CN113630527A

CN113630527A - Light filtering assembly, camera module, electronic equipment and shooting method

Info

Publication number: CN113630527A
Application number: CN202010382102.XA
Authority: CN
Inventors: 简坤胜
Original assignee: Nanchang OFilm Optoelectronics Technology Co Ltd
Current assignee: Nanchang OFilm Optoelectronics Technology Co Ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2021-11-09

Abstract

The invention relates to a light filtering component, a camera module, electronic equipment and a shooting method, wherein the light filtering component comprises: the bracket is used for being fixedly connected with the photosensitive assembly; the optical filter is provided with a first area and a second area, wherein the first area is used for filtering light rays outside a first wave band, and the second area is used for filtering light rays outside a second wave band; the filter can be movably arranged on the bracket so as to enable the filter to have a first position and a second position relative to the bracket; the arrangement directions of the first position and the second position are parallel to the arrangement directions of the first area and the second area, so that when the optical filter is located at the first position, light rays with a first wavelength reflected from the first area of the target object can be transmitted to the photosensitive assembly, and when the optical filter is located at the second position, light rays with a second wavelength reflected from the first area of the target object can be transmitted to the photosensitive assembly. Therefore, the camera module using the filtering component can realize the shooting function of the existing double-camera module by using one lens component at low cost.

Description

Light filtering assembly, camera module, electronic equipment and shooting method

Technical Field

The invention relates to the technical field of cameras, in particular to a light filtering component, a camera module, electronic equipment and a shooting method.

Background

In order to improve the imaging quality of the camera module, each manufacturer has set up two or more cameras in the camera module at present, for example two camera modules, many camera modules etc. wherein, these camera modules include two or more independent cameras, each camera all has corresponding camera lens subassembly, light filter and sensitization chip, this kind of mode of setting improves the cost of whole camera module, the electronic equipment's that leads to having used this camera module price is higher, can not satisfy consumers' demand in general.

Disclosure of Invention

Therefore, it is necessary to provide a camera module, an electronic device, and a shooting method, which are used to solve the problem of high cost of the camera module due to the fact that the existing camera module is provided with two or more cameras to improve the imaging quality.

A light filtering component used for being connected with a photosensitive component of a camera module so as to filter stray light emitted to the photosensitive component from a target object, comprising: the bracket is fixedly connected with the photosensitive assembly; the optical filter is provided with a first area and a second area, the first area is used for filtering light rays outside a first wave band, and the second area is used for filtering light rays outside a second wave band; the optical filter can be movably arranged on the bracket so that the optical filter has a first position and a second position relative to the bracket; the arrangement directions of the first position and the second position are parallel to the arrangement directions of the first area and the second area, so that when the optical filter is located at the first position, light rays with a first wavelength reflected from the first area of the target object can be transmitted to the photosensitive assembly, and when the optical filter is located at the second position, light rays with a second wavelength reflected from the first area of the target object can be transmitted to the photosensitive assembly.

In the invention, when the optical filter is located at the first position, the light ray with the first wavelength reflected from the first area of the target object can be transmitted to the photosensitive assembly, and when the optical filter is located at the second position, the light ray with the second wavelength reflected from the first area of the target object can be transmitted to the photosensitive assembly. When the light filtering component is applied to the camera module, the photosensitive component can form images respectively according to the light of the first wave band and the light of the second wave band reflected from the same position of the target object. During subsequent processing, the image of the region formed according to the first waveband light and the image formed according to the second waveband light can be fused, so that the imaging of the region in the final image simultaneously integrates the advantages of imaging according to the first waveband and the advantages of imaging according to the second waveband.

In other words, the camera module can utilize one lens assembly to realize the shooting function of the existing double-camera module, and the existing double-camera module is provided with two lens assemblies and two photosensitive chips, so that the camera module provided by the invention has smaller volume and lower cost compared with the existing double-camera module.

Further, the first zones and the second zones are alternately arranged in sequence, and the size of the first zones in the arrangement direction of the first zones and the second zones is the same as the size of the second zones. Therefore, the distance of the movement of the optical filter is equal to the width of the first area each time, the position exchange of the projection area of the light rays transmitted from the first area on the photosensitive chip and the projection area of the light rays transmitted from the second area on the photosensitive chip can be ensured, and the subsequent processing of the first image and the second image can be facilitated.

Further, the support has first surface, second surface, and well cavity, the first surface with the second surface sets up back to back, well cavity by the first surface runs through to the second surface, be equipped with support piece on the lateral wall of well cavity, the light filter sets up slidable on the support piece. The light shading environment can be provided through the support, light is prevented from being transmitted to the optical filter from other positions, meanwhile, the optical filter can be protected through the support, and the service life of the optical filter is prolonged.

Further, the optical filter comprises an optical filter part, and the first area and the second area are both located in the optical filter part, wherein in a first direction, the first area and the second area are fully distributed in the optical filter part; in the second direction, the first areas and the second areas are alternately arranged in sequence in the first direction; the second direction is the arrangement direction of the first area and the second area, and the first direction is perpendicular to the second direction, so that subsequent processing of the first image and the second image can be facilitated.

Furthermore, the optical filter also comprises a light-tight connecting part, the connecting part is arranged on the outer side of the optical filter part, and the adverse effect of stray light on imaging of the camera module can be reduced through the connecting part.

Further, the light filtering component further comprises a driving piece, the driving piece is connected with the connecting portion and used for driving the light filter to be opposite to the position of the support between the first position and the second position, so that the driving piece can be prevented from generating adverse effects on the performance of the light filter, and meanwhile, light can be prevented from penetrating through the light filter from an area outside the light filtering portion.

Furthermore, the driving member comprises a first magnetic unit and a second magnetic unit, the first magnetic unit is connected with the bracket, and the second magnetic unit is connected with the optical filter; at least one of the first magnetic unit and the second magnetic unit is an electromagnetic unit, so that the first magnetic unit and the second magnetic unit can attract or repel each other, and the optical filter is driven to move relative to the bracket. Therefore, the driving piece can be arranged more simply, and the camera module is convenient to produce and assemble.

Furthermore, the driving part comprises a mounting seat which is slidably arranged on the bracket, and the optical filter is fixed on the mounting seat, so that the optical filter and the driving part can be more conveniently mounted.

Further, the optical filter comprises an optical filter part, and the first area and the second area are both located in the optical filter part, wherein in a first direction, the first area and the second area are fully distributed in the optical filter part; in the second direction, the first areas and the second areas are alternately arranged in sequence in the first direction; the second direction is the arrangement direction of the first area and the second area, the first direction is perpendicular to the second direction, and the first direction and the second direction are both perpendicular to the axis of the hollow cavity. When the camera module is assembled, the lens component is directly arranged on the first surface of the support, so that the optical filter and the lens component are opposite, and the camera module is more convenient to assemble.

Further, the supporting piece comprises a first supporting part and a second supporting part, and the first supporting part and the second supporting part are both arranged on the side wall of the hollow cavity; the first supporting part is provided with a first open slot, the second supporting part is provided with a second open slot, and an opening of the first open slot and an opening of the second open slot are oppositely arranged to form an installation space; the mounting seat is mounted in the mounting space and can slide in the mounting space; wherein, mount pad one end set up in the first open slot, the other end is located in the second open slot, can make support piece's setting more simple and convenient like this.

Furthermore, in the axial direction of the hollow cavity, the width of the first opening groove is equal to that of the mounting seat, so that the mounting seat can slide in the opening groove, and the mounting seat can be prevented from jumping on the optical axis. And/or in the axial direction of the hollow cavity, the width of the second open slot is equal to that of the mounting seat, so that the mounting seat can slide in the open slot and can be prevented from jumping on the optical axis. And/or the first supporting part and the second supporting part are arranged in the same structure, so that the supporting frame can be arranged more simply.

A camera module, comprising: a lens assembly; the photosensitive assembly is opposite to the lens assembly and used for receiving the light projected from the lens assembly to perform imaging; and the light filtering component is respectively connected with the lens component and the photosensitive component, is positioned between the lens component and the photosensitive component and is used for filtering stray light emitted to the photosensitive component, wherein the light filtering component is any one of the light filtering components, and the first direction and the second direction are both vertical to the optical axis of the lens component. Through setting up like this, the module of making a video recording can utilize a lens subassembly to realize the shooting function of current two camera modules, and has two lens subassemblies and two sensitization chips in the current two camera modules, so the module of making a video recording that this embodiment provided compares in current two camera modules that the volume is littleer, the cost is lower.

An electronic device, comprising: a camera module as described in any of the above; and the controller is electrically connected with the camera module and is used for fusing a first image obtained by the photosensitive chip when the optical filter is positioned at the first position with a second image obtained by the optical filter at the second position to form a third image. Utilize a camera lens subassembly to realize the shooting function of current two camera modules like this, and have two camera lens subassemblies and two sensitization chips in the current two camera modules, so can reduce electronic equipment's volume and cost.

Furthermore, the electronic equipment further comprises a light-emitting module, wherein the light-emitting module is connected with the controller and used for projecting light rays of a first wave band and light rays of a second wave band to the target object, so that the shooting effect of the electronic equipment can be improved.

A shooting method for shooting a target object by using the camera module group comprises the following steps: when the optical filter is located at a first position, the photosensitive chip obtains a first image according to the light projected from the optical filter; controlling the optical filter to move to a second position, and acquiring a second image obtained by the photosensitive chip according to the light projected from the optical filter; and fusing the first image and the second image to obtain a third image. Utilize a camera lens subassembly to realize the shooting function of current two camera modules like this, and have two camera lens subassemblies and two sensitization chips in the current two camera modules, so can reduce electronic equipment's volume and cost.

Further, the step of fusing the first image and the second image to obtain a third image includes: extracting a first feature and a second feature in the first image, and extracting a third feature and a fourth feature in the second image; the first feature and the third feature are images obtained by the photosensitive chip according to light rays of a first wave band, and the second feature and the fourth feature are images obtained by the photosensitive chip according to light rays of a second wave band; fusing the first feature and the third feature to obtain a first fused feature and fusing the second feature and the fourth feature to obtain a second fused feature; fusing the first fused feature and the second fused feature to obtain the third image.

Drawings

Fig. 1 is a schematic rear view of an electronic device according to the present invention;

fig. 2 is a schematic cross-sectional view of a camera module of an electronic device according to the present invention;

fig. 3 is a schematic front view of a filter of a camera module of an electronic device according to the present invention;

fig. 4 is a schematic cross-sectional view of a filter of a camera module of an electronic device according to the present invention;

fig. 5 is a schematic diagram of an operating principle of the camera module of the electronic device according to the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1, in the present embodiment, the electronic device 100 includes a camera module 10 and a controller, wherein the controller is electrically connected to the camera module 10 and can control the operation of the camera module 10. Wherein module 10 of making a video recording can play the function of two camera modules, and module 10 of making a video recording can form images according to the light of first wave band and second wave band respectively promptly to can fuse the image that becomes according to the light of these two wave bands and obtain final image. In addition, in order to improve the imaging effect of the electronic device, in the embodiment, the electronic device 100 further includes a light emitting module 20, and the light emitting module 20 is connected to the controller and configured to project the light of the first wavelength band and the light of the second wavelength band to the target object. In addition, the camera module 10 may be used in combination with other camera modules. For example, in this embodiment, electronic equipment 100 has still set up long burnt module of making a video recording 30 and wide angle module of making a video recording 40, and the controller can fuse the formation of image of making a video recording module 10, long burnt module of making a video recording 30 and wide angle module of making a video recording 40 three to further improve electronic equipment 100's imaging effect.

As shown in fig. 2, in the present embodiment, the camera module 10 includes a lens assembly 10a, a photosensitive assembly 10b and a filter assembly 10c, wherein the photosensitive assembly 10b is opposite to the lens assembly 10a and is used for receiving the light projected from the lens assembly 10a to perform imaging; the filter assembly 10c is connected to the lens assembly 10a and the photosensitive assembly 10b, respectively, and is located between the lens assembly 10a and the photosensitive assembly 10b for filtering out stray light emitted to the photosensitive assembly 10 b.

As shown in fig. 2, the photosensitive assembly 10b includes a substrate 1 and a photosensitive chip 2, and the substrate 1 may be a rigid circuit board or an assembly of a flexible circuit board and a reinforcing plate. The photosensitive chip 2 is disposed on the substrate 1 and electrically connected to the circuit structure on the substrate 1. The photosensitive chip 2 is opposite to the lens assembly 10a, and the photosensitive chip 2 can receive the light projected from the lens assembly 10a for imaging.

As shown in fig. 2, the filter assembly 10c includes a holder 3 and a filter 4. The support 3 is fixedly connected with the photosensitive assembly 10b, specifically, the support 3 can be arranged on the substrate 1 by means of bonding or the like, the optical filter 4 is arranged on the support 3 and is positioned between the lens assembly 10a and the photosensitive chip 2, and the optical filter 4 is opposite to the photosensitive chip 2 at intervals by the support of the support 3. The lens assembly 10a is disposed on the surface of the support 3 away from the substrate 1, light projected from the lens assembly 10a first propagates to the optical filter 4, the optical filter 4 filters stray light in the light, so that light with corresponding wavelength passes through, and the light passing through the optical filter 4 is finally received by the optical sensor chip 2 for imaging. In addition, in the present embodiment, the filter 4 is movable relative to the support 3 so as to have a first position and a second position relative to the support 3.

As shown in fig. 2, in the present embodiment, the lens assembly 10a includes a lens holder 61 and a lens 62 mounted on the lens holder 61, wherein an optical axis of the lens 62 is an optical axis of the lens assembly 10 a. The mirror base 61 is mounted on the surface of the holder 3 remote from the substrate 1 by means of bonding or the like. In this case, the mirror base 61 may be a voice coil motor directly. Furthermore, in some embodiments, the lens holder 61 may be integrally formed with the frame 3.

As shown in fig. 2 and 3, in the present embodiment, the filter 4 has a first region 41 and a second region 42. The first region 41 can allow light rays in a first wavelength band to pass through so that the photosensitive chip 2 can perform imaging according to the light rays in the first wavelength band; the second region 42 may pass light of a second wavelength band therethrough so that the photo-sensing chip 2 performs imaging according to the light of the second wavelength band. The light of the first wavelength band may be light of a certain wavelength or light of a certain wavelength range. The light of the second wavelength band may be light of another wavelength or light of another wavelength range. For example, the light of the first wavelength band may be light of 400nm to 700nm, or light of 650nm, and the light of the second wavelength band may be light of 750nm to 1100nm, or light of 850 nm.

As shown in fig. 2, in the present embodiment, the filter assembly 10c further includes a driving member 5, and the driving member 5 is disposed on the bracket 3 and connected to the filter 4. The driving member 5 can drive the filter 4 to move according to the control instruction of the controller so as to change the position of the projection of the filter 4 on the photosensitive chip 2. Thus, the projection positions of the light ray of the first wavelength band passing through the first region 41 and the light ray of the second wavelength band passing through the second region 42 on the photosensitive chip 2 are changed, and the photosensitive chip 2 can respectively form images according to the light rays received before and after the position change of the optical filter 4.

In this embodiment, the arrangement direction of the first region 41 and the second region 42 is parallel to the arrangement direction of the first position and the second position, so that the projection area of the first region 41 on the photosensitive element 10b when the optical filter 4 is located at the second position can at least partially coincide with the projection area of the second region 42 on the photosensitive element 10b when the optical filter 4 is located at the first position; and/or the projection area of the second area 42 on the photosensitive element 10b when the filter 4 is located at the second position can at least partially coincide with the projection area of the first area 41 on the photosensitive element 10b when the filter 4 is located at the first position. Thus, when the optical filter 4 is located at the first position, the light of the first wavelength reflected from the first region of the target object can be transmitted to the photosensitive assembly 10b, and when the optical filter 4 is located at the second position, the light of the second wavelength reflected from the first region of the target object can be transmitted to the photosensitive assembly 10 b. That is, the photosensitive member 10b can perform imaging based on the light of the first wavelength band and the light of the second wavelength band reflected from the same position of the target object, respectively.

Assuming that the optical filter 4 is located at a first position before the position of the optical filter is changed and is located at a second position after the position of the optical filter 4 is changed, when the optical filter 4 is located at the first position, the photosensitive chip 2 can obtain a first image of the target object according to the light rays which penetrate through the optical filter 4 at the moment; when the filter 4 is at the second position, the photosensitive chip 2 can obtain a second image of the target object according to the light transmitted through the filter 4 at this time.

The shooting effect that can reach current two camera modules is shot through following mode in the event: when the filter 4 is located at the first position, the photosensitive chip 2 obtains a first image according to the light projected from the filter 4; then, the controller controls the optical filter 4 to move to a second position, and a second image obtained by the photosensitive chip 2 according to the light projected from the optical filter 4 at the moment is obtained; and finally, fusing the first image and the second image through the controller to obtain a third image. It can be understood that the third image is the final result of the image capturing module 10, wherein the light reflected by the first region of the target object passes through the first region 41 to be emitted to the photosensitive chip 2 when the optical filter 4 is located at the first position, and the light reflected by the first region of the target object passes through the second region 42 to be emitted to the photosensitive chip 2 when the optical filter 4 is located at the second position, so that the image of the first region in the first image is obtained according to the light of the first wavelength band, and the image of the first region in the second image is obtained according to the light of the second wavelength band, so that the image of the first region in the third image is focused on the advantages of the image according to the first wavelength band and the advantages of the image according to the second wavelength band, so that the final image capturing quality of the image capturing module 10 can be improved by this image capturing method.

Therefore, the camera module 10 provided in this embodiment can utilize one lens assembly 10a to realize the shooting function of the existing dual-camera module, and the existing dual-camera module has two lens assemblies and two photosensitive chips, so that the camera module 10 provided in this embodiment has a simpler structure, a smaller volume and a lower cost compared with the existing dual-camera module.

In addition, in this embodiment, when the image capturing module 10 starts capturing, the position of the optical filter 4 is the first position, that is, the first position does not refer to a specific position, and in this case, the second position may be a certain position or a plurality of positions after the optical filter 4 moves. In some embodiments, the first position may be a specific position, and when the camera module 10 shoots, the driving component 5 will move the optical filter 4 to the first position for shooting, and then move the optical filter to one or more second positions for shooting.

In addition, in this embodiment, the step of fusing the first image and the second image to obtain the third image includes: extracting a first feature and a second feature in the first image, and extracting a third feature and a fourth feature in the second image; the first characteristic and the third characteristic are images obtained by the photosensitive chip 2 according to light rays of a first wave band, and the second characteristic and the fourth characteristic are images obtained by the photosensitive chip 2 according to light rays of a second wave band; then, fusing the first feature and the third feature to obtain a first fused feature, and fusing the second feature and the fourth feature to obtain a second fused feature; finally, the first fused feature and the second fused feature are fused to obtain a third image. Thus, the imaging advantages of the light in the first wave band and the imaging advantages of the light in the second wave band can be combined, and the final imaging quality is improved. For example, the light of the first wavelength band may be light with a wavelength of 650nm, and the light of the second wavelength band may be light with a wavelength of 850nm, wherein the color of the image formed by the light with the wavelength of 650nm is better, and the brightness of the image formed by the light with the wavelength of 850nm is stronger, so that the third image obtained by the above method has high quality color and brightness.

In this embodiment, the number of the second positions may be one, two or more. Therefore, when the number of the second positions is larger than two, the photosensitive chip 2 can obtain two or more second images, and the controller can fuse the first image and all the second images together to obtain a third image.

As shown in fig. 3 and 4, in the present embodiment, the optical filter 4 includes a base plate 43 and a filter layer 44 disposed on the base plate 43, wherein the base plate 43 may be a transparent glass plate, a transparent resin plate, or the like. The filter layer 44 includes a first filter region 441 and a second filter region 442, a region where the bottom plate 43 is connected to the first filter region 441 is a first carrier region, the first carrier region and the first filter region 441 form a first region 41 of the filter, a region where the bottom plate 43 is connected to the second filter region 442 is a second carrier region, and the second carrier region and the second filter region 442 form a second region 42 of the filter. In addition, in the present embodiment, the filter layer 44 may be SiO plated on the base plate 43₂Film, Ti0₂Film or SiO₂-TiO₂Films, etc., in which SiO of each region of the filter layer 44₂And/or Ti0₂The first filter region 441 and the second filter region 442 are formed by different concentration densities.

As shown in fig. 3 and 4, in this embodiment, the optical filter 4 further includes a light shielding layer 45, the light shielding layer 45 is disposed on the bottom plate 43 and located outside the filter layer 44, and the light shielding layer 45 can block light from passing through, so as to reduce adverse effects of stray light on imaging of the camera module. In this embodiment, the light-shielding layer 45 may be an ink layer or the like, and in this embodiment, the filter layer 44 and the bottom plate 43 in the region in contact with the filter layer 44 form the filter portion 46 of the optical filter 4, and the light-shielding layer 45 and the bottom plate 43 in contact with the light-shielding layer 45 form the connecting portion 47 which does not transmit light. The connecting portion 47 is connected to the driver 5, so that interference of the driver with the filter portion 46 can be avoided, and light can be prevented from passing through the filter 4 from a region other than the filter portion 46 and being projected onto the photo chip 2.

As shown in fig. 3 and 4, in the present embodiment, the bottom plate 43 includes an upper surface 431 and a lower surface 432 which are oppositely arranged, and the light shielding layer 45 and the filter layer 44 are both arranged on the upper surface 431 of the bottom plate 43. When the camera module 10 is assembled, the upper surface 431 is the surface of the bottom plate 43 away from the photosensitive chip 2. In the present embodiment, the light shielding layer 45 has an annular structure and surrounds the filter layer 44, that is, in the present embodiment, the connecting portion 47 has an annular structure and surrounds the filter portion 46. In addition, in an actual product, the upper surface 431 is generally disposed perpendicular to the optical axis of the lens assembly 10 a.

As shown in fig. 3 and 4, in the present embodiment, the first direction is defined as an X-axis direction, the second direction is defined as a Y-axis direction, that is, the first direction and the second direction are perpendicular to each other, and both the first direction and the second direction are parallel to the upper surface 431 of the bottom plate 43, that is, both the X-axis direction and the Y-axis direction are perpendicular to the optical axis of the lens assembly 10 a. At this time, the driving member 5 drives the filter 4 to reciprocate on the Y axis to change the projection positions of the light rays of the first wavelength band passing through the first region 41 and the light rays of the second wavelength band passing through the second region 42 on the photosensitive chip 2.

As shown in fig. 3, in the present embodiment, the arrangement direction of the first areas 41 and the second areas 42 is the Y-axis direction, wherein in the present embodiment, the first areas 41 and the second areas 42 are alternately arranged in the Y-axis direction in sequence and are fully distributed in the optical filter portion 46, that is, the whole optical filter 4 can only allow the light of the first wavelength band and the light of the second wavelength band to pass through. Meanwhile, the first area 41 and the second area 42 are also spread over the optical filter portion 46 in the X-axis direction, that is, the first area 41 and the second area 42 extend from one end to the other end of the optical filter portion 46, respectively, in the X-axis direction. The arrangement makes the structure of the optical filter 4 simpler, and facilitates subsequent processing of the first image and the second image.

In addition, in the present embodiment, the width of the first region 41 is the same as the width of the second region 42, so that the width of the projection area (defined as the a region) of the light beam from the first region 41 on the photosensitive chip 2 is the same as the width of the projection area (defined as the B region) of the light beam from the second region 42 on the photosensitive chip 2, and thus the distance that the optical filter 4 moves each time is equal to the width of the first region 41, the position exchange between the a region and the B region can be ensured, which can facilitate the subsequent processing of the first image and the second image.

It is understood that, in some embodiments, the first regions 41 and the second regions 42 may also be alternately arranged in sequence on the X axis, that is, the first regions 41 and the second regions 42 are arranged in a grid shape, and at this time, the filter 4 may also be driven by the driving member 5 to move on the Y axis. In addition, in some embodiments, the filter 46 may further include a third region for passing light of a third wavelength or a region for passing light of other wavelengths.

As shown in fig. 4, in the present embodiment, the optical filter further includes an anti-reflection layer 48, and the anti-reflection layer 48 is disposed on the lower surface 432 of the bottom plate 43 to improve the light transmittance of the bottom plate 43. In this embodiment, the anti-reflection layer completely covers the lower surface 432 of the bottom plate 43, and the anti-reflection layer 48 may be ZrO plated on the lower surface 432₂Films, and the like.

As shown in fig. 2, in the present embodiment, the driving member 5 includes a first magnetic unit 51, a second magnetic unit 52 and a mounting seat 53. Wherein, the mounting seat 53 is slidably disposed on the bracket 3, the optical filter 4 and the second magnetic unit 52 are both fixed on the mounting seat 53, and the first magnetic unit 51 is disposed on the bracket 3 and is opposite to the second magnetic unit 52 at a distance.

In this embodiment, the first magnetic unit 51 is an electromagnetic unit and the second magnetic unit 52 is a permanent magnet, and applying a corresponding voltage to the first magnetic unit 51 can make the first magnetic unit 51 and the second magnetic unit 52 attract or repel each other, so as to drive the optical filter 4 and the mounting base 53 to move relative to the bracket 3. It is understood that in other embodiments, the first magnetic unit 51 and the second magnetic unit 52 may be both provided as electromagnetic units, or the first magnetic unit 51 may be provided as a permanent magnet and the second magnetic unit 52 may be provided as an electromagnetic unit.

As shown in fig. 2, the mount 53 is provided with a through hole 531 penetrating the mount 53, and the through hole 531 faces the photosensitive chip 2 and the optical filter 4 so as not to interfere with the light projected from the optical filter 4 from propagating to the photosensitive chip 2. In this embodiment, the through hole 531 is a stepped hole, and the filter 4 is fixed to a stepped surface of the stepped hole by bonding or the like. Specifically, the connecting portion 47 is connected to the step surface, and the filter portion 46 is suspended at the step hole.

As shown in fig. 2, in the present embodiment, the bracket 3 has a first surface 31 and a second surface 32 opposite to each other, and a hollow cavity 33 penetrating from the first surface 31 to the second surface 32. The first surface 31 is connected to the substrate 1, the second surface 32 is connected to the lens assembly 10a, and the photo sensor chip 2 is located in the hollow cavity 33. In addition, in the present embodiment, the supporting member 34 is disposed on the sidewall of the hollow chamber 33, and the mounting seat 53 is slidably disposed on the supporting member 34.

As shown in fig. 2, in the present embodiment, the support 34 includes a first support portion 34a and a second support portion 34b, the first support portion 34a and the second support portion 34b are both disposed on the sidewall of the hollow cavity 33, and the first support portion 34a and the second support portion 34b are spaced and disposed opposite to each other. The first supporting portion 34a is provided with a first open slot 341, the second supporting portion is provided with a second open slot 342, and an opening of the first open slot 341 and an opening of the second open slot 342 are oppositely arranged to form an installation space; the mount 53 is mounted in the mounting space and is slidable in the mounting space. Specifically, in the present embodiment, the first end of the mounting seat 53 is disposed in the first opening groove 341, and the second end is disposed in the second opening groove 342.

In this embodiment, the two support portions are sequentially arranged in the Y-axis direction, the sliding direction of the mounting seat 53 relative to the bracket 34 is the same as the arrangement direction of the two support portions, and at this time, the distance between the bottom surfaces of the two open grooves is larger than the size of the mounting seat 53 in the Y-axis direction. It can be understood that, in some embodiments, the arrangement direction of the two supporting portions may also be the same as the X axis, at this time, the length direction of the two open slots is parallel to the Y axis direction, and the mounting seat 53 may drive the optical filter 4 to slide along the length direction of the two open slots. In addition, in some embodiments, the first supporting portion 34a and the second supporting portion 34b can be combined to form a closed loop structure, so that the circumference of the mounting seat 53 can be supported by the supporting plate 343, for example, the mounting seat 53 has a square structure, and the two supporting portions form a square ring structure.

As shown in fig. 2, in the present embodiment, the number of the second magnetic units 52 is two, and the two second magnetic units 52 are respectively embedded in the first end and the second end of the mounting seat 53. The number of the first magnetic units 51 is also two, wherein one first magnetic unit 51 is disposed on the side of the first supporting portion 34a away from the mounting seat 53, and the other first magnetic unit 51 is disposed on the side of the second supporting portion 34b away from the mounting seat 53. It is understood that, in some embodiments, the two first magnetic units 51 may also be respectively disposed on the groove bottoms of the first opening groove 341 and the second opening groove 342. Of course, in other embodiments, the number of the first magnetic units 51 and the second magnetic units 52 may be other values, and these first magnetic units and the second magnetic units 52 are arranged in a one-to-one correspondence.

In addition, the dimension of the first opening groove 341 in the optical axis direction is equal to the dimension of the mount 53 in the optical axis direction. Meanwhile, in the present embodiment, the dimension of the second open groove 342 in the optical axis direction is equal to the dimension of the mount 53 in the optical axis direction. The arrangement can not only enable the mounting seat 53 to slide in the open slot, but also prevent the mounting seat 53 from jumping in the optical axis direction.

As shown in fig. 2, in the present embodiment, the first supporting part 34a includes a supporting plate 343, a baffle 344, and a connecting plate 345, wherein the supporting plate 343 and the baffle 344 are spaced apart from each other on the connecting plate 345 to form a first open slot 341, and the connecting plate 345 is fixed on a sidewall of the hollow cavity 33. After the camera module 10 is assembled, the barrier 344 and the support plate 343 are sequentially disposed in a direction from the lens assembly 3 to the photo chip 2. For the convenience of production, the supporting plate 343, the baffle 344 and the connecting plate 345 may be integrally formed, that is, the first supporting portion 34a is an integrally formed structure. Meanwhile, the first support portion 34a and the second support portion 34b are provided in the same structure for the convenience of production. In addition, in the present embodiment, the support plate 343 is disposed in parallel with the baffle 344, and the spacing between the connection plates of the two support portions is larger than the dimension of the mount 53 in the Y-axis direction.

In the above embodiments, the filter 4 is indirectly engaged with the bracket 34 through the mounting seat 53, which makes the installation of the filter 4 more convenient. It will be appreciated that in some embodiments, the mounting base 53 may not be provided, and in this case, the optical filter 4 may be directly engaged with the bracket 34, and the second magnetic unit 52 may be directly connected to the optical filter 4.

In order to facilitate understanding of the operation of the camera module 10, as shown in fig. 5, the present embodiment provides a schematic diagram of the operation principle of the camera module 10. In this embodiment, the photosensitive chip 2 may be divided into a first imaging area 21 and a second imaging area 22, which are sequentially arranged at intervals, wherein the light emitted from the first area 41 of the optical filter 4 can be just completely projected to the first imaging area 21, and the light emitted from the second area 41 of the optical filter 4 can be just completely projected to the second imaging area 22. Alternatively, the light emitted from the first region 41 of the filter 4 may be completely projected to the second imaging region 22, and the light emitted from the second region 41 of the filter 4 may be completely projected to the first imaging region 21.

As shown in fig. 5, it is assumed that the target object is a cylinder whose bottom surface is parallel to the filter 4, and the cross-sectional diameter of the target object is equal to the sum of the widths of the 4 first regions 41. When the filter 4 is located at the first position, the target object is exactly opposite to the two first areas 41 and the two second areas 42. In the direction shown in fig. 5, the four regions are, from left to right, a first region 41a, a second region 42a, a first region 43b, and a second region 42 b.

In the present embodiment, when the filter 4 is located at the first position, the first region 41 is directly opposite to the first imaging region 21 of the filter 2, and the second region 42 is directly opposite to the second imaging region 22 of the filter 2, so that the light emitted from the first region 41 can be projected to the first imaging region 21 completely, and the light emitted from the second region 42 can be projected to the second imaging region 22 completely.

As shown in fig. 5, when the filter 4 is located at the first position, the first image 7 obtained by the photosensitive chip 2 can be divided into 4 image areas, i.e., a first image area 73, a second image area 74, a third image area 75, and a fourth image area 76. Wherein the first image area 73 is imaged according to light emanating from the first area 41a, the third image area 75 is imaged according to light emanating from the first area 41b, the second image area 74 is imaged according to light emanating from the second area 42a, and the fourth image area 76 is imaged according to light emanating from the second area 42 b. At this point, the combination of the first image area 73 and the third image area 75 is the first feature 71, and the combination of the second image area 74 and the fourth image area 76 is the second feature 72.

In the present embodiment, the interval between the first position and the second position is the width of a first region 41, and fig. 5 shows an imaging schematic diagram of the photosensitive chip 2 when the filter 4 moves to the second position from the right, wherein when the filter 4 is located at the second position, the first region 41 is opposite to the second imaging region 22, and the second region 42 is opposite to the first imaging region 21, so that the light emitted from the first region 41 is just projected to the second imaging region 22, and the light emitted from the second region 42 is just projected to the first imaging region 21. At this time, the four regions opposite to the target object are the second region 42a, the first region 41b, the second region 42b, and the first region 41a in order from left to right.

As shown in fig. 5, when the filter 4 is located at the second position, the second image 8 obtained by the photosensitive chip 2 may be divided into 4 image areas, i.e., a fifth image area 83, a sixth image area 84, a seventh image area 85, and an eighth image area 86. Wherein the fifth image area 83 is imaged according to light emanating from the second area 42a, the seventh image area 85 is imaged according to light emanating from the second area 42b, the sixth image area 84 is imaged according to light emanating from the first area 41b, and the eighth image area 86 is imaged according to light emanating from the first area 41 c. At this point, the combination of the sixth image area 84 and the eighth image area 86 is the third feature 81 and the combination of the fifth image area 83 and the seventh image area 85 is the fourth feature 82.

As shown in fig. 5, in the radial direction of the target object, the target object is divided into a first part a, a second part B, a third part C and a fourth part D which are connected in sequence, wherein the parts have the same size in the radial direction of the target object. Assuming that the filter 4 is located at the first position, the first image area 73 is an image formed by light of the first wavelength band reflected by the first portion a, the second image area 74 is an image formed by light of the second wavelength band reflected by the second portion B, the third image area 75 is an image formed by light of the first wavelength band reflected by the third portion C, the fourth image area 76 is an image formed by light of the second wavelength band reflected by the fourth portion D, the fifth image area 83 is an image formed by light of the second wavelength band reflected by the first portion a, the sixth image area 84 is an image formed by light of the first wavelength band reflected by the second portion B, the seventh image area 85 is an image formed by light of the second wavelength band reflected by the third portion C, and the eighth image area 86 is an image formed by light of the first wavelength band reflected by the fourth portion D.

As shown in fig. 5, the first feature 71 and the third feature 81 combine to form a first fused feature 7a, where the first fused feature 7a is actually an image of the light sensing chip 2 based on light of the first wavelength band reflected from the target object. The second feature 72 and the fourth feature 82 combine to form a second fused feature 8a, in which case the second fused feature 8a is actually an image of the light sensing chip 2 based on light in the second wavelength band reflected from the target object, and the third image 9 formed by fusing the first fused feature 7a and the second fused feature 8a is actually equivalent to an image based on light in the first wavelength band and light in the second wavelength band reflected from the target object. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A light filtering component is used for being connected with a photosensitive component of a camera module so as to filter stray light emitted to the photosensitive component from a target object, and is characterized by comprising:

the bracket is fixedly connected with the photosensitive assembly;

the optical filter is provided with a first area and a second area, the first area is used for filtering light rays outside a first wave band, and the second area is used for filtering light rays outside a second wave band; the optical filter can be movably arranged on the bracket so that the optical filter has a first position and a second position relative to the bracket;

the arrangement directions of the first position and the second position are parallel to the arrangement directions of the first area and the second area, so that when the optical filter is located at the first position, light rays with a first wavelength reflected from the first area of the target object can be transmitted to the photosensitive assembly, and when the optical filter is located at the second position, light rays with a second wavelength reflected from the first area of the target object can be transmitted to the photosensitive assembly.

2. The filter assembly of claim 1, wherein the first regions and the second regions are alternately arranged in sequence, and a size of the first regions in an arrangement direction of the first regions and the second regions is the same as a size of the second regions; and/or

The support has first surface, second surface, and well cavity, the first surface with the second surface sets up back to the back, well cavity by the first surface runs through to the second surface, be equipped with support piece on the lateral wall of well cavity, light filter slidable ground sets up on the support piece.

3. A filter assembly according to claim 1 or 2, wherein the filter comprises a filter portion, and the first and second areas are both located at the filter portion, wherein in a first direction the first and second areas are all interspersed with the filter portion; in the second direction, the first areas and the second areas are alternately arranged in sequence in the first direction; the second direction is the arrangement direction of the first zone and the second zone, and the first direction is perpendicular to the second direction.

4. A filter assembly according to claim 3, wherein the filter further comprises a light-impermeable connecting portion, the connecting portion being provided outside the filter portion.

5. The filter assembly of claim 4, further comprising a driving member coupled to the connecting portion for driving the filter to change its position between the first position and the second position relative to the frame.

6. The filter assembly of claim 5, wherein the driving member comprises a first magnetic unit and a second magnetic unit, the first magnetic unit is connected to the bracket, and the second magnetic unit is connected to the filter; at least one of the first magnetic unit and the second magnetic unit is an electromagnetic unit, so that the first magnetic unit and the second magnetic unit can attract or repel each other, and the optical filter is driven to move relative to the bracket; and/or

The driving piece comprises a mounting seat which is slidably arranged on the bracket, and the optical filter is fixed on the mounting seat; and/or

The optical filter comprises an optical filter part, and the first area and the second area are both positioned in the optical filter part, wherein the first area and the second area are fully distributed in the optical filter part in a first direction; in the second direction, the first areas and the second areas are alternately arranged in sequence in the first direction; the second direction is the arrangement direction of the first area and the second area, the first direction is perpendicular to the second direction, and the first direction and the second direction are both perpendicular to the axis of the hollow cavity.

7. The filter assembly of claim 6, wherein the support includes a first support portion and a second support portion, the first support portion and the second support portion each being disposed on a sidewall of the hollow cavity;

the first supporting part is provided with a first open slot, the second supporting part is provided with a second open slot, and an opening of the first open slot and an opening of the second open slot are oppositely arranged to form an installation space; the mounting seat is mounted in the mounting space and can slide in the mounting space; one end of the mounting seat is arranged in the first open slot, and the other end of the mounting seat is arranged in the second open slot.

8. The filter assembly of claim 7, wherein the first open slot has a size equal to a size of the mount in an axial direction of the hollow cavity; and/or

In the axial direction of the hollow cavity, the size of the second opening groove is equal to that of the mounting seat; and/or

The first supporting part and the second supporting part are arranged in the same structure; and/or

The first supporting portion and the second supporting portion are sequentially arranged in the second direction.

9. The utility model provides a module of making a video recording which characterized in that includes:

a lens assembly;

the photosensitive assembly is opposite to the lens assembly and used for receiving the light projected from the lens assembly to perform imaging;

a light filtering component, connected to the lens component and the photosensitive component respectively, and located between the lens component and the photosensitive component, for filtering stray light emitted to the photosensitive component, wherein the light filtering component is as claimed in any one of claims 1 to 8, and the first direction and the second direction are both perpendicular to the optical axis of the lens component.

10. An electronic device, comprising:

a camera module according to claim 9;

and the controller is electrically connected with the camera module and is used for fusing a first image obtained by the photosensitive chip when the optical filter is positioned at the first position with a second image obtained by the optical filter at the second position to form a third image.

11. The electronic device of claim 10, further comprising a light module coupled to the controller for projecting light of a first wavelength band and light of a second wavelength band toward a target object.

12. A photographing method for photographing a target object by using the camera module according to claim 9, the photographing method comprising the steps of:

when the optical filter is located at a first position, the photosensitive chip obtains a first image according to the light projected from the optical filter;

controlling the optical filter to move to a second position, and acquiring a second image obtained by the photosensitive chip according to the light projected from the optical filter;

and fusing the first image and the second image to obtain a third image.

13. The shooting method according to claim 12, wherein the step of fusing the first image and the second image to obtain a third image comprises:

extracting a first feature and a second feature in the first image, and extracting a third feature and a fourth feature in the second image; the first feature and the third feature are images obtained by the photosensitive chip according to light rays of a first wave band, and the second feature and the fourth feature are images obtained by the photosensitive chip according to light rays of a second wave band;

fusing the first feature and the third feature to obtain a first fused feature and fusing the second feature and the fourth feature to obtain a second fused feature;

fusing the first fused feature and the second fused feature to obtain the third image.