , the zoom layer 30 , the flexible layer 50 and the actuator 70 are coaxially arranged, and all take the optical axis of the lens assembly 100 as the axis of symmetry.
  • the first surface 11 is a convex surface at the optical axis.
  • the second driving component 73 When a voltage is applied to generate the second electric field E2, the second surface 51 is spherical and protrudes in a direction away from the zoom layer 30, wherein the direction of the first electric field is away from the first driving component 71
  • One side of the flexible layer 50 points to the side of the first driving component 71 close to the flexible layer 50 (as shown by arrow E1 in FIG. 8 ); the direction of the second electric field deviates from the second driving component 73 away from the flexible layer 50 .
  • One side of the layer 50 points to the side of the second driving component 73 close to the flexible layer 50 (as shown by arrow E2 in FIG. 8 ).
  • the state of the lens assembly 100 is called the first state.
  • the first driving component 71 when the first driving component 71 applies a voltage to generate a first electric field, and when the second driving component 73 applies a voltage to generate a second electric field, the first driving component 71 exerts a force on the flexible layer 50 under the action of the first electric field.
  • the second surface 51 is stretched, and the second driving component 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 stretched.
  • the tensile force generated by the first driving component 71 and the compressive force generated by the second driving component 73 can be adjusted, thereby adjusting the bending degree of the flexible layer 50 ( or the radius of curvature of the second surface 51), and then adjust the deflection direction of the light after passing through the flexible layer 50, the zoom layer 30 and the bearing layer 10 in sequence, and then adjust the focal length, optical power and other parameters of the lens assembly 100.
  • the voltage applied to the first driving component 71 to generate the first electric field E1 can be achieved in one of the following ways: for example, the first electrode 711 of the first driving component 71 is loaded with a positive voltage of 50V.
  • the second electrode 715 is loaded with a voltage of 0V (ie, grounded) to generate a first electric field from the side of the first driving component 71 away from the flexible layer 50 to the side of the first driving component 71 close to the flexible layer 50 E1.
  • the first electrode 711 of the first driving component 71 is loaded with a positive voltage of 80V, and the second electrode 715 of the first driving component 71 is loaded with a positive voltage of 30V, so as to generate a direction from the side of the first driving component 71 away from the flexible layer 50 .
  • the first driving component 71 is close to the first electric field E1 on one side of the flexible layer 50 .
  • the first electrode 711 of the first driving component 71 is loaded with a voltage of 0V (i.e., grounded), and the second electrode 715 of the first driving component 71 is loaded with a negative voltage of -50V to generate a voltage from the first driving component 71 away from the flexible layer 50
  • One side of the first driving component 71 is directed to the first electric field E1 on the side close to the flexible layer 50 and so on.
  • the positive, negative, and numerical value of the voltage applied to the first electrode 711 of the first driving component 71 and the second electrode 715 of the first driving component 71 can be designed according to the surface shape and radius of curvature of the second surface 51 , which are not specified in this application. limited.
  • the voltage applied to the second driving component 73 to generate the second electric field E2 can be achieved in one of the following ways: for example, the first electrode 711 of the second driving component 73 is loaded with a voltage of 0V (ie, grounded), and the second driving component 73 is loaded with a voltage of 0V (i.e., grounded).
  • the second electrode 715 of the component 73 is loaded with a voltage of 50V to generate a second electric field E2 directed from the side of the second driving component 73 away from the flexible layer 50 to the side of the second driving component 73 close to the flexible layer 50 .
  • the first electrode 711 of the second driving component 73 is loaded with a positive voltage of 30V
  • the second electrode 715 of the second driving component 73 is loaded with a positive voltage of 80V, so as to generate a direction from the side of the second driving component 73 away from the flexible layer 50 .
  • the second driving component 73 is close to the second electric field E2 on one side of the flexible layer 50 .
  • the first electrode 711 of the second driving component 73 is loaded with a negative voltage of -50V
  • the second electrode 715 of the second driving component 73 is loaded with a voltage of 0V (i.e., grounded), so as to generate a voltage from the second driving component 73 away from the flexible layer 50
  • One side points to the second electric field E2 on the side of the second driving component 73 close to the flexible layer 50 and so on.
  • the positive, negative, and numerical value of the voltage applied to the first electrode 711 of the second driving component 73 and the second electrode 715 of the first driving component 71 can be designed according to the surface shape and radius of curvature of the second surface 51 , which are not specified in this application. limited.
  • the first surface 11 is a convex surface at the optical axis.
  • the second driving component 73 When a voltage is applied to generate the fourth electric field E4, the second surface 51 is aspherical, and the second surface 51 protrudes toward the direction away from the zoom layer 30 at the optical axis, wherein the third electric field The direction is from the side of the first driving component 71 close to the flexible layer 50 to the side of the first driving component 71 away from the flexible layer 50 (as shown by arrow E3 in Figure 9 ); the fourth electric field The direction is from the side of the second driving component 73 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 ).
  • the state of the lens assembly 100 is called the second state.
  • the first driving component 71 when the first driving component 71 applies a voltage to generate a third electric field, and when the second driving component 73 applies a voltage to generate a fourth electric field, the first driving component 71 exerts a force on the flexible layer 50 under the action of the first electric field.
  • the second surface 51 is compressed, and the second driving component 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.
  • the surface of the flexible layer 50 away from the second surface 51 is also subjected to a compressive force (as shown by arrow b in Figure 9 ).
  • the flexible layer 50 is compressed between the compressive force of the first driving component 71 and the third
  • the second surface 51 is aspherical and protrudes in a direction away from the zoom layer 30 due to the combined action of the compressive forces of the two driving components 73 .
  • the flexible layer 50 bends and deforms, it will squeeze the zoom layer 30 and undergo elastic deformation, so that the flexible layer 50 , the zoom layer 30 and the bearing layer 10 cooperate with each other to form an aspherical convex lens with a light-gathering effect.
  • the direction of the first electric field E1 and the direction of the second electric field E2 are the same, and the directions of the first electric field E1 and the second electric field E2 are both along the optical axis from the zoom layer 30 toward the flexible layer 50 .
  • the compressive force generated by the first driving component 71 and the compressive force generated by the second driving component 73 can be adjusted, thereby adjusting the bending degree of the flexible layer 50 (or The radius of curvature of the second surface 51), thereby adjusting the deflection direction of the light after passing through the flexible layer 50, the zoom layer 30 and the bearing layer 10 in sequence, and thereby adjusting the focal length, optical power and other parameters of the lens assembly 100.
  • the voltage applied to the first driving component 71 to generate the third electric field E3 can be achieved in one of the following ways: for example, the first electrode 711 of the first driving component 71 is loaded with a voltage of 0V (i.e., grounded). The second electrode 715 of the component 71 is loaded with a positive voltage of 50V to generate a third electric field from the side of the first driving component 71 close to the flexible layer 50 to the side of the first driving component 71 away from the flexible layer 50 E3.
  • the first electrode 711 of the first driving component 71 is loaded with a positive voltage of 30V
  • the second electrode 715 of the first driving component 71 is loaded with a positive voltage of 80V to generate a voltage directed from the side of the first driving component 71 close to the flexible layer 50
  • the first driving component 71 is away from the third electric field E3 on one side of the flexible layer 50 .
  • the first electrode 711 of the first driving component 71 is loaded with a negative voltage of -50V
  • the second electrode 715 of the first driving component 71 is loaded with a voltage of 0V (that is, grounded) to generate a voltage from the first driving component 71 close to the flexible layer 50
  • One side of the first driving component 71 points to the third electric field E3 and so on on the side of the first driving component 71 away from the flexible layer 50 .
  • the positive, negative, and numerical value of the voltage applied to the first electrode 711 of the first driving component 71 and the second electrode 715 of the first driving component 71 can be designed according to the surface shape and radius of curvature of the second surface 51 , which are not specified in this application. limited.
  • the voltage applied to the second driving component 73 to generate the fourth electric field E4 can be achieved in one of the following ways: for example, the first electrode 711 of the second driving component 73 is loaded with a voltage of 0V (ie, grounded), and the second driving component 73 is loaded with a voltage of 0V (i.e., grounded).
  • the second electrode 715 of the component 73 is loaded with a voltage of 50V to generate a fourth electric field E4 directed from the side of the second driving component 73 away from the flexible layer 50 to the side of the second driving component 73 close to the flexible layer 50 .
  • the first electrode 711 of the second driving component 73 is loaded with a positive voltage of 30V
  • the second electrode 715 of the second driving component 73 is loaded with a positive voltage of 80V, so as to generate a direction from the side of the second driving component 73 away from the flexible layer 50 .
  • the second driving component 73 is close to the fourth electric field E4 on one side of the flexible layer 50 .
  • the first electrode 711 of the second driving component 73 is loaded with a negative voltage of -50V
  • the second electrode 715 of the second driving component 73 is loaded with a voltage of 0V (i.e., grounded), so as to generate a voltage from the second driving component 73 away from the flexible layer 50
  • One side points to the fourth electric field E4 and so on on the side of the second driving component 73 close to the flexible layer 50
  • the positive, negative, and numerical value of the voltage applied to the first electrode 711 of the second driving component 73 and the second electrode 715 of the first driving component 71 can be designed according to the surface shape and radius of curvature of the second surface 51 , which are not specified in this application. limited.
  • the first surface 11 is a convex surface at the optical axis.
  • the lens component 100 has The first focal length; when the first driving component 71 applies a voltage to generate a first electric field, and the second driving component 73 applies a voltage to generate a second electric field, the lens assembly 100 has a second focal length; when the first driving component When the component 71 applies a voltage to generate a third electric field, and the second driving component 73 applies a voltage to generate a fourth electric field, the lens component 100 has a third focal length, and the first focal length, the second focal length and the third Focal lengths differ from each other.
  • the lens component 100 can be made to have different focal lengths, so that zooming can be performed within a larger focal length range to meet the requirements. Application requirements for more shooting scenes.
  • the first surface 11 is a concave surface at the optical axis
  • the flexible layer 50 has a second surface 51 away from the zoom layer 30.
  • the first driving When the component 71 applies a voltage to generate a first electric field, and the second driving component 73 applies a voltage to generate a second electric field, the second surface 51 is a spherical surface, and the second surface 51 is oriented close to the optical axis at the optical axis.
  • the direction of the zoom layer 30 is concave, wherein the direction of the first electric field is from the side of the first driving component 71 close to the flexible layer 50 to the side of the first driving component 71 away from the flexible layer 50 (such as (As shown by arrow E1 in Figure 10 ); the direction of the second electric field is 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 (as shown in Figure 10 ); 10 indicated by arrow E2).
  • the state of the lens assembly 100 is called the third state.
  • the first driving component 71 when the first driving component 71 applies a voltage to generate a first electric field, and when the second driving component 73 applies a voltage to generate a second electric field, the first driving component 71 exerts a force on the flexible layer 50 under the action of the first electric field.
  • the second surface 51 is compressed, 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 compressed.
  • 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 Figure 10), and finally the flexible layer 50 is compressed between the compressive force of the first driving component 71 and The second driving component 73 undergoes bending deformation under the combined action of the tensile force.
  • the second surface 51 is spherical and is concave toward the direction close to the zoom layer 30 . After the flexible layer 50 bends and deforms, it will squeeze the zoom layer 30 and undergo elastic deformation, so that the flexible layer 50 , the zoom layer 30 and the bearing layer 10 cooperate with each other to form a concave lens with divergence.
  • 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 from the zoom layer 30 to the flexible layer 50 along the optical axis.
  • the direction of the second electric field E2 is from the flexible layer 50 along the optical axis. Towards zoom layer 30.
  • the compressive force generated by the first driving component 71 and the tensile force generated by the second driving component 73 can be adjusted, thereby adjusting the bending degree of the flexible layer 50 ( or the radius of curvature of the second surface 51), and then adjust the deflection direction of the light after passing through the flexible layer 50, the zoom layer 30 and the bearing layer 10 in sequence, and then adjust the focal length, optical power and other parameters of the lens assembly 100.
  • the voltage applied to the first driving component 71 to generate the first electric field E1 can be achieved in one of the following ways: for example, the first electrode 711 of the first driving component 71 is loaded with a voltage of 0V (that is, grounded), and the first driving component 71 is loaded with a voltage of 0V (ie, grounded).
  • the second electrode 715 of the component 71 is loaded with a positive voltage of 50V to generate a first electric field from the side of the first driving component 71 close to the flexible layer 50 to the side of the first driving component 71 away from the flexible layer 50 E1.
  • the first electrode 711 of the first driving component 71 is loaded with a positive voltage of 30V
  • the second electrode 715 of the first driving component 71 is loaded with a positive voltage of 80V to generate a voltage directed from the side of the first driving component 71 close to the flexible layer 50
  • the first driving component 71 is away from the first electric field E1 on the side of the flexible layer 50 .
  • the first electrode 711 of the first driving component 71 is loaded with a negative voltage of -50V
  • the second electrode 715 of the first driving component 71 is loaded with a voltage of 0V (that is, grounded) to generate a voltage from the first driving component 71 close to the flexible layer 50
  • One side of the first electric field E1 points to the side of the first driving component 71 away from the flexible layer 50 and so on.
  • the positive, negative, and numerical value of the voltage applied to the first electrode 711 of the first driving component 71 and the second electrode 715 of the first driving component 71 can be designed according to the surface shape and radius of curvature of the second surface 51 , which are not specified in this application. limited.
  • the voltage applied to the second driving component 73 to generate the second electric field E2 can be achieved in one of the following ways: for example, the first electrode 711 of the second driving component 73 is loaded with a voltage of 50V, and the first electrode 711 of the second driving component 73 is loaded with a voltage of 50V.
  • the two electrodes 715 are loaded with a voltage of 0V (i.e., grounded) to generate a second electric field E2 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 .
  • the first electrode 711 of the second driving component 73 is loaded with a positive voltage of 80V
  • the second electrode 715 of the second driving component 73 is loaded with a positive voltage of 50V, so as to generate a direct voltage from the side of the second driving component 73 close to the flexible layer 50
  • the second driving component 73 is away from the second electric field E2 on one side of the flexible layer 50 .
  • the first electrode 711 of the second driving component 73 is loaded with a voltage of 0V (ie, grounded), and the second electrode 715 of the second driving component 73 is loaded with a negative voltage of -50V, so as to generate a voltage from the second driving component 73 close to the flexible layer 50
  • One side of the second driving component 73 points to the second electric field E2 and so on on the side of the second driving component 73 away from the flexible layer 50 .
  • the positive, negative, and numerical value of the voltage applied to the first electrode 711 of the second driving component 73 and the second electrode 715 of the first driving component 71 can be designed according to the surface shape and radius of curvature of the second surface 51 , which are not specified in this application. limited.
  • the first surface 11 is a concave surface at the optical axis
  • the flexible layer 50 has a second surface 51 away from the zoom layer 30.
  • the first driving When the component 71 applies a voltage to generate a third electric field, and the second driving component 73 applies a voltage to generate a fourth electric field, the second surface 51 is an aspherical surface, and the second surface 51 is oriented close to the optical axis.
  • the direction of the zoom layer 30 is concave, wherein the direction of the third electric field is from the side of the first driving component away from the flexible layer to the side of the first driving component close to the flexible layer (arrow in Figure 11 E3); the direction of the fourth electric field is from the side of the second driving component close to the flexible layer to the side of the second driving component away from the flexible layer (shown by arrow E4 in Figure 11).
  • the state of the lens assembly 100 is called the fourth state.
  • the first driving component 71 when the first driving component 71 applies a voltage to generate a third electric field, and when the second driving component 73 applies a voltage to generate a fourth electric field, the first driving component 71 exerts a force on the flexible layer 50 under the action of the first electric field.
  • the second surface 51 is stretched, 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 Tensile force (as shown by arrow a in Figure 11), the surface of the flexible layer 50 away from the second surface 51 is also subject to a tensile force (as shown by arrow b in Figure 11), and finally the flexible layer 50 is in the first driving component 71
  • the bending deformation occurs under the combined action of the tensile force and the tensile force of the second driving component 73 .
  • the second surface 51 is aspherical and is recessed toward the direction close to the zoom layer 30 .
  • the flexible layer 50 After the flexible layer 50 bends and deforms, it will squeeze the zoom layer 30 and undergo elastic deformation, so that the flexible layer 50, the zoom layer 30 and the bearing layer 10 cooperate with each other to form an aspherical concave lens with divergence.
  • the direction of the first electric field E1 is the same as the direction of the second electric field E2.
  • the directions of the first electric field E1 and the second electric field E2 are both along the optical axis from the flexible layer 50 toward the zoom layer 30 .
  • the tensile force generated by the first driving component 71 and the tensile force generated by the second driving component 73 can be adjusted, thereby adjusting the bending degree of the flexible layer 50 (or the radius of curvature of the second surface 51), thereby adjusting the deflection direction of the light after passing through the flexible layer 50, the zoom layer 30 and the bearing layer 10 in sequence, and thereby adjusting the focal length, optical power and other parameters of the lens assembly 100.
  • the voltage applied to the first driving component 71 to generate the third electric field E3 can be achieved in one of the following ways: for example, the first electrode 711 of the first driving component 71 is loaded with a positive voltage of 50V.
  • the second electrode 715 is loaded with a voltage of 0V (ie, grounded) to generate a third electric field directed from the side of the first driving component 71 away from the flexible layer 50 to the side of the first driving component 71 close to the flexible layer 50 E3.
  • the first electrode 711 of the first driving component 71 is loaded with a positive voltage of 80V, and the second electrode 715 of the first driving component 71 is loaded with a positive voltage of 30V, so as to generate a direction from the side of the first driving component 71 away from the flexible layer 50 .
  • the first driving component 71 is close to the third electric field E3 on one side of the flexible layer 50 .
  • the first electrode 711 of the first driving component 71 is loaded with a voltage of 0V (i.e., grounded), and the second electrode 715 of the first driving component 71 is loaded with a negative voltage of -50V to generate a voltage from the first driving component 71 away from the flexible layer 50
  • One side of the first driving component 71 is directed toward the third electric field E3 and so on on the side of the first driving component 71 close to the flexible layer 50 .
  • the positive, negative, and numerical value of the voltage applied to the first electrode 711 of the first driving component 71 and the second electrode 715 of the first driving component 71 can be designed according to the surface shape and radius of curvature of the second surface 51 , which are not specified in this application. limited.
  • the voltage applied to the second driving component 73 to generate the fourth electric field E4 can be achieved in one of the following ways: for example, the first electrode 711 of the second driving component 73 is loaded with a voltage of 50V, and the first electrode 711 of the second driving component 73 is loaded with a voltage of 50V.
  • the two electrodes 715 are loaded with a voltage of 0V (i.e., grounded) to generate a fourth electric field E4 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 .
  • the first electrode 711 of the second driving component 73 is loaded with a positive voltage of 80V
  • the second electrode 715 of the second driving component 73 is loaded with a positive voltage of 50V, so as to generate a direct voltage from the side of the second driving component 73 close to the flexible layer 50
  • the second driving component 73 is away from the fourth electric field E4 on one side of the flexible layer 50 .
  • the first electrode 711 of the second driving component 73 is loaded with a voltage of 0V (ie, grounded), and the second electrode 715 of the second driving component 73 is loaded with a negative voltage of -50V, so as to generate a voltage from the second driving component 73 close to the flexible layer 50
  • One side of the second driving component 73 points to the fourth electric field E4 on the side facing away from the flexible layer 50 and so on.
  • the positive, negative, and numerical value of the voltage applied to the first electrode 711 of the second driving component 73 and the second electrode 715 of the first driving component 71 can be designed according to the surface shape and radius of curvature of the second surface 51 , which are not specified in this application. limited.
  • the first surface 11 is a concave surface at the optical axis.
  • the lens component 100 has a first focal length; when the first driving component 71 applies a voltage to generate a first electric field and the second driving component 73 applies a voltage to generate a second electric field, the lens assembly 100 has a second focal length; when the third driving component 73 applies a voltage to generate a second electric field.
  • the lens component 100 When a driving component 71 applies a voltage to generate a third electric field, and when the second driving component 73 applies a voltage to generate a fourth electric field, the lens component 100 has a third focal length, and the first focal length, the second focal length and The third focal lengths are different from each other. Therefore, by controlling the positive, negative, and magnitude of the voltages loaded on the first driving component 71 and the second driving component 73, the lens component 100 can be made to have different focal lengths, so that zooming can be performed within a larger focal length range to meet the requirements. Application requirements for more shooting scenes.
  • the lens assembly 100 further includes a support member 90 , which is located on the side of the flexible layer 50 away from the zoom layer 30 and surrounds the flexible layer 50 .
  • the outer periphery of the zoom layer 30 is provided, and the support member 90 is connected to at least one of the flexible layer 50 and the bearing layer 10 for supporting the flexible layer 50 .
  • the support member 90 can support the flexible layer 50 and the zoom layer 30 more stably, so that when the flexible layer 50 and the zoom layer 30 are deformed, the zoom process can be smoother.
  • the support member 90 can prevent the flexible layer 50 from squeezing the zoom layer 30 under the action of gravity, thereby causing the zoom layer 30 to deform, thereby making the overall structure of the lens assembly 100 more stable.
  • the support member 90 is connected to at least one of the flexible layer 50 and the load-bearing layer 10.
  • the support member 90 is connected to the flexible layer 50 (as shown in Figure 12 or Figure 13);
  • the support member 90 is connected to the load-bearing layer 10 , and the support member 90 abuts the flexible layer 50 (that is, the support member 90 is in contact with the flexible layer 50 , but is not connected, that is, not connected); or, the support member 90 is connected to the flexible layer 50 and the load-bearing layer 10 respectively (as shown in Figure 14).
  • the support member 90 when the support member 90 is connected to the flexible layer 50 , the support member 90 can be connected through an adhesive such as hot melt glue, light-curing glue (UV glue), optical glue (OCA glue), etc. Connected to flexible layer 50.
  • an adhesive such as hot melt glue, light-curing glue (UV glue), optical glue (OCA glue), etc. Connected to flexible layer 50.
  • the support member 90 and the load-bearing layer 10 can be connected through hot melt glue, light-curing glue (UV glue), or optical glue (OCA glue). Wait for adhesive connection.
  • UV glue light-curing glue
  • OCA glue optical glue
  • the support member 90 and the load-bearing layer 10 may also have an integrated structure.
  • the support member 90 and the load-bearing layer 10 are integrally injection molded. In this case, the load-bearing layer 10 and the support member 90 are both transparent. Light.
  • the material of the support member 90 may be, but is not limited to, silicon (such as monocrystalline silicon, polycrystalline silicon), silicon dioxide, glass, resin, metal, etc.
  • the glass may be, but is not limited to, at least one of quartz glass, glass containing elements such as boron, phosphorus, and silicon, or glass containing elements such as Na and K.
  • the glass may be at least one of silicate glass, aluminosilicate glass, phosphate glass, aluminophosphate glass, and borate glass.
  • the resin can be, but is not limited to, at least one of polymethyl methacrylate (PMMA), polycarbonate (PC), liquid crystal polymer (LIQUID CRYSTAL POLYMER, LCP), etc.
  • the metal may be, but is not limited to, stainless steel.
  • the lens assembly 100 includes a bearing layer 10 , a support member 90 , a zoom layer 30 , a flexible layer 50 and an actuator 70 .
  • the load-bearing layer 10 is connected to the support member 90 , and the load-bearing layer 10 and the support member 90 enclose a receiving space.
  • the zoom layer 30 is disposed on the first surface 11 of the load-bearing layer 10 and is located in the receiving space.
  • the flexible layer 50 is disposed on the side of the zoom layer 30 away from the bearing layer 10 and contacts the support member 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 away from the flexible layer 50.
  • the surface of the second surface 51 is located in the receiving space.
  • the bearing layer 10, the support member 90, the zoom layer 30, the flexible layer 50, the first driving component 71, and the second driving component 73 are all coaxially arranged with the optical axis as the axis of symmetry.
  • an embodiment of the present application also provides an optical imaging system 200 for imaging, which includes: the lens assembly 100 of the embodiment of the present application.
  • the optical imaging system 200 has an object side and an image side.
  • 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 .
  • the optical imaging system 200 of the present application further includes a non-zoom lens 210, which is coaxially disposed 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.
  • the number of non-zoom lenses 210 may be, but is not limited to, 1 piece, 2 pieces, 3 pieces, 4 pieces, 5 pieces, 6 pieces, 7 pieces, etc.
  • the optical imaging system 200 of the present application further includes an aperture 230 , which may be disposed between the object side of the first lens and the image side of the last lens of the optical imaging system 200 .
  • the position of the aperture 230 can be adjusted according to actual needs, and is not specifically limited in this application.
  • the optical imaging system 200 of the present application also includes an infrared cut-off filter 250.
  • the infrared cut-off filter 250 is provided on the image side of the last lens and is used to filter out light in other wavelength bands except visible light to improve the optical quality. Imaging quality of imaging system 200.
  • the infrared cut filter 250 can be made of glass.
  • the optical imaging system 200 also has an imaging surface 260.
  • the optical imaging system 200 of the present application also includes a protective sheet 270.
  • the protective sheet 270 is located between the infrared cut filter 250 and the imaging surface 260. , used to protect the photosensitive element located on the imaging surface 260 to achieve dust-proof effect.
  • the protective sheet 270 may be a glass protective sheet 270 or a plastic protective sheet 270.
  • the lens assembly 100, the non-zoom lens 210, the diaphragm 230, the infrared cut filter 250 and the protective film 270 are all coaxially arranged with the optical axis as the axis.
  • an embodiment of the present application also provides a camera module 300, which includes the optical imaging system 200 of the embodiment of the present application; and a photosensitive element 310, the photosensitive element 310 is located on the image side of the optical imaging system 200 .
  • 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.
  • the photosensitive element 310 can be, but is not limited to, at least one of a photosensitive coupling device (Charge Coupled Device, CCD) and a complementary metal-oxide semiconductor device (Complementary Metal-Oxide Semiconductor Sensor, CMOS sensor). .
  • CCD Charge Coupled Device
  • CMOS sensor Complementary Metal-Oxide Semiconductor Sensor
  • the camera module 300 further includes a lens barrel 330.
  • the lens barrel 330 has an accommodating cavity 331.
  • the accommodating cavity 331 is used to accommodate the optical imaging system 200.
  • the photosensitive element 310 is disposed on on the lens barrel 330 .
  • an embodiment of the present application also provides an electronic device 400, which includes: the camera module 300 of the embodiment of the present application, used to capture images; a display module 410, used to display the camera module images taken by the group 300; and a circuit board module 430, the circuit board module 430 is electrically connected to the camera module 300 and the display module 410 respectively, and is used to control the camera module 300 to shoot, And used to control the display module 410 to display.
  • the electronic device 400 of this application can be, but is not limited to, a camera, a camera phone, a driving recorder, a vehicle camera, a tablet computer, a notebook computer, a desktop computer, a smart bracelet, a smart watch, an e-reader, smart glasses, security equipment, Monitoring equipment, video doorbells and other electronic devices with camera functions 400.
  • the display module 410 may be, but is not limited to, 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), or a sub-millimeter luminescent display module.
  • LED display module light emitting diode display module
  • Micro LED display module micro light emitting diode display module
  • sub-millimeter luminescent display module a sub-millimeter luminescent display module.
  • diode display modules Mini LED display modules, mini light-emitting diode display modules
  • OLED display modules organic light-emitting diode display modules
  • the circuit board module 430 may 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 used to control the display module 410 to perform display.
  • the memory 433 is used to store the program code required for the operation of the processor 431, the program code required for controlling the display module 410, and the display module. 410 display content, etc.
  • the processor 431 includes one or more general-purpose processors 431, where the general-purpose processor 431 can be any type of device capable of processing electronic instructions, including a central processing unit (Central Processing Unit, CPU), a microprocessor , microcontrollers, main processors, controllers, ASICs, etc.
  • the processor 431 is used to execute various types of digital storage instructions, such as software or firmware programs stored in the memory 433, which can enable the computing device to provide a wide variety of services.
  • the memory 433 may include volatile memory (Volatile Memory), such as random access memory (Random Access Memory, RAM); the memory 433 may also include non-volatile memory (Non-Volatile Memory, NVM), such as Read-Only Memory (ROM), Flash Memory (FM), Hard Disk Drive (HDD) or Solid-State Drive (SSD). Memory 433 may also include a combination of the above types of memory.
  • volatile memory such as random access memory (Random Access Memory, RAM
  • NVM non-volatile Memory
  • ROM Read-Only Memory
  • FM Flash Memory
  • HDD Hard Disk Drive
  • SSD Solid-State Drive
  • the electronic device 400 in the embodiment of the present application also includes a middle frame 420 and a casing 450.
  • the casing 450 is spaced apart from the display module 410.
  • the middle frame 420 is disposed on the display module. between the group 410 and the casing 450, and the side of the middle frame 420 is exposed from the casing 450 and the display module 410.
  • the middle frame 420 and the housing 450 form an accommodation space, and the accommodation space is used to accommodate the circuit board module 430 and the camera module 300 .
  • the housing 450 has a light-transmitting part 451, and the camera module 300 can take pictures through the light-transmitting part 451 on the housing 450. That is, the camera module 300 in this embodiment is a rear camera module.
  • the light-transmitting portion 451 can be provided on the display module 410 , that is, the camera module 300 is a front-facing camera module 300 .
  • the light-transmitting part 451 is used as an opening for illustration. In other embodiments, the light-transmitting part 451 may not be an opening, but may be made of light-transmitting material, such as plastic, glass, etc. .
  • the electronic device 400 described in this embodiment is only a form of the electronic device 400 to which the lens assembly 100 is applied, and should not be understood as limiting the electronic device 400 provided in this application, nor should it be understood that These are limitations of the lens assembly 100 provided in various embodiments of the present application.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Studio Devices (AREA)
  • Lens Barrels (AREA)

Abstract

L'invention concerne un ensemble lentille (100), un système d'imagerie optique (200), un module de caméra (300) et un dispositif électronique. L'ensemble lentille (100) comprend : une couche de support (10), la couche de support (10) ayant une première surface (11), et la première surface (11) étant une surface incurvée ; une couche de zoom (30), la couche de zoom (30) étant disposée sur la première surface (11) de la couche de support (10) ; une couche souple (50), la couche souple (50) étant disposée sur le côté de la couche de zoom (30) à l'opposé de la couche de support (10) ; et un actionneur (713), l'actionneur (713) étant porté sur la couche souple (50), et l'actionneur (50) étant utilisé pour entraîner la couche souple (50) à subir une déformation, provoquant ainsi une déformation élastique dans la couche de zoom (30), ce qui permet de modifier la longueur focale de l'ensemble lentille (100). L'ensemble lentille (100) a une plus grande plage de changement de longueur focale et a une ouverture de passage de lumière plus grande.
PCT/CN2022/138786 2022-03-17 2022-12-13 Ensemble lentille, système d'imagerie optique, module de caméra et dispositif électronique WO2023173848A1 (fr)

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CN115297240A (zh) * 2022-08-02 2022-11-04 西安紫光展锐科技有限公司 摄像头组件和电子设备

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