Camera module and electronic device

Abstract

The present application discloses an imaging module and an electronic device. The imaging module includes a lens barrel, a lens group, a polarization modulation component, and an image sensor. The lens barrel has an optical channel. The lens group is disposed in the lens barrel and within the optical channel. The polarization modulation component is disposed in the lens group and at the edge of the optical channel. The image sensor is disposed on the light output side of the plurality of lenses. The image sensor includes polarization pixels, and the polarization directions of the polarization pixels and the polarization modulation component are different.

Description

Technical Field

[0001] This application belongs to the technical field of image acquisition, and particularly relates to an imaging module and an electronic device. Background Art

[0002] In the related art, the diversification and miniaturization of lenses provide more extensive functions and applications for lenses on mobile phone platforms. However, relatively speaking, it also increases the limitations and requirements for the optical and structural design of the lenses themselves, resulting in a series of problems.

[0003] When there is a strong light source within or within a certain range outside the lens field of view, the light emitted by the strong light source is reflected or scattered by the internal structure (structural parts, lenses) of the lens, and then converges on the image sensor to form a specific interference image at a point or a patch.

[0004] In order to improve the imaging quality of the image sensor, efforts are often made to improve the surface treatment of structural parts, fine-tune the optical design, and optimize the lens coating design, etc., in an attempt to solve the serious interference image, but with little success. Summary of the Invention

[0005] This application aims to provide an imaging module and an electronic device, which at least solve the problem of stray light and ghost images reducing the image quality.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] In a first aspect, an embodiment of this application provides an imaging module, which includes:

[0008] A lens barrel having an optical channel;

[0009] A lens group disposed in the lens barrel and located within the optical channel;

[0010] A polarization modulation member disposed in the lens group and located at the edge of the optical channel;

[0011] An image sensor disposed on the light-emitting side of the lens group, the image sensor includes polarization pixels, and the polarization directions of the polarization pixels and the polarization modulation member are different.

[0012] In a second aspect, an embodiment of this application provides an electronic device, including: a housing;

[0013] An imaging module, which is the imaging module provided in the first aspect above, and the imaging module is mounted on the housing.

[0014] In an embodiment of the present application, the camera module includes a lens barrel, a lens group, a polarization modulation component, and an image sensor. Among them, the lens barrel has an optical channel for allowing light to propagate to the image sensor. The lens group is disposed in the lens barrel and is located within the optical channel. The lens group includes a plurality of lenses, and the plurality of lenses are sequentially arranged in the optical channel along the optical axis from the object side to the image side. Optionally, the lens barrel can provide structural support for the plurality of lenses.

[0015] Among them, the polarization modulation component is disposed in the lens group and is located at the edge of the optical channel. There will be interfering light at the edge of the optical channel, that is, the polarization modulation component is located on the optical path of the interfering light. When the interfering light passes through the polarization modulation component, the interfering light will be applied with a polarization state and converted into polarized light. Among them, the interfering light includes stray light and / or ghost light.

[0016] Among them, the image sensor is disposed on the light-emitting side of the lens group. The image sensor includes polarization pixels, and the polarization directions of the polarization pixels and the polarization modulation component are different. When ordinary light propagates to the image sensor, it will form a normal image. When polarized light propagates to the image sensor, it will be blocked by the polarization pixels, making it impossible for the polarized light to form an image. At this time, the image produced by the image sensor is a de-interference image, that is, an interference image formed by interfering light is not included. That is to say, the de-interference image is no longer affected by (stray light, ghost images) and has high clarity.

[0017] In the present application, by setting a polarization modulation component on the lens group, the interfering light can be polarization-modulated, so that the interfering light does not affect the imaging of the image sensor, enabling the image sensor to have the ability to distinguish stray light and ghost images and effectively image, and significantly improving the imaging clarity of the image sensor.

[0018] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0020] Figure 1 is a schematic diagram of a camera module according to the first embodiment of the present application;

[0021] Figure 2 is a schematic diagram of a camera module according to the second embodiment of the present application;

[0022] Figure 3 is a schematic diagram of a camera module according to the third embodiment of the present application;

[0023] Figure 4Schematic diagram of an imaging module according to the fourth embodiment of the present application;

[0024] Figure 5 Schematic diagram of the structure of an image sensor according to an embodiment of the present application;

[0025] Figure 6 Schematic diagram showing the passing of light through a polarization modulation member according to an embodiment of the present application;

[0026] Figure 7 Schematic diagram showing the structure of a polarization pixel according to an embodiment of the present application.

[0027] Reference numerals:

[0028] 10 Lens barrel, 10a Light channel,

[0029] 11 Lens,

[0030] 12 Separator, 120 Light passing port,

[0031] 121 First spacer ring, 122 First spacer,

[0032] 123 Second spacer ring, 124 Second spacer, 125 Third spacer,

[0033] 13 Polarization modulation member, 130 First linear polarizer, 131 Second linear polarizer, 132 Light passing port, 133a First polarization coating, 133b Second polarization coating,

[0034] 14 Image sensor,

[0035] 140 Polarization pixel, 141 Microlens, 142 Photodiode, 143 Linear polarizer, 144 Non-polarization pixel,

[0036] 15 Filter. Detailed implementation manners

[0037] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present application and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0038] The terms "first", "second" in the description and claims of this application may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally indicates an "or" relationship between the associated objects before and after.

[0039] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0040] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] The following Figures 1 to 7 describes a camera module and an electronic device according to an embodiment of this application.

[0042] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, according to some embodiments of this application, a camera module includes a lens barrel 10, a lens group, a polarization modulation member 13, and an image sensor 14. The lens barrel 10 has an optical channel 10a. The lens group is disposed in the lens barrel 10 and is located in the optical channel 10a. The polarization modulation member 13 is disposed in the lens group and is located at the edge of the optical channel 10a. The image sensor 14 is disposed on the light output side of the lens group. The image sensor 14 includes polarization pixels 140, and the polarization directions of the polarization pixels 140 and the polarization modulation member 13 are different.

[0043] In an embodiment of the present application, the camera module includes a lens barrel 10, a lens group, a polarization modulation member 13, and an image sensor 14. Among them, the lens barrel 10 has an optical channel 10a for allowing light to propagate to the image sensor 14. The lens group is disposed within the lens barrel 10 and is located within the optical channel 10a. The lens group includes a plurality of lenses 11, and the plurality of lenses 11 are sequentially arranged in the optical channel 10a along the optical axis from the object side to the image side. Optionally, the lens barrel 10 can provide structural support for the plurality of lenses 11.

[0044] Among them, the polarization modulation member 13 is disposed in the lens group and is located at the edge of the optical channel 10a. There will be interfering light at the edge of the optical channel 10a, that is, the polarization modulation member 13 is located on the optical path of the interfering light. When the interfering light passes through the polarization modulation member 13, the interfering light will be applied with a polarization state and converted into polarized light. The interfering light includes stray light and / or ghost light.

[0045] Among them, the image sensor 14 is disposed on the light-emitting side of the lens group. The image sensor 14 includes polarization pixels 140, and the polarization directions of the polarization pixels 140 and the polarization modulation member 13 are different. When ordinary light propagates to the image sensor 14, normal imaging will occur. When polarized light propagates to the image sensor 14, it will be blocked by the polarization pixels 140, so that the polarized light cannot be imaged. At this time, the image formed by the image sensor 14 is a de-interference image, that is, it does not include the interference image formed by the interfering light. That is to say, the de-interference image is no longer affected by (stray light, ghost images) and has high clarity.

[0046] In the present application, the polarization modulation member 13 is disposed at a specific position on the lens group and is combined with the polarization pixels 140 disposed on the image sensor 14, so as to perform polarization modulation on the interfering light, so that the interfering light does not affect the imaging of the image sensor 14, enabling the image sensor 14 to have the ability to distinguish stray light and ghost images and effectively image, and significantly improving the imaging clarity of the image sensor 14.

[0047] It should be noted that the image sensor 14 uses the photoelectric conversion function of optoelectronic devices to convert the light on the photosensitive surface into an electrical signal corresponding to the optical image in a proportional relationship. The polarization pixels 140 are pixels capable of detecting the polarization state of light.

[0048] It should be noted that in the related art, regarding the method of improving the surface treatment of structural components, although it can reduce the stray light intensity to a certain extent, it cannot completely eliminate the stray light, and there is also a risk of causing new stray light phenomena; regarding the method of fine-tuning the optical design, the performance of the modified optical system will be sacrificed to some extent, and there are also ghost images that are almost impossible to modify. For example, in the case of a large-angle light source incident, the four-time reflection ghost image generated inside the first lens of the main camera lens exists in almost all mobile phone main camera lenses; regarding the method of optimizing the coating design of lens 11, although it can increase the transmission performance of lens 11 and reduce reflection, there is still a limit, and due to the various surface shapes of lens 11, it is difficult to achieve uniform coating for complex surface shapes, resulting in unsatisfactory effects. In the imaging module of the present application, by adding the polarization modulation member 13 and setting the polarization pixels 140 on the image sensor 14, it is possible to effectively eliminate the influence of stray light and ghost images on the imaging clarity and meet the image quality requirements.

[0049] Optionally, the number of the polarization modulation members 13 is one. The optical path of the interfering light includes a stray light optical path and a ghost image optical path. The polarization modulation member 13 is arranged at a specific position where the stray light optical path and the ghost image optical path converge, so as to apply polarization states to different optical paths of the interfering light by one polarization modulation member 13, which can simplify the structure and reduce the cost.

[0050] Optionally, the number of the polarization modulation members 13 is at least two, and at least two polarization modulation members 13 are arranged at intervals on the optical path of the interfering light.

[0051] In this embodiment, when there are at least two strong light sources within or within a certain range outside the field of view of the imaging module, the light rays emitted by the strong light sources will form interfering light at at least two different positions inside the imaging module. Corresponding polarization modulation members 13 are respectively arranged for the interfering light at different positions, so as to accurately apply polarization states to each interfering light, convert the interfering light at different positions into polarized light, and the polarized light cannot form an image on the image sensor 14 having polarization pixels 140, thereby obtaining a de-interference image without the influence of stray light and ghost images, and effectively improving the imaging effect and clarity of the imaging module.

[0052] According to some embodiments of the present application, further, as Figure 5 and Figure 7 shown, the image sensor 14 further includes non-polarization pixels 144, and the non-polarization pixels 144 and the polarization pixels 140 are arranged in an array.

[0053] In this embodiment, the image sensor 14 further includes non-polarization pixels 144, and the non-polarization pixels 144 can form a conventional imaging system. The polarization pixels 140 can form a polarization imaging system. The image sensor 14, in combination with the non-polarization pixels 144 and the polarization pixels 140, forms an imaging system that combines a conventional imaging system and a polarization imaging system.

[0054] It should be noted that the polarization pixels 140 and the non-polarization pixels 144 are arranged in an array on the same layer.

[0055] When polarized light propagates to the polarization pixels 140, it will be filtered, that is, the polarized light cannot form an image at the image sensor 14. Ordinary light can form a normal image when it propagates to the polarization pixels 140. However, after passing through the polarization pixels 140, the ordinary light will lose part of its light intensity. Therefore, a de-noised image can be obtained according to the polarization pixels 140, and the de-noised image has the characteristics of low brightness and no stray light ghosts. If the image sensor 14 only includes the polarization pixels 140, although the stray light ghosts can be completely removed, a large amount of incident light will be lost, resulting in the problem of too low brightness of the de-noised image.

[0056] When polarized light propagates to the non-polarization pixels 144, ordinary light propagates to the non-polarization pixels 144 or the polarization pixels 140, normal imaging can be achieved. A conventional image can be obtained according to the non-polarization pixels 144, or the non-polarization pixels 144 and the polarization pixels 140. The conventional image has the characteristics of high brightness and including stray light ghosts. That is to say, when light passes through the non-polarization pixels 144, the light intensity loss is small, and the non-polarization pixels 144 can effectively ensure the incident light amount of the image sensor 14.

[0057] According to the conventional image and the de-noised image, and by means of some image quality clarity evaluation methods and image analysis means, such as the energy gradient function, deep learning, de-hazing algorithm, etc., the components of the stray light ghosts are screened out and removed from the conventional image, and then an imaging with high brightness and high clarity can be obtained.

[0058] With the combined action of the non-polarization pixels 144 and the polarization pixels 140, an imaging with high brightness and high clarity can be obtained, further improving the imaging quality.

[0059] According to some embodiments of the present application, further, as Figure 5 and Figure 7 shown, the number a of the polarization pixels 140 and the number b of the non-polarization pixels 144 satisfy 0.5(a + b) ≤ b ≤ 0.75(a + b).

[0060] In this embodiment, the number of polarization pixels accounts for a relatively small proportion of the total number of pixels in the image sensor 14, while the non-polarization pixels 144 account for a relatively large proportion. This is because if the number of polarization pixels 140 in the image sensor 14 is too large, although stray light ghosts can be significantly removed, a large amount of incident light will be lost, resulting in the problem of too low brightness of the interference-removed image. Therefore, the ratio of polarization pixels 140 to non-polarization pixels 144 needs to be balanced to ensure the incident light amount of the image sensor 14 while effectively removing stray light ghosts.

[0061] Optionally, the number b of non-polarization pixels 144 accounts for half to three-quarters of the total number of pixels (a + b) in the image sensor 14.

[0062] According to some embodiments of the present application, further, as Figure 7 shown, the polarization pixel 140 includes a microlens 141, a photodiode 142, and a linear polarizer 143. The photodiode 142 is provided on the light-emitting side of the microlens 141, and the linear polarizer 143 is located between the microlens 141 and the photodiode 142.

[0063] In this embodiment, the microlens 141 is used to converge light, the photodiode 142 is used to convert light into an electrical signal, and the linear polarizer 143 is used to filter polarized light so that the polarized light does not reach the photodiode 142, that is, the polarized light will not form an image on the photodiode.

[0064] It should be noted that the main axis of the linear polarizer 143 is perpendicular to the main axis of the polarization modulation member 13. In this case, the polarization pixel 140 can filter the polarized light from the polarization modulation member 13, that is, the polarized light will not reach the photodiode 142, and the polarized light will not be imaged at the photodiode 142.

[0065] Optionally, the non-polarization pixel 144 includes a microlens 141 and a photodiode 142. Under the converging action of the microlens 141, light is guided into the photodiode 142 to meet the imaging requirements.

[0066] Optionally, based on the traditional RGGB image sensor 14, the array of the RGGB image sensor 14 includes 25% red, 50% green, and 25% blue. The RGGB image sensor 14 includes polarization pixels 140. The light converged by the microlens 141 will finally reach the photodiode 142 after passing through the linear polarizer 143 for photoelectric conversion and imaging.

[0067] Based on the structure of the RGGB image sensor 14, the polarization modulation member 13 only allows light with the vibration direction of the electric vector in one direction to pass through and absorbs light in other directions. This direction is called the main axis.

[0068] Similarly, for the polarization pixel 140 of the RGGB image sensor 14, the linear polarizer 143 also has a main axis. When the main axis of the polarization modulation member 13 and the main axis of the linear polarizer 143 are perpendicular to each other, the light passing through the polarization modulation member 13 will not reach the photodiode 142 of the polarization pixel 140, that is, the polarized light will not be imaged.

[0069] According to some embodiments of the present application, further, as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, the lens group includes a plurality of lenses 11 and a separator 12. The separator 12 is provided on the plurality of lenses 11. The separator 12 has a light passing opening 120, and the polarization modulation member 13 is provided on the separator 12.

[0070] In this embodiment, the plurality of lenses 11 are sequentially arranged along the optical axis from the object side to the image side in the optical channel 10a. The separator 12 is provided on the plurality of lenses 11 and can be used to adjust the gap between the lenses 11. Since the number of lenses 11 is plural, a set of adjacent lenses 11 among the plurality of lenses 11 can be in direct contact without providing the separator 12, and the gap therebetween is 0. Another set of adjacent lenses 11 among the plurality of lenses 11 are not in direct contact, and the separator 12 makes the gap therebetween greater than 0. That is to say, when the number of lenses 11 is n, the number of separators 12 is greater than 0 and less than or equal to n - 1. The number of separators 12 can be adjusted according to the actual setting requirements of the lenses 11. The separator 12 is provided with a light passing opening 120. While the separator 12 plays a role in spacing adjacent lenses 11, it will not have an adverse impact on the normal propagation of light.

[0071] Optionally, the separator 12 includes a spacer ring, and the spacer ring can be used to position the plurality of lenses 11, that is, to adjust the gap between adjacent lenses 11. Optionally, the separator 12 further includes a spacer, and the spacer is used to block light and absorb stray light at non-effective diameter positions of the lenses 11.

[0072] The polarization modulation member 13 is provided on the separator 12 and / or the lens 11 and is located on the optical path of the interfering light. When the interfering light passes through the polarization modulation member 13, the interfering light will be applied with a polarization state and converted into polarized light. Among them, the interfering light includes stray light L1 and / or ghost image light L2. It should be noted that the stray light L1 is caused by reflection or scattering of the separator 12 and the lens 11. The ghost image light L2 is caused by reflection between the lenses 11. That is to say, the formation of the stray light L1 and the ghost image light L2 is inseparable from the separator 12 and the lens 11. Therefore, the polarization modulation member 13 is provided on the separator 12 and / or the lens 11, so as to effectively eliminate the stray light L1 and / or the ghost image light L2.

[0073] Optionally, the number of lenses 11 includes 3, 4, 5, 6, 7, 8, etc.

[0074] In a specific embodiment, as Figure 1 and Figure 2 shown, the polarization modulation member 13 includes a first linear polarizer 130, and the first linear polarizer 130 is disposed on the edge of the separator 12 close to the light passing port 120.

[0075] In this embodiment, the specific setting position of the polarization modulation member 13 is described. Among them, the polarization modulation member 13 includes a first linear polarizer 130, and the first linear polarizer 130 is disposed on the inner edge of the separator 12. Since the separator 12 has a light passing port 120, the first linear polarizer 130 is located within the light passing port 120. The setting of the first linear polarizer 130 does not additionally increase the size of the camera module in the optical axis direction, adapting to the miniaturization development trend of the camera module. Among them, the first linear polarizer 130 has a light passing port 132 for the passage of imaging light, and on the premise of satisfying the polarization modulation of interfering light, it is ensured as much as possible that the imaging light propagates to the image sensor 14.

[0076] Optionally, the first linear polarizer 130 is disposed on the inner edge of the spacer.

[0077] Optionally, the first linear polarizer 130 is adhered to the inner edge of the separator 12 by an adhesive.

[0078] Optionally, when the light passing cross-section of the light passing port 120 is circular, the separator 12 is a separating ring. When the light passing cross-section of the light passing port 132 is circular, the first linear polarizer 130 is a polarization ring, and the polarization ring is disposed at the inner ring of the separating ring.

[0079] It should be noted that in the case where the first linear polarizer 130 is not provided, the light passing through the light passing port 120 includes interfering light and imaging light. When the first linear polarizer 130 is disposed on the inner edge of the separator 12, the interfering light is polarization modulated. At the same time, a part of the imaging light passing through the light passing port 120 will also be polarization adjusted by the first linear polarizer 130. For this part of the imaging light, there will be a 50% light intensity loss, but it will not cause any impact on the final imaging effect except for the overall brightness decrease of the picture. Among them, the degree of brightness decrease of the final imaging effect depends on the size of the first linear polarizer 130.

[0080] When the area of the first linear polarizer 130 within the light passing port 120 is relatively large and the light passing port 132 is relatively small, the impact on the brightness will be relatively large because a relatively large amount of imaging light passes through the first linear polarizer 130, resulting in a large light intensity loss and a decrease in brightness.

[0081] When the area of the first linear polarizer 130 located within the light passing port 120 is set reasonably and the size of the light passing port 132 is appropriate, on the basis of satisfying the polarization modulation of interfering light, the influence on imaging light can be reduced, and thus the brightness will not be affected too much.

[0082] Among them, as Figure 6 shown, there is generally a corresponding relationship between the position A where the interfering light passes through concentratedly and the object-side light source B in the imaging system. The position of the light source B on the object side is generally symmetric with the position A where the interfering light passes through concentratedly with the optical axis center as the symmetry axis (i.e., the center of the circle of the light passing port 132 in the figure). It should be noted that the shape of the area A where the interfering light passes through concentratedly is not limited to a circle, and can also be an ellipse, or an arc shape, etc.

[0083] It should be noted that the area of the area A where the interfering light passes through concentratedly determines the actual size of the first linear polarizer 130. Referring to several common stray light optical path diagrams in the camera module, generally, the position of the stray light ghost image in the imaging system of the lens is either at the aperture edge of the optical channel 10a, or the propagation path of the interfering light is close to the edge of the light passing aperture. Then, at the position where the interfering light passes through concentratedly, that is, at the position close to the inner edge of the separator 12, adding the polarization modulation member 13 can not only perform polarization modulation on the interfering light, but also minimize the influence on the brightness of the system imaging.

[0084] In addition, for interfering lights at different positions, the polarization modulation member 13 can be reused at different positions. When the polarization directions of these polarization modulation members 13 are the same, the repeated structure will not cause additional light intensity influence.

[0085] Furthermore, as Figure 1 and Figure 2 shown, the separator 12 includes a first spacer ring 121 and a first spacer 122. The first spacer 122 is stacked with the first spacer ring 121, and the first linear polarizer 130 is provided on the edge of the first spacer 122 close to the light passing port 120.

[0086] In this embodiment, the separator 12 includes a first spacer ring 121 and a first spacer 122. The first spacer 122 is stacked with the first spacer ring 121. Among them, the first spacer ring 121 mainly plays a role in positioning the lens 11 and adjusting the gap between adjacent lenses 11. The first spacer 122 is used to block light and absorb stray light at the non-effective diameter position of the lens 11. Making the first linear polarizer 130 provided on the edge of the first spacer 122 close to the light passing port 120 can more effectively perform polarization modulation on the area where the interfering light passes through concentratedly.

[0087] In a specific embodiment, as Figure 3As shown, the polarization modulation member 13 includes a second linear polarizer 131, and the second linear polarizer 131 is stacked with the separator 12. The second linear polarizer 131 has a light passing port 132 communicating with the light passing port 120, and the diameter of the light passing port 132 is smaller than that of the light passing port 120.

[0088] In this embodiment, the specific setting position of the polarization modulation member 13 is described. Among them, the polarization modulation member 13 includes a second linear polarizer 131, and the second linear polarizer 131 is stacked on one side of the separator 12 along the optical axis direction. Optionally, the second linear polarizer 131 is stacked on the light incident side of the separator 12. Or, the second linear polarizer 131 is stacked on the light exiting side of the separator 12. The second linear polarizer 131 has a light passing port 132 communicating with the light passing port 120, and the diameter D2 of the light passing port 132 is smaller than the diameter D1 of the light passing port 120, that is, the first part of the second linear polarizer 131 is stacked on one side of the separator 12. Optionally, the first part of the second linear polarizer 131 can be stacked between the separator 12 and the lens 11, or can be stacked between two separators 12. The first part of the second linear polarizer 131 is used for positioning and installation, so that the second linear polarizer 131 can be stably assembled inside the camera module, with better position stability and less preparation difficulty. At the same time, the second part of the second linear polarizer 131 is exposed relative to the inner edge of the separator 12, and the second part of the second linear polarizer 131 is used to apply a polarization state to the interfering light.

[0089] According to some embodiments of the present application, further, as Figure 4 As shown, the separator 12 includes a second spacer 124 and a third spacer 125 arranged at intervals. The polarization modulation member 13 includes a first polarization coating 133a and a second polarization coating 133b. The first polarization coating 133a is provided on the surface of the second spacer 124 facing the third spacer 125; the second polarization coating 133b is provided on the surface of the third spacer 125 facing the second spacer 124, and the polarization directions of the first polarization coating 133a and the second polarization coating 133b are the same.

[0090] In this embodiment, the polarization modulation member 13 includes a polarization coating, and the polarization coating is provided on the separator 12. The interfering light is reflected by the polarization coating and converted into polarized light. Optionally, the polarization coating is provided on the spacer of the separator 12, which will not affect the imaging light in the imaging system and can effectively affect the stray light problem in the interfering light.

[0091] Among them, the second spacer 124 and the third spacer 125 have inner surfaces close to each other, and the first polarization coating 133a and the second polarization coating 133b are respectively provided on the inner surfaces of the second spacer 124 and the third spacer 125. Among them, interfering light can be polarized on the first polarization coating 133a and the second polarization coating 133b, and finally polarized light is formed.

[0092] Optionally, a second spacer ring 123 is provided between the second spacer 124 and the third spacer 125. Optionally, the second spacer 124 is provided on the light incident side of the second spacer ring 123, and the third spacer 125 is provided on the light exiting side of the second spacer ring 123.

[0093] Optionally, as Figure 1 , Figure 2 and Figure 3 shown, the camera module further includes a filter 15. The filter 15 is provided on the light incident side of the image sensor 14. The filter 15 is used to filter the infrared band in the light, and can block infrared rays from passing through the image sensor 14 and causing picture distortion.

[0094] An electronic device according to some embodiments of the present application includes a housing and the camera module provided in any of the foregoing embodiments, and the camera module is mounted on the housing.

[0095] The electronic device provided by the present application includes the camera module provided by any of the above designs, and thus has all the beneficial effects of the camera module, which will not be elaborated here.

[0096] Optionally, the electronic device is a mobile terminal such as a mobile phone, a wearable device, a tablet computer, a laptop computer, a mobile computer, a handheld game console, a video recorder, a video camera, a radio, a tape recorder, a CD player, a mini audio system, etc.

[0097] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0098] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An imaging module, characterized in that, Comprising: A lens barrel having an optical channel; A lens group disposed in the lens barrel and within the optical channel; A polarization modulation member disposed in the lens group and at the edge of the optical channel. The polarization modulation member is located on the optical path of interfering light and is configured to perform polarization modulation on the interfering light to convert the interfering light into polarized light; An image sensor disposed on the light output side of the lens group. The image sensor includes polarization pixels, and the polarization directions of the polarization pixels and the polarization modulation member are different. The polarization pixels are configured to detect the polarization state of light and filter the polarized light.

2. The camera module according to claim 1, wherein The image sensor further includes: Non-polarization pixels, which are arranged in an array with the polarization pixels.

3. The imaging module according to claim 2, wherein The number a of the polarization pixels and the number b of the non-polarization pixels satisfy 0.5(a + b) ≤ b ≤ 0.75(a + b).

4. The imaging module according to claim 1, wherein The polarization pixels include: A microlens; A photodiode disposed on the light output side of the microlens; A linear polarizer located between the microlens and the photodiode.

5. The camera module according to any one of claims 1 to 4, characterized in that, The lens group includes: A plurality of lenses; A separator disposed on the plurality of lenses. The separator has a light passing opening, and the polarization modulation member is disposed on the separator.

6. The imaging module according to claim 5, wherein The polarization modulation member includes: A first linear polarizer disposed on the edge of the separator near the light passing opening.

7. The imaging module according to claim 6, wherein, The separator includes: A first spacer ring; A first spacer sheet stacked with the first spacer ring. The first linear polarizer is disposed on the edge of the first spacer sheet near the light passing opening.

8. The camera module according to claim 5, characterized in that, The polarization modulation member includes: A second linear polarizer stacked with the separator; The second linear polarizer has a light passing opening communicating with the light passing opening, and the diameter of the light passing opening is smaller than the diameter of the light passing opening.

9. The imaging module according to claim 5, wherein The separator includes a second spacer sheet and a third spacer sheet disposed at intervals; The polarization modulation member includes: A first polarization coating disposed on the surface of the second spacer sheet facing the third spacer sheet; A second polarization coating disposed on the surface of the third spacer sheet facing the second spacer sheet. The polarization directions of the first polarization coating and the second polarization coating are the same.

10. An electronic device, characterized in that, Comprising: A housing and an imaging module, where the imaging module is the imaging module according to any one of claims 1 to 9, and the imaging module is mounted on the housing.

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