WO2022037591A1 - Module de lentille, module de caméra et terminal - Google Patents

Module de lentille, module de caméra et terminal Download PDF

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Publication number
WO2022037591A1
WO2022037591A1 PCT/CN2021/113094 CN2021113094W WO2022037591A1 WO 2022037591 A1 WO2022037591 A1 WO 2022037591A1 CN 2021113094 W CN2021113094 W CN 2021113094W WO 2022037591 A1 WO2022037591 A1 WO 2022037591A1
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WO
WIPO (PCT)
Prior art keywords
light
lens
reflective element
splitting
optical axis
Prior art date
Application number
PCT/CN2021/113094
Other languages
English (en)
Chinese (zh)
Inventor
王庆平
郑士胜
苏忱
杨沫
郑云达
李瑞华
张熙
Original Assignee
华为技术有限公司
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Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2022037591A1 publication Critical patent/WO2022037591A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/004—Optical devices or arrangements for the control of light using movable or deformable optical elements based on a displacement or a deformation of a fluid
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
    • G02B26/0825—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a flexible sheet or membrane, e.g. for varying the focus
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/12—Fluid-filled or evacuated lenses
    • G02B3/14—Fluid-filled or evacuated lenses of variable focal length
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/10—Mirrors with curved faces
    • 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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
    • 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
    • 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
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0264—Details of the structure or mounting of specific components for a camera module assembly
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof

Definitions

  • the embodiments of the present application relate to the technical field of optical imaging, and in particular, to a lens module, a camera module, and a terminal.
  • the length of the camera module along the optical axis direction is relatively large, which increases the overall size of the camera module and occupies a large equipment space, which is not conducive to the miniaturization of the product.
  • the embodiments of the present application provide a lens module, a camera module and a terminal, which solve the problem of the large size of the camera module.
  • a lens module comprising: one or more lens groups, and reflective elements arranged in sequence along the first optical axis and a spectroscopic element; wherein, the one or more lens groups are respectively arranged on the object side of the spectroscopic element along the second optical axis, or between the spectroscopic element and the reflective element along the first optical axis, Or set on the side of the light splitting element away from the reflective element along the first optical axis; the lens group is used for imaging; the light splitting element comprises: a light splitting surface, a clip between the light splitting surface and the first optical axis The angle is greater than 0° and less than 90°; the beam splitting element is used to perform the first splitting of the light beam incident on the object side along the second optical axis to the beam splitting surface to form a first reflected beam reflected by the A reflected light beam is reflected to the light-re
  • the light is split for the second time to form a second transmitted light beam passing through the light splitting surface. It can be seen from the above that the combination of the light splitting element and the reflective element can change the transmission path of the light.
  • the optical path design of periscope and return is adopted to realize the folding of the optical path, which is beneficial to reduce the size of the lens module and realize the miniaturization of the terminal.
  • the light-splitting element includes a transparent flat plate, and the transparent flat plate includes a light-splitting surface, and an optical film layer is provided on the light-splitting surface. Therefore, the light splitting element adopts a transparent flat plate structure, and the structure is simple.
  • the light splitting element includes: at least two right angle prisms, the at least two right angle prisms form a cube structure, the contact surfaces of the at least two right angle prisms are light splitting surfaces, and the light splitting surfaces There is an optical film layer on it. Therefore, the spectroscopic element adopts a cube structure, which is more convenient to assemble in the lens module, and because the optical film layer is arranged inside the cube structure, it is not exposed to the air, and is not easily damaged and corroded, so the mechanical and chemical stability of the spectroscopic element is higher.
  • the included angle between the first optical axis and the beam splitting surface is 45°, and the included angle between the first optical axis and the second optical axis is 90°. Therefore, the light incident on the second optical axis can be reflected along the first optical axis, the optical path of the light is changed, and the periscope design is realized.
  • the optical film layer includes a polarization beam splitting film;
  • the lens module further includes: a wave plate, the wave plate is arranged between the reflective element and the beam splitting element; the polarization beam splitter
  • the film is used to split the incident unpolarized light beam into two polarized lights with different polarization directions, one of the polarized light passes through the polarizing beam splitting film, and the other polarized light is reflected, and the wave plate is used to change the reflected polarized light so that the reflected polarized light can pass through the polarized beam splitter again after being reflected by the reflective element.
  • the polarization beam splitter can split the incident unpolarized light into two polarized lights with different polarization directions.
  • the polarized light whose polarization direction is the first direction completely passes through, and the polarized light whose polarization direction is the second direction is reflected to the reflective element.
  • the phase difference between the first and second directions is ⁇ /2, and the reflected polarized light is first
  • the polarization direction changes by ⁇ /4, and then it is reflected by the reflective element, and its polarization state remains unchanged.
  • the light reflected by the reflective element passes through the quarter-wave plate, and the polarization direction increases by ⁇ /4, and the polarization direction becomes the first direction. Therefore, when it passes through the polarization beam splitter again, it will not be reflected, but will be completely transmitted.
  • imaging at the photosensitive element only 50% of the light is lost in the process, and the light loss is small.
  • the optical film layer includes a non-polarizing beam splitter film. Therefore, when the light beam passes through the optical film for the first time, for example, half of the light is reflected, half of the light is transmitted, and the reflected light beam is reflected by the reflective element. When the reflected light passes through the optical film for the second time, half of the light is transmitted. The light is reflected, half of the light is transmitted, and eventually 75% of the light is lost, and the non-polarized beam splitter film will not lose the polarized light information in the incident light.
  • the lens module further includes: a focal length adjustment assembly; the focal length adjustment assembly is connected to at least one of the lens assembly and the reflective element, and the focal length adjustment assembly is used to adjust the lens The focal length of the module. Therefore, by arranging the focusing assembly, the system focal length of the lens module can be changed to achieve a wider range of zooming.
  • the lens group includes: a zoom lens;
  • the focal length adjustment assembly includes: a zoom lens actuator connected with the zoom lens; the zoom lens actuator is used to adjust the zoom lens focal power. Therefore, the system focal length of the lens module can be changed by adjusting the focal length of the zoom lens, thereby realizing a wider range of zooming.
  • the zoom lens includes: a liquid lens or a flexible lens.
  • the liquid lens and the flexible lens have small size and fast zoom response, which reduces the space occupied by the lens module.
  • the reflective element includes a curved mirror;
  • the focal length adjustment assembly includes: a first reflective element actuator connected to the reflective element, the first reflective element actuator being connected to the reflective element The reflective element is connected; the first reflective element actuator is used to drive the first reflective element to translate along the second optical axis, so that the position of the first reflective element changes. Therefore, the system focal length of the lens module can be changed by adjusting the position of the reflective element, so as to achieve a wider range of zoom.
  • the reflective element includes a flexible reflective lens
  • the focus adjustment assembly includes: a second reflective element actuator connected to the reflective element, the second reflective element actuator being connected to The reflective element is connected; the second reflective element actuator is used to adjust the curvature of the reflective element. Therefore, the system focal length of the lens module can be changed by adjusting the shape of the reflective element, so as to achieve a wider range of zoom.
  • the lens module further includes: an anti-shake assembly, the anti-shake assembly is connected to the reflective element or the light splitting element, and the anti-shake assembly is used to perform jitter compensation for the light beam. Therefore, compared with the prior art to realize anti-shake by driving the movement of the lens group, the size of the lens group is larger, and the arrangement position of each lens in the lens group is fixed, and the entire lens group needs to be driven, which is difficult to achieve optical anti-shake.
  • a reflective element and a light-splitting element are provided, and it is only necessary to drive the reflective element or the light-splitting element to realize anti-shake, which is convenient for control.
  • the anti-shake assembly includes: a third reflective element actuator; the third reflective element actuator is connected to the reflective element, and the third reflective element actuator is used for Drive the reflective element to translate along the second optical axis and the first rotation axis or rotate around the second optical axis and the first rotation axis to compensate for the jitter of the light beam, wherein the first rotation axis is perpendicular to the first rotation axis. an optical axis and the second optical axis. Therefore, optical image stabilization can be achieved by adjusting the position or angle of the reflective element, which is convenient for control.
  • the anti-shake assembly is connected to the light splitting element, and the anti-shake assembly includes: a light splitting element actuator; the light splitting element actuator is connected to the light splitting element, and the light splitting element The actuator is used to drive the light splitting element to translate along the second optical axis or the first rotation axis, or to rotate and rotate around the second optical axis and the first rotation axis, so as to compensate for the jitter of the light beam, wherein the first A rotation axis is perpendicular to the first optical axis and the second optical axis.
  • optical image stabilization can be achieved by adjusting the position or angle of the spectroscopic element, which is convenient for control.
  • a light absorbing material is provided at the bottom of the light splitting element, and the light absorbing material is used for absorbing the first transmitted light beam. Therefore, the reflection of the first transmission beam is reduced, the reflected first transmission beam is prevented from interfering with imaging, and the imaging quality of the system is improved.
  • a second aspect of the present application provides a camera module, which is characterized by comprising an image sensor and the above-mentioned lens module, wherein the image sensor is disposed on a side of the light splitting element away from the reflective element, The image sensor is used to receive the first transmitted light beam of the camera module, and convert the optical signal included in the first transmitted light beam into an electrical signal; wherein the object side of the light splitting element, the light splitting element and the The lens group is provided at at least one position between the light-reflecting elements or between the light-splitting element and the image sensor.
  • the above-mentioned lens module has the same technical effect as the camera module provided by the foregoing embodiments, and details are not repeated here.
  • a terminal which is characterized in that it includes a display screen and the above-mentioned lens; the display screen has a display surface and a back side away from the display panel; the lens is located on the back side of the display screen; Alternatively, the display screen is provided with a mounting hole, and the lens is located in the mounting hole.
  • the above electronic device has the same technical effect as the camera module provided in the foregoing embodiment, and details are not described herein again.
  • FIG. 1 is a schematic structural diagram of a terminal provided by an embodiment of the present application.
  • FIG. 2a is a schematic diagram of a setting mode of a camera module provided by an embodiment of the present application.
  • FIG. 2b is a schematic diagram of another setting mode of the camera module provided by the embodiment of the application.
  • FIG. 2c is a schematic diagram of another setting mode of the camera module provided by the embodiment of the present application.
  • Fig. 2d is a kind of structural schematic diagram of the display screen in Fig. 1;
  • 3a is a schematic structural diagram of a lens module according to an embodiment of the application.
  • 3b is a schematic structural diagram of a camera module provided by an embodiment of the application.
  • 3c is a schematic structural diagram of a camera module provided by an embodiment of the present application.
  • 3d is a schematic structural diagram of a camera module provided by an embodiment of the application.
  • FIG. 4 is a schematic structural diagram of a camera module provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a spectroscopic element provided by an embodiment of the present application.
  • 6a is a schematic structural diagram of another spectroscopic element provided by an embodiment of the present application.
  • Fig. 6b is a schematic diagram of the exploded structure of the spectroscopic element in Fig. 6a;
  • FIG. 7 is a schematic structural diagram of a lens group provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a movement process of a reflective element provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of the deformation of the reflective element provided by the embodiment of the present application.
  • 10a is a schematic structural diagram of a camera module in Example 1;
  • 10b is a schematic structural diagram of a zoom lens provided by an embodiment of the application.
  • Fig. 10c is a schematic view of the working state of the zoom lens in Fig. 10b;
  • 10d is a schematic structural diagram of another zoom lens provided by an embodiment of the application.
  • Figure 10e is a schematic diagram of the working state of the zoom lens in Figure 10d;
  • 11a is a schematic structural diagram of a reflective element provided by an embodiment of the present application.
  • FIG. 11b is a schematic structural diagram of a reflective element provided by an embodiment of the present application.
  • 11c is a schematic structural diagram of a reflective element provided by an embodiment of the present application.
  • FIG. 11d is a schematic structural diagram of a reflective element provided by an embodiment of the present application.
  • Example 12a is a schematic diagram of the working state of the camera module in Example 1 under different camera modes
  • Example 13 is a schematic structural diagram of a camera module in Example 2.
  • Example 14 is a schematic diagram of the working state of the camera module in Example 2 under different camera modes
  • Example 15 is a schematic structural diagram of a camera module in Example 3.
  • Example 16 is a schematic structural diagram of a camera module in Example 4.
  • Example 17 is a schematic diagram of a spectroscopic process of a spectroscopic element in Example 5.
  • FIG. 18 is a schematic diagram of the spectroscopic process of another spectroscopic element in Example 6.
  • FIG. 18 is a schematic diagram of the spectroscopic process of another spectroscopic element in Example 6.
  • first”, second, etc. are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implying the number of indicated technical features.
  • a feature defined as “first”, “second”, etc. may expressly or implicitly include one or more of that feature.
  • plural may mean two or more.
  • orientations may include, but are not limited to, the orientations relative to the schematic placement of the components in the drawings. It should be understood that these orientations The terminology can be a relative concept, and they are used for relative description and clarification, which can change correspondingly according to the change of the orientation in which the components are placed in the figures.
  • connection should be understood in a broad sense.
  • connection can be a connection, a detachable connection, or an integrated body; it can be directly connected, or it can be Indirectly connected through an intermediary.
  • Optical power equal to the difference between the convergence of the image-side beam and the object-side beam convergence, which can characterize the ability of the optical system to deflect light.
  • Optical image stabilization In cameras or other similar imaging instruments, the settings of optical components, such as lens settings, are used to avoid or reduce the phenomenon of instrument shake in the process of capturing optical signals, thereby improving imaging quality. Usually, an actuator is used to drive the lens or sensor for position compensation, so as to reduce the influence of shaking on the image.
  • An embodiment of the present application provides a terminal.
  • the terminal can be a tablet computer, a mobile phone, an electronic reader, a remote control, a personal computer (PC), a notebook computer, a personal digital assistant (PDA), a vehicle-mounted device, an Internet TV, a wearable device, a TV Cameras and other products with cameras.
  • PC personal computer
  • PDA personal digital assistant
  • This embodiment of the present application does not specifically limit the specific form of the above-mentioned terminal.
  • the following embodiments are all exemplified by taking the terminal as a mobile phone as an example.
  • the terminal 1 includes a display screen 2 , a middle frame 3 , a casing (or referred to as a battery cover or a rear casing) 4 and a cover plate 5 .
  • the display screen 2 has a display surface a1 for viewing the display screen and a back surface a2 opposite to the above-mentioned display surface a1 .
  • the display screen 2 is an organic light emitting diode (organic light emitting diode, OLED) display screen. Since each light-emitting sub-pixel in the OLED display screen is provided with an electroluminescent layer, the OLED display screen can realize self-luminescence after receiving the working voltage.
  • OLED organic light emitting diode
  • the above-mentioned display screen 2 may be a liquid crystal display (liquid crystal display, LCD).
  • the above-mentioned terminal 1 may further include a backlight unit (backlight unit, BLU) for providing a light source to the liquid crystal display screen.
  • BLU backlight unit
  • the cover plate 5 is located on the side of the display screen 2 away from the middle frame 3.
  • the cover plate 5 may be, for example, a cover glass (CG), and the cover glass may have a certain degree of toughness.
  • the middle frame 3 is located between the display screen 2 and the housing 4, and the surface of the middle frame 3 away from the display screen 2 is used to install internal components such as batteries, printed circuit boards (PCBs), cameras (cameras), and antennas. After the casing 4 and the middle frame 3 are closed, the above-mentioned internal components are located between the casing 4 and the middle frame 3 .
  • internal components such as batteries, printed circuit boards (PCBs), cameras (cameras), and antennas.
  • the terminal 1 further includes a camera module for capturing images, the camera module is disposed on the surface of the display screen 2 and can be electrically connected to the PCB board.
  • the above-mentioned camera module can be used as a rear camera.
  • the camera module 6 can be located on the back a2 of the display screen 2 .
  • the light-receiving surface (the surface for receiving light) of the camera module 6 can be far away from the back a2 of the display screen 2 .
  • the above-mentioned camera module 6 can be used as a front camera.
  • the camera module 6 may be located on the back a2 of the display screen 2 .
  • the light-receiving surface of the camera module 6 may face the back a2 of the display screen 2 .
  • the display screen 2 may have a light-transmitting area 201 at a position corresponding to the camera module 6 .
  • the above-mentioned camera module 6 may be used as a front camera.
  • an installation area 202 may be provided on the display screen 2 , and the camera module 6 is located in the installation area 202 .
  • the light-receiving surface of the camera module 6 may be located on the same side as the display surface a1 of the display screen 2 .
  • the display screen 2 is divided into a display area A.
  • the display screen 2 further includes a peripheral area B located around the display area A. In another possible embodiment, the display screen 2 has no peripheral area B.
  • the relative positional relationship and shape of the display area A and the peripheral area B are not limited.
  • the peripheral area B surrounds the display area A as an example for illustration.
  • the camera module 6 included in the terminal 1 realizes specific functions by collecting the light rays that are emitted to the camera module 6 through the display screen 2 .
  • the display screen 2 only transmits light through the display area A. Based on this, in order to enable the light to enter the light-receiving surface of the camera module 6, as shown in FIG. 2d, the orthographic projection of the camera module 6 on the display screen 2 is located in the display in display area A of screen 2.
  • the camera module 6 includes: a lens module 600 .
  • the lens module 600 includes: a lens group 60 , and a light-reflecting element 62 and a light-splitting element 61 arranged along the first optical axis O in sequence.
  • the one or more lens groups 60 may be disposed on the object side of the light splitting element 61 along the second optical axis O', or disposed along the first optical axis O on the object side of the light splitting element 61, respectively. between the light-splitting element 61 and the light-reflecting element 62 , or along the first optical axis O, on the side of the light-splitting element 61 away from the light-reflecting element 62 .
  • the light-splitting element 61 includes: a light-splitting surface, and the included angle between the light-splitting surface and the first optical axis is greater than 0° and less than 90°.
  • the beam splitting element 61 is used for first splitting the light beam incident on the object side along the second optical axis O' to the beam splitting element 61 to form a first reflected beam reflected by the beam splitting element 61 .
  • the first optical axis O is reflected to the reflective element 62
  • the reflective element 62 is used to reflect the first reflected light beam to the light splitting element 61
  • the light splitting element 61 is also used to reflect the first reflected light beam back from the reflective element 62
  • a second beam splitting is performed to form a second transmitted light beam passing through the beam splitting surface.
  • the light splitting element and the reflective element are combined to change the transmission path of light, and the optical path design of periscope and return is adopted to realize optical path folding, which is beneficial to reduce the size of the camera module and realize miniaturization of the terminal.
  • the camera module 6 further includes: an image sensor 63 .
  • the image sensor 63 is disposed along the first optical axis O on the side of the light splitting element 61 away from the light reflecting element 62 , and the image sensor 63 is used to receive the first transmitted light beam of the camera module 6 .
  • the lens group 60 is provided at at least one position on the object side of the beam splitting element 61 , between the beam splitting element 61 and the reflective element 62 , or between the beam splitting element 61 and the image sensor 6 .
  • the lens group 60 can include one or more mirrors, and can transmit the received imaging beam to the image sensor 63.
  • the lens group 60 can also perform certain processing on the received imaging beam, such as changing the illuminance and achromatic processing.
  • the image sensor 63 is a device with a photoelectric conversion function, which can convert the optical signal of the imaging beam collected on the image acquisition area into an electrical signal that is proportional to the optical signal.
  • the image sensor 63 can be a charge-coupled device ( The CCD image sensor 63 composed of charged coupled device (CCD) or the CMOS image sensor 63 composed of complementary metal oxide semiconductor (CMOS).
  • CCD charged coupled device
  • CMOS complementary metal oxide semiconductor
  • the image sensor 63 has an image acquisition area, and the image sensor 63 can acquire the received imaging light beam through the image acquisition area (also called a photosensitive area or a photosensitive surface).
  • the image acquisition area also called a photosensitive area or a photosensitive surface.
  • the distance between the object to be photographed and the camera module 6 is not always the same.
  • the distance between the photographed object and the camera module 6 is close. That is to say, the object distance is not always fixed. In this way, in order to obtain a clear image, the system focal length of the camera module 6 must be changed according to the difference of the object distance. coke".
  • the focal length of the camera module 6 is longer. In order to achieve a longer focal length, one way is to use more lens combinations.
  • the overall optical path of the module is relatively long, which makes the overall size of the camera module large and occupies a large equipment space.
  • the embodiments of the present application provide an improved camera module.
  • the camera module further includes: a light splitting element 61 and a light reflecting element 62 .
  • the combination of the light-splitting element 61 and the reflective element 62 can be used to fold the optical path, without the need for a combination of multiple lenses, thereby reducing the size of the camera module.
  • the beam splitting element 61 can be a beam splitting prism with a transflective function, for example, the beam splitting prism has a beam splitting surface 611. Each time the light passes through the beam splitting surface 611, a part of the light will be reflected, and the other part of the light will be transmitted, and the reflected light will occur. The light path is changed.
  • the light-reflecting element 62 , the light-splitting element 61 , and the image sensor 63 are arranged in sequence along the first optical axis O, for example, the light-splitting element 61 is located between the light-reflecting element 62 and the image sensor 63 , and the first The included angle between an optical axis O and the beam splitting surface 611 is greater than 0° and less than 90°.
  • the beam splitting element 61 can be used to perform the first splitting of the light beam incident on the beam splitting surface 611 along the second optical axis O′ to form a first transmission through the beam splitting surface 611
  • the first reflected light beam is reflected to the light splitting surface along the second optical axis O
  • the light splitting element 61 is also used for the second splitting of the first reflected light beam reflected by the light reflecting element 62 to form a penetrating beam.
  • the second transmitted light beam passing through the light splitting surface 611 and the second reflected light beam reflected by the light splitting surface 611 are transmitted to the image sensor 63 along the second optical axis O.
  • the light splitting element 61 can change the transmission path of the light, and split the light beam transmitted along the second optical axis O', so that part of the light beam is transmitted along the first optical axis O, forming a periscope optical path form, changing the transmission of the optical path direction.
  • the reflective element 62 can change the transmission direction of the light again, so that the light transmitted along the first optical axis O is reflected, so that the light passes through the light splitting element 61 again to realize the folding of the optical path, and finally image on the sensor.
  • the combination of the light splitting element 61 and the reflective element 62 can change the transmission path of light, and the optical path design of periscope and return is adopted to realize the folding of the optical path, which is conducive to reducing the size of the camera module , realizing the miniaturization of the terminal.
  • the embodiment of the present application does not limit the number and position of the lens group 60 .
  • the lens group 60 may be one or more, at least on the object side of the beam splitting element 61 , between the beam splitting element 61 and the reflective element 62 , or between the beam splitting element 61 and the image sensor 63 .
  • the lens group 60 is provided at one position.
  • the lens group 60 is arranged on the object side of the light splitting element 61.
  • the lens group 60 can be arranged between the light splitting element 61 and the light reflecting element 62, or as shown in FIG.
  • the lens group 60 may be disposed between the light splitting element 61 and the image sensor 63 .
  • the multiple lens groups 60 there are multiple lens groups 60 , and the multiple lens groups 60 may be respectively disposed on the object side of the light splitting element 61 , between the light splitting element 61 and the light reflecting element 62 , or on all sides of the light splitting element 61 . between the spectroscopic element 61 and the image sensor 63 .
  • FIG. 4 there are three lens groups 60 , one lens group 60 is provided on the object side of the light splitting element 61 , and one lens group 60 is provided between the light splitting element 61 and the reflective element 62 . There is one lens group 60 , and one lens group 60 is provided between the spectroscopic element 61 and the image sensor 63 .
  • the lens group 60 on the object side of the light splitting element 61 is arranged along the second optical axis O', the lens group 60 between the light splitting element 61 and the light reflecting element 62, and the light splitting element 61 and the
  • the lens group 60 between the image sensors 63 is located on the first optical axis O with the image sensor 63 and the light splitting element 61 .
  • This embodiment of the present application does not limit the angle between the light splitting surface 611 and the first optical axis O.
  • the light splitting surface 611 and the first optical axis O are not limited.
  • the angle ⁇ between the first optical axes O is 45°
  • the angle ⁇ between the beam splitting surface 611 and the second optical axis O is 45°
  • the first optical axis O and the The included angle ⁇ between the second optical axes O' is 90°, so that the light beam incident along the second optical axis O' can be reflected along the first optical axis O.
  • the light-splitting element 61 includes a transparent flat plate, and the transparent flat plate includes: a light-splitting surface 611 , for example, an optical film layer is provided on the light-splitting surface 611 , and the optical film The layer is used to split the light beam passing through the light splitting surface 611, so that part of the light beam is reflected and another part of the light beam is transmitted.
  • the light splitting element 61 adopts a transparent flat plate structure, and the structure is simple.
  • the included angle between the beam splitting surface of the beam splitting element 61 and the first optical axis O is greater than 0° and less than 90°, it is difficult to assemble the above beam splitting element in the camera module, and the optical film layer is exposed to the air, which is easily damaged and damaged. Corrosion reduces the mechanical and chemical stability of the spectroscopic element 61 .
  • the light splitting element 61 includes: at least two right-angle prisms, the at least two right-angle prisms are glued to form a cube structure, and the contact surface of the at least two right-angle prisms is the light splitting surface 611, so the
  • an optical film layer is provided on the light splitting surface 611 , and the optical film layer is used to split the light beams passing through the light beam splitting surface 611 , so that part of the light beams are reflected and another part of the light beams are transmitted.
  • the light splitting element 61 includes: a first right angle prism 610 and a second right angle prism 612, and the angle between the inclined plane and the right angle plane of the first right angle prism 610 and the second right angle prism 612 is both 45°
  • the optical film layer is provided on the inclined surface of the first right angle prism 610 , and the inclined surfaces of the first right angle prism 610 and the second right angle prism 612 are glued together to form a cube-shaped beam splitter prism.
  • the spectroscopic element 61 adopts a cube structure, which is more convenient to assemble in the camera module, and because the optical film layer is not exposed to the air and is not easily damaged and corroded, the mechanical and chemical stability of the film layer material is higher.
  • the embodiments of the present application do not limit the material of the optical film layer.
  • the optical film layer is a polarizing beam splitting film
  • the optical module 6 further includes: a wave plate, and the wave plate is arranged on the between the light-reflecting element 62 and the light-splitting element 61 .
  • the polarizing beam splitter film is used to divide the incident non-polarized light beam into two polarized light beams with different polarization directions, wherein one beam of polarized light passes through the polarized beam splitter film, and the other beam of polarized light is reflected, and the wave plate is used for The polarization direction of the reflected polarized light is changed, so that the reflected polarized light can pass through the polarization beam splitting film again after being reflected by the reflective element.
  • the optical film layer includes a non-polarized beam splitting film
  • the non-polarized beam splitting film is used to split the incident non-polarized light beam, so that part of the light beam is transmitted and another part of the light beam is reflected.
  • the non-polarizing beam splitting film can divide a beam of light into two beams of light with the same spectral composition, that is, in a certain wavelength region, such as the visible light region, it has the same transmittance and reflectivity ratio for each wavelength, and its reflected light and Transmitted light is neutral.
  • the non-polarized beam splitting film will not lose the polarized light information in the incident light.
  • the optical path is folded, which can be used for photographing distant objects.
  • the distance between the photographed object and the camera module 6 is relatively close, the The focal length is short, and the focal length of the camera module needs to be changed to achieve a wider range of zoom.
  • a light-absorbing material is provided on the bottom of the light-splitting element or on a casing below the light-splitting element, and the light-absorbing material is used for absorbing the first transmitted light beam. Therefore, the reflection of the first transmission beam is reduced, the reflected first transmission beam is prevented from interfering with imaging, and the imaging quality of the system is improved.
  • the embodiments of the present application further improve the above-mentioned camera module.
  • the camera module further includes: a focal length adjustment component, the focal length adjustment component is connected with the lens group 60 and the reflection At least one connection of the element 62 , the focal length adjusting component is used to adjust the focal length of the camera module 6 .
  • the lens group 60 includes, for example, a zoom lens 6002 .
  • the focal length adjustment assembly includes: a zoom lens actuator connected to the zoom lens, and the zoom lens actuator is used to adjust the optical power of the zoom lens.
  • the zoom lens 6002 may be a liquid lens or a flexible lens.
  • the zoom lens 6002 includes a liquid lens, and its focal length can be changed by changing the optical power of the liquid surface.
  • the liquid lens may be one of an electro-wetting liquid lens, an acoustic radiation pressure liquid lens, a hydraulic pressure-driven liquid lens, and a dielectrophoretic liquid lens.
  • the liquid lens is used as the zoom lens in the lens group 30, which has small size and fast zoom response, reduces the space occupied by the camera module, and is beneficial to the miniaturization of the terminal device.
  • the zoom lens 6002 includes a flexible lens.
  • the flexible lens is made of flexible material.
  • a zoom lens actuator can be used to apply force to the flexible material to deform it, thereby changing the focal length of the flexible material.
  • the zoom lens actuator may be driven by various types of forces, such as piezoelectric driving, mechanical force driving, fluid pressure driving, electromagnetic driving, and the like.
  • the flexible lens is used as the zoom lens in the lens group 30, which can change the focal length of the camera module, has fast response speed, and is small in size, reduces the space occupied by the camera module, and is beneficial to the miniaturization of the terminal device.
  • the lens group 60 further includes: a fixed-focus lens 6001 .
  • the lens group 60 may also include a flat glass for protecting the lens group, a filter for filtering light of a specific wavelength, a light shielding sheet for eliminating stray light, etc., but these do not change the light propagation path.
  • the embodiments of the present application improve the above-mentioned camera module 6 .
  • the reflective element 62 may be configured as a curved mirror.
  • the focus adjustment assembly includes: a first reflective element actuator, and the first reflective element actuator is connected to the reflective element 62 .
  • the camera module provided by the embodiment of the present application has an internal coordinate system
  • the internal coordinate system is, for example, a three-dimensional coordinate system
  • the internal coordinate system includes: the axis with the image sensor 63 and the reflective element 62 A parallel z-axis, an x-axis perpendicular to the z-axis and parallel to the height direction of the mirror group, and a y-axis perpendicular to the z-axis and perpendicular to the height direction of the mirror group.
  • the first reflective element actuator is used to drive the first reflective element to translate along the z-axis, as shown in (a), (b), and (c) in FIG. 8 , so that the position of the first reflective element is changes happened.
  • the first reflective element actuator may be implemented by a Micro-Electro-Mechanical System (MEMS) actuator technology, or may be implemented by a voice coil motor (VCM) technology, It can also be realized by shape memory alloy (SMA) motor technology, and it can also be realized by screw stepping motor technology.
  • MEMS Micro-Electro-Mechanical System
  • VCM voice coil motor
  • SMA shape memory alloy
  • the reflective element 62 can be driven to translate along the z-axis by the reflective element actuator, thereby changing the focal length of the camera module. Therefore, the focal length of the camera module is easy to control, and the optical performance is stable.
  • the reflective element 62 includes a flexible mirror
  • the focus adjustment assembly includes: a second reflective element actuator, the second reflective element actuator connected with the reflective element 62 .
  • the second reflective element actuator is used to apply pressure to the flexible reflective mirror. As shown in (a), (b), and (c) of FIG. 9 , the reflective element 62 will be deformed, so that it can be adjusted The curvature of the reflecting surface, which in turn changes the focal length of the system.
  • the flexible lens can be a MEMS micro-deformable mirror, a piezoelectrically driven flexible lens with a reflective film, an electromagnetically driven flexible mirror, and the like.
  • the second light-reflecting element actuator can be driven by various types of forces, such as piezoelectric driving, mechanical force driving, fluid pressure driving, electromagnetic driving, and the like.
  • zooming can be achieved by adjusting the position or deformation of the reflective element without changing other structures of the camera module, which is convenient for control.
  • the camera module further includes: an anti-shake assembly, for example, the anti-shake assembly is connected to at least one of the reflective element 62 and the light splitting element 61 , and the anti-shake assembly can be used for Shake compensation for the beam.
  • an anti-shake assembly for example, the anti-shake assembly is connected to at least one of the reflective element 62 and the light splitting element 61 , and the anti-shake assembly can be used for Shake compensation for the beam.
  • the embodiments of the present application describe the principle of jitter compensation of the camera module based on the above-mentioned internal coordinate system.
  • the anti-shake component controls the optical device to move along the jitter direction according to the jitter direction of the imaging beam received by the optical device to which it is connected. The direction is shifted to compensate for the shaking of the imaging beam in the shaking direction.
  • the anti-shake component connected to the optical device controls it to move in the positive direction of the x-axis; when the dithering direction of the imaging beam received by the optical device is around y
  • the anti-shake component connected to the optical device can control the optical device to move in the positive direction of the y-axis to compensate for the jitter equivalently.
  • the anti-shake component can control the optical device to rotate counterclockwise along the y-axis to compensate for the jitter equivalently; when the optical device receives When the jitter direction of the imaging beam is clockwise around the x-axis, the anti-shake component can control it to rotate clockwise along the x-axis to compensate for the jitter equivalently; when the jitter direction of the imaging beam received by the optical device is around When the x-axis rotates counterclockwise, the anti-shake component can control it to rotate counterclockwise around the x-axis to compensate for the jitter equivalently.
  • the z-axis is parallel to the first optical axis O
  • the x-axis is perpendicular to the z-axis and is parallel to the second optical axis O'
  • the y-axis is perpendicular to the z-axis and is perpendicular to the height direction of the mirror group.
  • Example 1 to Example 6 are used as examples for description below.
  • the camera module includes: a first lens group 601 , a light splitting element 61 , a second lens group 602 , a reflective element 62 , a third lens group 603 , and an image sensor 63 , and focus adjustment components.
  • the first lens group 601 is located on the object side of the beam splitting element 61
  • the second lens group 602 is located between the beam splitting element 61 and the reflective element 62
  • the third lens group 603 is located between the beam splitting element 61 and the image sensor 63 .
  • the reflective element 62, the second lens group 602, the light splitting element 61, the third lens group 603, and the image sensor 63 are arranged in sequence along the first optical axis O, the first lens group 601 is located above the light splitting element 61, and the first lens group 601 passes through
  • the second optical axis O' is arranged through the second optical axis O', and the second optical axis O' is perpendicular to the first optical axis O.
  • the first lens group 601 is composed of, for example, a fixed-focus lens 6001 and a zoom lens 6002, and the focal length of the lens group 60 is variable.
  • the second lens group 602 and the third lens group 603 are composed of two fixed-focus lenses 6001, respectively.
  • the focal length adjustment assembly includes: a zoom lens actuator connected to the zoom lens 6002, and the zoom lens causes The actuator is used to change the optical power of the zoom lens.
  • the zoom lens 6002 may be a liquid lens or a flexible lens.
  • the zoom lens 6002 is a liquid lens, and its focal length can be changed by changing the optical power of the liquid surface.
  • the liquid lens may specifically be one of an electro-wetting liquid lens, an acoustic radiation pressure liquid lens, a hydraulic pressure-driven liquid lens, and a dielectrophoretic liquid lens. This application takes the electrowetting liquid lens as an example for description.
  • the zoom lens 6002 includes: a first liquid 6005 capable of conducting electricity and a second liquid 6006 that is insulating, and a container 6003 containing the first liquid 6005 and the second liquid 6006, wherein the first liquid 6005 and the second liquid 6006 are immiscible with each other, and the refractive indices of the first liquid 6005 and the second liquid 6006 are different.
  • the first liquid 6005 may be an inorganic salt aqueous solution
  • the second liquid 6006 may be silicone oil
  • the container 6003 includes, for example, a transparent tube and a cover plate, wherein the inner side wall and the cover plate of the transparent tube are coated with a hydrophobic material 6004, and the bottom wall of the transparent tube is not covered with the hydrophobic material 6004, so that the first liquid 6005 is at the surface tension level. Under the action, it is bent to the bottom wall of the transparent tube to form a hemispherical shape.
  • Electrodes 6007 are provided on the side walls of the container 6003 . As shown in FIG. 10c, when a voltage is applied to the electrode 6007, an electric field is generated around the first liquid 6005 and the second liquid 6006. Under the action of the electric field, the shape of the interface between the first liquid 6005 and the second liquid 6006 will change. The change causes the liquid surface refractive power of the first liquid 6005 to change, thereby changing the focal length of the liquid lens 6002 .
  • the electrode 6007 can be used as a zoom lens actuator to change the optical power of the electrowetting liquid lens.
  • the liquid lens is used as the zoom lens in the lens group 30, which has small size and fast zoom response, reduces the space occupied by the camera module, and is beneficial to the miniaturization of the terminal device.
  • the zoom lens 6002 adopts a flexible lens.
  • the flexible lens is made of flexible material.
  • a zoom lens actuator can be used to apply force to the flexible material to deform it, thereby changing the focal length of the flexible material.
  • the zoom lens actuator may be driven by various types of forces, such as piezoelectric driving, mechanical force driving, fluid pressure driving, electromagnetic driving, and the like.
  • Figures 10d and 10e take the piezoelectric driving structure as an example.
  • the zoom lens 6002 includes: a base 6008, a flexible lens 6009, and a piezoelectric ceramic 6010 disposed on the periphery of the flexible lens 6009, wherein the piezoelectric ceramic 6010 can apply different Force, the surface shape of the flexible lens 6009 will be changed by the force, and then the zoom function can be achieved.
  • the zoom lens 6002 is formed by the cooperation of the light-transmitting lens 11, the flexible lens 6009 and the piezoelectric ceramic 6010.
  • the piezoelectric ceramic 6010 can be used as a zoom lens actuator to change the surface shape of the flexible lens 6009 to obtain different optical powers. Equivalent to the change of the focal length of the lens, the zoom function is realized.
  • the flexible lens is used as the zoom lens in the lens group 30, which can change the focal length of the camera module, has fast response speed, and is small in size, reduces the space occupied by the camera module, and is beneficial to the miniaturization of the terminal device.
  • the reflective element 62 employs a flexible mirror.
  • the focus adjustment assembly further includes: the focus adjustment assembly further includes: a second reflection element actuator connected with the reflection element, the second reflection element actuator is connected with the reflection element.
  • the second reflective element actuator is used for applying pressure to the flexible reflective mirror, so that the reflective element is deformed, so that the curvature of the reflective surface can be adjusted, thereby changing the focal length of the system.
  • the flexible lens can be a MEMS micro-deformable mirror, a piezoelectrically driven flexible lens with a reflective film, an electromagnetically driven flexible mirror, and the like.
  • the second light-reflecting element actuator can be driven by various types of forces, such as piezoelectric driving, mechanical force driving, fluid pressure driving, electromagnetic driving, and the like.
  • FIG. 11a takes as an example that the flexible reflector is a MEMS micro-deformable reflector.
  • the reflective element 62 includes: a micro-deformable mirror 621 , an upper electrode 622 , a lower electrode 623 , and a first connecting member 625 for supporting the upper electrode 622 and the lower electrode 623 .
  • the micro-deformable mirror 621 is connected to the upper electrode 622 through the second connecting member 624 .
  • the upper electrode 622 can serve as the actuator of the second light-reflecting element.
  • the heterogeneous charges generated on the upper electrode 622 and the lower electrode 623 are attracted by the upper electrode 622 and the lower electrode 623 under the action of the heterogeneous charges.
  • the second connecting member 624 drives part of the mirror surface of the micro-deformation mirror 621 to move vertically, changing the surface shape of the micro-deformation mirror 621 to obtain different curvatures, which is equivalent to changing the focal length of the lens.
  • the upper electrode 622 , the lower electrode 623 and the second connecting member 624 are in one group, the second connecting member 624 can be connected to the center of the micro-deformable mirror 621 , and the upper electrode 622 is under the action of the electric field force When deformation occurs, the center of the micro-deformation mirror 621 can be driven to move by the second connecting member 624 to change the surface shape of the micro-deformation mirror 621 .
  • the upper electrode 622, the lower electrode 623 and the second connecting member 624 are, for example, three groups.
  • the three groups of the upper electrode 622 and the lower electrode 623 can work independently.
  • the voltage between the electrode 622 and the lower electrode 623 causes the upper electrode 622 to be deformed under the action of the electric field force, and can drive the center of the micro-deformation mirror 621 to move through the second connector 624 to change the surface of the micro-deformation mirror 621 shape.
  • Figures 11b and 11c illustrate the use of a piezoelectrically driven flexible lens with a reflective film as an example for the flexible reflector.
  • the reflective element 62 includes: a base 626, a flexible lens 627, a reflective film 629 disposed on the surface of the flexible lens 627, and a piezoelectric ceramic 628 disposed on the periphery of the flexible lens 627, wherein the piezoelectric ceramic 628 can act on current
  • the shape of the surface of the flexible lens 627 will be changed by the force, so that the zoom function can be achieved.
  • the zoom lens 6002 is formed by the cooperation of the light-transmitting lens 11, the flexible lens 627 and the piezoelectric ceramic 628.
  • the piezoelectric ceramic 628 can be used as a zoom lens actuator to change the surface shape of the flexible lens 627 to obtain different curvatures, equivalent to The zoom function is realized due to the change of the focal length of the lens.
  • the reflective element 62 includes: a base 626, a flexible lens 627, a reflective film 629 disposed on the surface of the base 626, and a piezoelectric ceramic 628 disposed on the periphery of the flexible lens 627, wherein the piezoelectric ceramic 628 can be driven by a current Different forces are applied to the flexible lens 627, and the surface shape of the flexible lens 627 will be changed by the force, so that the zoom function can be achieved.
  • the zoom lens 6002 is formed by the cooperation of the light-transmitting lens 11, the flexible lens 627 and the piezoelectric ceramic 628.
  • the piezoelectric ceramic 628 can be used as a zoom lens actuator to change the surface shape of the flexible lens 627 to obtain different curvatures, equivalent to The zoom function is realized due to the change of the focal length of the lens.
  • FIG. 11d illustrates by taking an example of an electromagnetically driven flexible mirror as the flexible mirror.
  • the reflective element 62 includes a flexible lens 6200 , a link 6201 connected with the flexible lens 6200 , and a coil 6202 for driving the link 6201 to move.
  • the connecting rod 6201 can be driven to move by applying a voltage to the coil 6202, and the other end of the connecting rod 6201 is bonded to the back of the flexible lens 6200.
  • the lens 627 is subjected to force, the surface shape of the lens 627 will change, so that the zoom function can be achieved.
  • the camera module has a fast response and a wide zoom range.
  • the beam splitting element 61 is a transflective beam splitter prism, as shown in FIG. 12 b , when the incident light passes through the beam splitter surface 611 , half of the light is transmitted and half of the light is reflected. Then, the reflected part of the light passing through the light splitting element 61 for the first time is emitted from the left along the axis, passes through the second lens group 602 , and is reflected at the reflective surface of the reflective element 62 .
  • the light will pass through the second lens group 602 for the second time, and then pass through the light splitting element 61 for the second time. As shown in Figure 12b, half of the light will still pass through the light splitting surface 611, and this part of the light will pass from the right edge z
  • the shaft passes out, passes through the third lens group 603 , and finally forms an image on the image sensor 63 .
  • This process can be expanded into an equivalent optical path as shown in Fig. 12b.
  • the image size of the optical system is 4.2mm
  • the focal length of the 1X lens is 2.6mm
  • the corresponding field of view is 78°.
  • the 2X mode in Table 1 that is, the 2x telephoto mode, means that in this mode, the ratio of the optical focal length to the shortest focal length is 2.
  • the 20mm macro mode means that you can shoot objects 20mm away from the lens.
  • FIG. 12a is a simulation diagram of the camera module in the 2X telephoto mode
  • (b) in Fig. 12a is a simulation diagram of the camera module in the 3X telephoto mode
  • (c) in Fig. 12a ) is the simulation diagram of the camera module in macro mode.
  • the focal lengths of the first lens group 601, the second lens group 602, and the third lens group 603 are different.
  • the position of the reflective element 62 does not change, and the focal length is different.
  • the present invention adds a beam splitting prism and a reflector, folds the optical path twice, realizes a periscope reentrant form, improves space utilization, makes the structure more compact, and is easier to apply in mobile phones.
  • the camera module provided in this example can take into account both wide infinity zoom and focusing at different object distances.
  • One module implements the functions of multiple fixed-focus modules, reducing the number of cameras.
  • variable curvature mirrors small changes in curvature can bring about large changes in focal length.
  • focusing and optical image stabilization can be achieved by driving a reflective element 62 . Control is more direct and quick.
  • the camera module includes: a first lens group 601 , a light splitting element 61 , a second lens group 602 , a reflective element 62 , a third lens group 603 , and an image sensor 63 , and focus adjustment components.
  • Example 1 The difference from Example 1 is that the reflective element 62 is a curved mirror with a variable position and a fixed curvature.
  • the focal length adjusting assembly includes: a first reflective element actuator connected with the reflective element, and the first reflective element actuator is connected with the reflective element.
  • the camera module provided by the embodiment of the present application has an internal coordinate system
  • the internal coordinate system is, for example, a three-dimensional coordinate system
  • the internal coordinate system includes: the axis with the image sensor 63 and the reflective element 62 A parallel z-axis, an x-axis perpendicular to the z-axis and parallel to the height direction of the mirror group, and a y-axis perpendicular to the z-axis and perpendicular to the height direction of the mirror group.
  • the first light-reflecting element actuator is used for driving the first light-reflecting element to translate along the z-axis, so that the position of the first light-reflecting element changes.
  • the first reflective element actuator may be a motor, and the reflective element 62 may be driven by the motor to translate along the z-axis, thereby changing the focal length of the camera module. Therefore, the focal length of the camera module is easy to control, and the optical performance is stable.
  • three modes of 2x telephoto, 3x telephoto, and macro can be realized by adjusting the position of the reflective element 62 .
  • the image size of the optical system is 4.2mm
  • the focal length of the 1X lens is 2.6mm
  • the corresponding field of view is 78°.
  • FIG. 14 shows a working state diagram of the camera module in different camera modes.
  • FIG. 14 is a simulation diagram of the camera module in the 2X telephoto mode
  • (b) in Figure 14 is a simulation diagram of the camera module in the 3X telephoto mode
  • (c) in Figure 14 ) is the simulation diagram of the camera module in macro mode.
  • the focal length of the first lens group 601 is different.
  • the focal length of the reflective element 62 does not change, and the distance between the reflective element 62 and the lens group 602 changes.
  • the position-fixed curvature curved mirror in the first embodiment is changed to a position-variable and fixed-curvature curved mirror, which can be driven by a micro-stepping motor, and the process is mature and easier to implement.
  • the camera module includes: a first lens group 601 , a light splitting element 61 , a second lens group 602 , a reflective element 62 , a third lens group 603 , and an image sensor 63 , focusing components and anti-shake components.
  • a first lens group 601 a light splitting element 61
  • a second lens group 602 a second lens group 602
  • a reflective element 62 a third lens group 603
  • an image sensor 63 focusing components and anti-shake components.
  • focusing components for the specific structure of the focusing assembly, reference may be made to the above-mentioned example 1 and example 2, and this example describes the specific form of the anti-shake assembly.
  • the anti-shake assembly is connected to, for example, the reflective element 62, and the anti-shake assembly can be used to perform jitter compensation on the light beam.
  • the anti-shake assembly includes: a reflective element actuator, the reflective element actuator is connected to the reflective element 62, and the reflective element actuator is used to drive the reflective element 62 to move, so as to align the imaging beam A first shake compensation is performed.
  • the reflective element 62 may translate along the first optical axis O and the first rotation axis when driven by the anti-shake component, or around the first optical axis O and the first rotation axis when driven Rotation is generated in the direction of a rotation axis, or translation and rotation are simultaneously generated in the x-axis and y-axis directions when driven, so as to achieve the purpose of optical image stabilization.
  • the first optical axis O is parallel to the X axis in the figure
  • the first rotation axis is a rotation axis perpendicular to the first optical axis and the second optical axis
  • the first rotation axis is parallel to the figure in the Y-axis.
  • the reflective element actuator can be realized by Micro-Electro-Mechanical System (MEMS) actuator technology, also can be realized by voice coil motor (VCM) technology, and can also be realized by shape memory technology. Alloy (shape memory alloy, SMA) motor technology realization.
  • MEMS Micro-Electro-Mechanical System
  • VCM voice coil motor
  • SMA Alloy (shape memory alloy, SMA) motor technology realization.
  • the interaction between the magnetic field of the permanent magnet steel and the magnetic field generated by the energized coil conductor can be used to control the regular movement of the reflective element 62.
  • the magnetic field can control the magnitude of the electromagnetic force on the x-axis and the y-axis, and then adjust the The position and angle of the reflective element 62 .
  • the z-axis is parallel to the axes of the image sensor 63 and the reflective element 62
  • the x-axis is perpendicular to the z-axis and is parallel to the height direction of the mirror group
  • the y-axis is perpendicular to the z-axis and is parallel to the mirror group
  • the height direction is vertical.
  • the reflective element actuator may be an electrostatic actuator, an electromagnetic actuator, an electrothermal actuator, or a piezoelectric actuator, or the like.
  • the actuating member When the actuating member is an electrostatic actuating member, the actuating member can drive the reflective element 62 to move by adjusting the electrostatic force loaded.
  • the actuating member When the actuating member is an electromagnetic actuating member, the actuating member can drive the reflective element 62 to move by adjusting the positive and negative magnetic properties.
  • the actuator When the actuator is an electrothermal actuator, the actuator can control the movement of the reflective element 62 by adjusting the temperature.
  • the actuator When the actuator is a piezoelectric actuator, the actuator can drive the reflective element 62 to move by adjusting the intensity of the applied electric field.
  • the terminal further includes: a shake detection structure, which can be integrated on the reflective element 62, and when the shake detection structure is integrated on the reflective element 62, the shake detection structure does not need to be installed separately, The overall installation process of the camera module can be simplified.
  • the jitter detection structure may be a gyroscope provided inside the terminal.
  • the shake detection structure includes at least one image shake sensor.
  • the image shaking sensor can accurately capture the image in the photosensitive area before the reflective element 62, so that the shaking direction and amount of the captured image can be predicted, and then Shake compensation.
  • the terminal further includes: a first controller, where the first controller is respectively connected to the shake detection structure and the reflective element actuator.
  • the first controller is configured to acquire a first shake direction and a first shake amount of the imaging beam detected by the shake detection structure, and determine a first shake compensation direction and a first shake compensation displacement based on the first shake direction and the first shake amount , based on the first shake compensation direction and the first shake compensation displacement, the light-reflecting element actuating structure is controlled to drive the light-reflecting element 62 to move the first shake compensation displacement along the first shake compensation direction.
  • the shake detection structure detects the first shake direction and the first shake amount of the imaging beam, and the first controller obtains the first shake direction and the first shake detected by the shake detection structure.
  • the first shake amount, and the first shake compensation direction and the first shake compensation displacement are determined according to the first shake direction and the first shake amount, and then the reflective element actuating structure is controlled to drive the reflective element 62 to move the first shake compensation direction along the first shake compensation direction.
  • the first shake compensation direction may include at least one direction in the above-mentioned internal coordinate system, and the first shake compensation displacement includes a one-to-one compensation displacement corresponding to the at least one direction, which may be a linear displacement or an angular displacement.
  • the camera module includes: a first lens group 601 , a light splitting element 61 , a second lens group 602 , a reflective element 62 , a third lens group 603 , and an image sensor 63 , a focusing assembly and an anti-shake assembly, wherein, for the specific structure of the focusing assembly, reference may be made to the above-mentioned example 1 and example 2, and this example describes the specific form of the anti-shake assembly.
  • the anti-shake assembly is connected to the spectroscopic element 61 , and the anti-shake assembly includes, for example, a spectroscopic element actuator.
  • the spectroscopic element actuator is connected to the spectroscopic element 61, and the spectroscopic element actuator is used to drive the light-reflecting element 62 to move, so as to perform jitter compensation for the imaging beam.
  • the actuation structure of the light splitting element 61 can drive the light splitting element 61 to move in various directions.
  • the direction can be the x-axis direction, the y-axis direction of the camera module's internal coordinate system, and the moving and surrounding directions of the camera module.
  • the spectroscopic element actuator can be realized by Micro-Electro-Mechanical System (MEMS) actuator technology, also can be realized by voice coil motor (VCM) technology, and can also be realized by shape memory technology. Alloy (shape memory alloy, SMA) motor technology realization.
  • the actuator may be an electrostatic actuator, an electromagnetic actuator, an electrothermal actuator, or a piezoelectric actuator, or the like.
  • the actuating member When the actuating member is an electrostatic actuating member, the actuating member can drive the movable stage to move in the groove by adjusting the electrostatic force loaded.
  • the actuating member When the actuating member is an electromagnetic actuating member, the actuating member can drive the movable stage to move in the groove by adjusting the positive and negative of the magnetism.
  • the actuating member When the actuating member is an electrothermal actuating member, the actuating member can control the driving movable stage to perform movement in the groove by adjusting the temperature.
  • the actuator When the actuator is a piezoelectric actuator, the actuator can drive the movable stage to move in the groove by adjusting the intensity of the applied electric field.
  • the terminal further includes: a jitter detection structure, which can be integrated on the spectroscopic element 61, when the jitter detection structure is integrated on the spectroscopic element 61, the jitter detection structure does not need to be installed separately, The overall installation process of the camera module can be simplified.
  • the jitter detection structure may be a gyroscope provided inside the terminal.
  • the anti-shake assembly further includes: a second controller, where the second controller is respectively connected to the jitter detection structure and the light splitting element actuator.
  • the first controller is configured to perform a second jitter compensation control process, that is, to acquire a second jitter direction and a second jitter amount of the imaging beam detected by the jitter detection structure, and based on the second jitter direction and the second jitter
  • the second shake compensation direction and the second shake compensation displacement are determined based on the second shake compensation direction and the second shake compensation displacement, and the splitter element actuator is controlled to drive the splitter element to move the second shake compensation displacement along the second shake compensation direction.
  • the shake detection structure detects the second shake direction and the second shake amount of the imaging beam
  • the second controller obtains the first shake direction and the second shake amount detected by the shake detection structure.
  • the second shaking amount and determining the second shaking compensation direction and the second shaking compensation displacement according to the second shaking direction and the second shaking amount, and then controlling the beam splitting element actuator to drive the beam splitting element to move the second shaking along the second shaking compensation direction Compensate for displacement.
  • the second shake compensation direction may include at least one direction in the above-mentioned internal coordinate system
  • the second shake compensation displacement includes a one-to-one compensation displacement corresponding to the at least one direction, which may be a linear displacement or an angular displacement.
  • the camera module includes: a first lens group 601 , a light splitting element 61 , a second lens group 602 , a reflective element 62 , a third lens group 603 , an image sensor 63 , a focusing component and an anti-shake component.
  • the specific structure of the focusing assembly may refer to the above-mentioned example 1 and the second example, and the specific structure of the anti-shake assembly may refer to the above-mentioned example 3 and the fourth example.
  • This example describes one form of the spectroscopic element 61 .
  • the light splitting element 61 includes, for example, a first right-angle prism 610 and a second right-angle prism 612 , and the angle between the inclined plane and the right-angle plane of the first right-angle prism 610 and the second right-angle prism 612 is both 45°.
  • an optical film layer is provided on the inclined surface of the first right angle prism 610 .
  • the optical film layer is a polarizing beam splitter film
  • the optical module 6 further includes: a quarter-wave plate, the quarter-wave plate is disposed on the reflective element 62 and the reflective element 62 and the between the light splitting elements 61 .
  • the polarizing beam splitter can split the incident unpolarized light into two polarized lights with different polarization directions.
  • the coordinate system used is defined by the plane containing the input and reflected beams. If the polarization vector of the light is in this plane, it is called P-polarized light, and if the polarization vector is perpendicular to this plane, it is called S-polarized light. Either input polarization state can be represented as the vector sum of the s and p components.
  • the P-polarized light is completely transmitted, and the S-polarized light is reflected at an angle of 45 degrees.
  • the polarization direction changes by 45°, and then is reflected by the light-reflecting element 62, and its polarization state remains unchanged.
  • FIG. 17 shows the polarization state of the reflected light.
  • the light reflected by the reflective element 62 passes through a quarter-wave plate, and the polarization direction increases by 45° to become P light, so it is polarized again.
  • the beam splitter does not reflect, but completely transmits, and finally forms an image at the photosensitive element. It can be seen that only 50% of the light is lost in this scheme.
  • the camera module includes: a first lens group 601 , a light splitting element 61 , a second lens group 602 , a reflective element 62 , a third lens group 603 , an image sensor 63 , a focusing component and an anti-shake component.
  • the specific structure of the focusing assembly may refer to the above-mentioned example 1 and the second example, and the specific structure of the anti-shake assembly may refer to the above-mentioned example 3 and the fourth example.
  • This example describes another form of the spectroscopic element 61 .
  • the light splitting element 61 includes, for example, a first right angle prism 610 and a second right angle prism 612, and the angle between the inclined plane and the right angle plane of the first right angle prism 610 and the second right angle prism 612 is both 45°.
  • an optical film layer is provided on the inclined surface of the first right angle prism 610 .
  • the optical film layer is a non-polarizing beam splitter film.
  • the optical film layer is a non-polarizing beam splitter film.
  • the reflected light is the first When passing through the light splitting surface 611, half of the light is reflected, half of the light is transmitted, and finally there will be a 75% light loss.
  • Non-polarizing beamsplitters do not lose polarized light information in incident light.
  • a polarizing beam splitting film layer or a non-polarizing beam splitting film layer can be used on the beam splitting surface 611 of the beam splitting element 61.
  • Those skilled in the art can select a suitable beam splitting film layer according to the usage scene, which is not covered in this application. Limitations, these all belong to the protection scope of the present application.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Studio Devices (AREA)

Abstract

Sont divulgués dans les modes de réalisation de la présente invention un module de lentille, un module de caméra et un terminal. Le module de lentille comprend : un ou plusieurs groupes de lentilles, et un élément réfléchissant la lumière et un élément de division de la lumière qui sont disposés de manière séquentielle le long d'un premier axe optique, un ou plusieurs groupes de lentilles étant agencés séparément sur un côté objet de l'élément de division de lumière le long d'un second axe optique, ou agencés entre l'élément de division de lumière et l'élément réfléchissant la lumière le long du premier axe optique, ou agencés sur le côté de l'élément de division de lumière à l'opposé de l'élément réfléchissant la lumière le long du premier axe optique ; l'élément de division de lumière comprend une surface de séparation de lumière, un angle inclus entre la surface de division de lumière et le premier axe optique étant supérieur à 0° et inférieur à 90° ; et l'élément de division de lumière est utilisé pour diviser le faisceau lumineux, qui est incident sur la surface de division de lumière à partir du côté objet le long du second axe optique, deux fois de façon à former un premier faisceau lumineux de transmission. L'élément de division de lumière et l'élément réfléchissant la lumière sont combinés pour obtenir le pliage d'un trajet de lumière, ce qui facilite une réduction de la taille du module de lentille pour obtenir la miniaturisation du terminal.
PCT/CN2021/113094 2020-08-19 2021-08-17 Module de lentille, module de caméra et terminal WO2022037591A1 (fr)

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