Camera module and electronic device

Abstract

The present disclosure relates to a camera module and an electronic device, and belongs to the technical field of optical imaging. The camera module comprises a housing, a first mirror, a second mirror and a photosensitive element; the housing has a light inlet; the first mirror and the second mirror are fixed in the housing respectively, and the second mirror is located on the light path between the light inlet and the first mirror; wherein the light transmitted through the light inlet is reflected by the first mirror and the second mirror in sequence and then irradiates on the photosensitive element. By using the present disclosure, the image magnification of the camera module can be improved without increasing the size of the camera module.

Description

Technical Field

[0001] This disclosure relates to the field of optical imaging technology, and in particular to a camera module and electronic device. Background Technology

[0002] Nowadays, camera modules have gradually become a mainstream feature in mobile phones and other electronic devices. To meet consumers' needs for long-distance shooting, mobile phones and other electronic devices are usually equipped with telephoto camera modules.

[0003] Due to the size limitations of mobile phones, the image magnification of telephoto camera modules is limited.

[0004] Therefore, for telephoto camera modules, how to increase image magnification without increasing the overall size is a problem worth studying. Summary of the Invention

[0005] This disclosure provides a camera module and an electronic device that can solve the technical problems existing in related technologies. The technical solutions of the camera module and electronic device are as follows:

[0006] In a first aspect, this disclosure provides a camera module, which includes a housing, a first reflector, a second reflector, and a photosensitive element;

[0007] The housing has a light inlet;

[0008] The first reflector and the second reflector are respectively fixed inside the housing, and the second reflector is located in the optical path between the light inlet and the first reflector;

[0009] The light transmitted through the light inlet is reflected sequentially by the first reflector and the second reflector before illuminating the photosensitive element.

[0010] In some possible implementations, at least a portion of the optical path between the light inlet and the first reflector is not blocked by the second reflector;

[0011] The side of the second reflector facing away from the first reflector has a matte coating.

[0012] In some possible implementations, the first reflector has a groove structure on the side near the second reflector, which can converge reflected light toward the second reflector.

[0013] In some possible implementations, the camera module further includes a λ / 4 glass plate, which is fixed inside the housing and located in the optical path between the first reflector and the second reflector;

[0014] The second reflector is a polarizing reflector.

[0015] In some possible implementations, the housing also has a light-emitting port located in the light-emitting direction of the second reflector;

[0016] The photosensitive element is located outside the housing and is arranged opposite to the light outlet.

[0017] In some possible implementations, the camera module further includes a driving mechanism for driving the photosensitive element to move along a first direction, a second direction, and / or a third direction. The first direction is the axial direction of the light-emitting port, the second direction and the third direction are perpendicular to each other, and the second direction and the third direction are respectively perpendicular to the first direction.

[0018] In some possible implementations, the orientation of the light inlet is perpendicular to the axis of the first reflector;

[0019] The camera module also includes a third reflector, which is fixed inside the housing and located in the light-emitting direction of the light inlet;

[0020] The first reflector is located in the light-emitting direction of the third reflector.

[0021] In some possible implementations, the housing has a cylindrical structure, and the light inlet is located on the side wall of the cylindrical structure.

[0022] In some possible implementations, the optical path between the first reflector and the second reflector is within the range of [2 mm, 10 mm].

[0023] In a second aspect, this disclosure provides an electronic device that includes the camera module described in the first aspect and its possible implementations.

[0024] The technical solution provided in this disclosure includes at least the following beneficial effects:

[0025] This disclosure provides a camera module in which a second reflector is disposed in the optical path between the light inlet and the first reflector. This allows light transmitted through the light inlet to be reflected by the first reflector, then directed to the second reflector, and subsequently reflected again by the second reflector before reaching the photosensitive element. Compared to a technical solution where light travels directly from the light inlet to the photosensitive element, the technical solution provided in this disclosure increases the total optical path of the camera module (the increase in optical path is equal to the sum of the distance from the first reflector to the second reflector and the distance from the second reflector to the photosensitive element) without increasing the size of the camera module. This increases the focal length of the camera module, thereby improving the image magnification of the camera module without changing the object distance.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a camera module shown in an embodiment of this disclosure;

[0029] Figure 2 This is a schematic diagram of the structure of a camera module shown in an embodiment of this disclosure;

[0030] Figure 3 This is a schematic diagram of the structure of a camera module shown in an embodiment of this disclosure;

[0031] Figure 4 This is a schematic diagram of the structure of a camera module shown in an embodiment of this disclosure;

[0032] Figure 5 This is a schematic diagram of the structure of a camera module shown in an embodiment of this disclosure;

[0033] Figure 6 This is a schematic diagram of the structure of a camera module shown in an embodiment of this disclosure;

[0034] Figure 7 This is a schematic diagram of the structure of a camera module shown in an embodiment of this disclosure;

[0035] Figure 8 This is a schematic diagram of the structure of a camera module shown in an embodiment of this disclosure.

[0036] Legend

[0037] 1. Housing; 100. Matte coating;

[0038] 11. Light inlet; 12. Light outlet;

[0039] 2. First reflecting mirror;

[0040] 21. Groove structure;

[0041] 3. Second reflecting mirror;

[0042] 4. Photosensitive element;

[0043] 5. λ / 4 glass slide;

[0044] 6. Drive mechanism;

[0045] 7. Third reflecting mirror. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0047] This disclosure provides a camera module, such as... Figure 1 As shown, the camera module includes a housing 1, a first reflector 2, a second reflector 3, and a photosensitive element 4.

[0048] The housing 1 has a hollow structure and a light inlet 11 through which light can enter the interior of the housing 1. The housing 1 can be made of metal or non-metal, and this embodiment does not limit the material. The shape of the light inlet 11 can be oriented or circular, and those skilled in the art can set it according to actual needs; this embodiment does not limit the shape.

[0049] The first reflector 2 and the second reflector 3 are both located inside the housing 1 and are fixedly connected to the housing 1. The first reflector 2 is located in the light-emitting direction of the light inlet 11, and the second reflector 3 is located in the optical path between the light inlet 11 and the first reflector 2. The photosensitive element 4 is arranged in the light-emitting direction of the second reflector 3 and is used to receive the light reflected by the second reflector 3. The photosensitive element 4 is an image sensor.

[0050] In this way, by setting a second reflector 3 in the optical path between the light inlet 11 and the first reflector 2, the light transmitted through the light inlet 11 can be reflected by the first reflector 2 and then directed to the second reflector 3, and then reflected again by the second reflector 3 and directed to the photosensitive element 4. Compared with the technical solution where light is directly directed from the light inlet 11 to the photosensitive element 4, the technical solution provided by this disclosure increases the total optical path of the camera module (the increase in optical path is equal to the sum of the distance from the first reflector 2 to the second reflector 3 and the distance from the second reflector 3 to the photosensitive element 4) without increasing the camera module, thereby increasing the focal length of the camera module, and thus improving the image magnification of the camera module without changing the object distance.

[0051] In some possible embodiments, the second reflector 3 has the ability to block light.

[0052] like Figure 2As shown, the second reflector 3 has an anti-glare coating 100 on the side facing away from the first reflector 2. This anti-glare coating 100 can prevent light from passing through the second reflector 3. The second reflector 3 is located in the optical path between the light inlet 11 and the first reflector 2, and at least part of the optical path between the light inlet 11 and the first reflector 2 is not blocked by the second reflector 3. It is easy to understand that when light enters the housing 1 in a direction parallel to the axis of the light inlet 11, since part of the optical path between the light inlet 11 and the first reflector 2 is blocked by the second reflector 3, the remaining part is not blocked by the second reflector 3. The part of the light that is not blocked by the second reflector 3 continues to move along the axis of the light inlet 11 and is directed towards the first reflector 2. Under the reflection of the first reflector 2, this part of the light reaches the side of the second reflector 3 facing away from the light inlet 11 and is directed towards the photosensitive element 4 under the reflection of the second reflector 3.

[0053] For example, the matte coating 100 may be a magnesium fluoride coating.

[0054] In practice, an anti-glare coating 100 is applied to the side of the second reflector 3 near the light inlet 11. This prevents the side of the second reflector 3 near the light inlet 11 from reflecting the light transmitted through the light inlet 11, thereby preventing diffuse reflection of the light in the housing 1 and avoiding stray light and ghosting in the image received by the photosensitive element 4.

[0055] In some examples, such as Figure 2 As shown, the optical axes of the first reflector 2 and the second reflector 3 are coaxially arranged with the axis of the light inlet 11. The first reflector 2 and the light inlet 11 are arranged opposite each other, and their shapes and sizes are adapted to each other. That is, the projection of the light inlet 11 onto its axis coincides with the edge of the first reflector 2. The size of the second reflector 3 is smaller than that of the light inlet 11. Therefore, light enters the housing 1 in a direction parallel to the axis of the light inlet 11. The second reflector 3 can only block a portion of the light near the axis of the light inlet 11. The portion of the light far from the axis of the light inlet 11 is not blocked by the second reflector 3. This portion of the light is reflected by the first reflector 2 and reaches the side of the second reflector 3 away from the light inlet 11, and is reflected by the second reflector 3 towards the photosensitive element 4.

[0056] Optionally, the first reflecting mirror 2 can have a converging effect on light.

[0057] like Figure 2 As shown, the first reflector 2 has a groove structure 21 on the side near the second reflector 3, which can converge the reflected light toward the second reflector 3.

[0058] Specifically, see Figure 2The first reflecting mirror 2 can be a concave mirror, with the concave surface of the mirror arranged opposite to the light inlet 11, and the axis of the concave surface arranged coaxially with the axis of the light inlet 11.

[0059] In this way, light rays parallel to the axis of the light inlet 11 are directed toward the concave surface of the first reflector 2, and the first reflector 2 reflects the light rays to the second reflector 3 in a converging manner, which can increase the amount of light reflected to the second reflector 3, thereby increasing the amount of light reflected to the photosensitive element 4 and improving the imaging brightness.

[0060] It is easy to understand that when the first groove structure 21 is a concave arc surface, the radius of curvature of the concave arc surface is related to the distance between the first reflecting mirror 2 and the second reflecting mirror 3. The greater the distance between the first reflecting mirror 2 and the second reflecting mirror 3, the larger the radius of curvature of the concave arc surface; conversely, the smaller the distance between the first reflecting mirror 2 and the second reflecting mirror 3, the smaller the radius of curvature of the concave arc surface. In other words, the radius of curvature of the concave arc surface is positively correlated with the distance between the first reflecting mirror 2 and the second reflecting mirror 3.

[0061] In some possible embodiments, the optical path between the first reflector 2 and the second reflector 3 is within the range of [2mm, 10mm], that is, the distance between the geometric center of the first reflector 2 and the geometric center of the second reflector 3 is within the range of [2mm, 10mm].

[0062] For example, the optical path between the first reflector 2 and the second reflector 3 can be 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm.

[0063] In some possible embodiments, the second reflector 3 is capable of allowing light to pass through.

[0064] like Figure 3 As shown, the second reflecting mirror 3 is a polarizing reflecting mirror. Specifically, the second reflecting mirror 3 has transmission polarization directions and reflection polarization directions that are orthogonal to each other.

[0065] The transmission polarization direction refers to a specific polarization direction. When linearly polarized light has this polarization direction, the second reflecting mirror 3 will completely transmit the linearly polarized light. The reflection polarization direction refers to a specific polarization direction. When linearly polarized light has this polarization direction, the second reflecting mirror 3 will completely reflect the linearly polarized light. Light rays with different polarization directions enter the second reflecting mirror 3, and the second reflecting mirror 3 may transmit, reflect, or both simultaneously. When the polarization direction of the light ray is the same as the transmission polarization direction of the second reflecting mirror 3, the second reflecting mirror 3 can completely transmit the light ray; when the polarization direction of the light ray is the same as the reflection polarization direction of the second reflecting mirror 3, the second reflecting mirror 3 can completely reflect the light ray; when the polarization direction of the light ray is between the transmission polarization direction and the reflection polarization direction, the light ray can be orthogonally decomposed into a first component light ray and a second component light ray, wherein the polarization direction of the first component light ray is the same as the transmission polarization direction, and the polarization direction of the second component light ray is the same as the reflection polarization direction. Then, the second reflecting mirror 3 can transmit the first component light ray and reflect the second component light ray.

[0066] In practice, natural light can be considered as a superposition of countless linearly polarized lights in different directions. Therefore, the intensity of natural light is uniformly distributed and does not exhibit polarization. Correspondingly, when natural light is incident on the second reflecting mirror 3, linearly polarized light in the natural light with the same transmission polarization direction as the second reflecting mirror 3 can be completely transmitted through the second reflecting mirror 3. Linearly polarized light in the natural light with the same reflection polarization direction as the second reflecting mirror 3 can be completely reflected by the second reflecting mirror 3. Linearly polarized light in the natural light with a polarization direction between the aforementioned transmission and reflection polarization directions can be orthogonally decomposed into light rays, with some components of the light rays being transmitted through the second reflecting mirror 3 and others being reflected by the second reflecting mirror 3.

[0067] Further, see Figure 3 The camera module also includes a λ / 4 glass plate 5, which is fixed inside the housing 1 and located in the optical path between the first reflector 2 and the second reflector 3.

[0068] In practice, the λ / 4 glass plate 5 is used to adjust the polarization direction of the transmitted light by 45°, that is, the angle of polarization direction of the light passing through the λ / 4 glass plate 5 will increase by 45°.

[0069] In this way, the linearly polarized light transmitted through the second reflecting mirror 3 (the polarization direction of these linearly polarized lights is the transmission polarization direction) is transmitted through the λ / 4 glass plate 5 for the first time and reaches the first reflecting mirror 2, and is reflected by the first reflecting mirror 2. Then, the linearly polarized light is transmitted through the λ / 4 glass plate 5 for the second time. The polarization direction of the linearly polarized light transmitted through the λ / 4 glass plate 5 for the two times increases by a total of 90°. That is, the polarization direction of the linearly polarized light changes from the transmission polarization direction to the reflection polarization direction. Subsequently, all of these linearly polarized lights are reflected by the second reflecting mirror 3 and are directed toward the photosensitive element 4.

[0070] Optionally, see Figure 3 The first reflecting mirror 2 is a plane mirror, and the λ / 4 glass slides 5 are all plate-like structures. The λ / 4 glass slides 5 are located on the side of the first reflecting mirror 2 that is close to the second reflecting mirror 3, and are arranged in close contact with the first reflecting mirror 2.

[0071] In some possible embodiments, see Figures 1-3 The second reflector 3 has a plate-like structure. The normal of the second reflector 3 and the axis of the light inlet 11 are located in the same plane and the included angle is 45°.

[0072] This improves the space utilization within the camera module, which is conducive to the miniaturization of the camera module.

[0073] In some possible embodiments, the photosensitive element 4 is located outside the housing 1.

[0074] See Figure 2 or Figure 3 The housing 1 has a hollow cubic structure. A light inlet 11 is located on the first wall of the housing 1, and a light outlet 12 is located on the second wall of the housing 1. The first and second walls are adjacent to each other within the housing 1. A photosensitive element 4 is located outside the housing 1 and is arranged opposite to the light outlet 12. A second reflector 3 is located inside the housing 1 and is arranged opposite to the light outlet 12.

[0075] In practice, the light reflected by the first reflector 2 is directed to the second reflector 3, which then reflects the light towards the light outlet 12. The light then passes through the light outlet 12 and reaches the photosensitive element 4.

[0076] In some examples, the camera module also includes a drive mechanism 6.

[0077] See example 4 or Figure 5 The camera module also includes a drive mechanism 6, which drives the photosensitive element 4 to move along a first direction, a second direction and / or a third direction. The first direction is the axial direction of the light outlet 12, the second direction and the third direction are perpendicular to each other, and the second direction and the third direction are perpendicular to the first direction respectively.

[0078] Specifically, the drive mechanism 6 can be a voice coil motor. A coil is installed inside the voice coil motor, and the photosensitive element 4 is housed within the voice coil motor. In implementation, by controlling the current flowing through the coil, the photosensitive element 4 can be controlled to move along the axis of the light outlet 12 to achieve the focusing function of the camera module. By controlling the current flowing through the coil, the photosensitive element 4 can be controlled to move in a plane perpendicular to the axis of the light outlet 12 (i.e., a plane defined by the second and third directions) to achieve the image stabilization function of the camera module.

[0079] The first reflector 2 and the second reflector 3 can both be fixed inside the housing 1 by adhesive bonding, or the first reflector 2 and the second reflector 3 can both be fixed inside the housing 1 by snap-fit. This embodiment does not limit the specific method used.

[0080] In some possible embodiments, the camera module is a periscope camera module.

[0081] like Figure 6 or Figure 7 As shown, the housing 1 is a hollow cubic structure. The first wall of the housing 1 has a light inlet 11, and the third wall of the housing 1 has a light outlet 12. The third wall and the first wall are two opposite walls in the housing 1. The axes of the light inlet 11 and the light outlet 12 are parallel, and the axis of the light inlet 11 is perpendicular to the axis of the first reflector 2.

[0082] Furthermore, the camera module also includes a third reflector 7, which is located inside the housing 1 and is fixedly connected to the housing 1. The third reflector 7 is located in the light-emitting direction of the light inlet 11, while the first reflector 2 is located in the light-emitting direction of the third reflector 7.

[0083] In implementation, see Figure 6 The light transmitted through the light inlet 11 is reflected by the third reflector 7 and then shines on the second reflector 3. Part of the light is absorbed by the matte coating 100 on the second reflector 3, and the remaining part of the light continues to shine on the first reflector 2. The first reflector 2 then reflects this part of the light, and the reflected light passes through the light outlet 12 after being reflected by the second reflector 3, and reaches the photosensitive element 4.

[0084] In implementation, see Figure 7The light transmitted through the light inlet 11 is reflected by the third reflecting mirror 7 and then shines on the second reflecting mirror 3. The second reflecting mirror 3 is a polarizing reflecting mirror, which can transmit a portion of the light. The portion of the light transmitted through the second reflecting mirror 3 passes through the λ / 4 glass plate 5 and reaches the first reflecting mirror 2. After being reflected by the first reflecting mirror 2, this portion of light is transmitted through the λ / 4 glass plate 5 again and reaches the second reflecting mirror 3. Since the polarization angle of the light increases by 45° each time it is transmitted through the λ / 4 glass plate 5, the polarization direction of the light that reaches the second reflecting mirror 3 again is consistent with the polarization direction of the reflection of the second reflecting mirror 3. The second reflecting mirror 3 reflects all of this portion of light. After being reflected by the second reflecting mirror 3, this portion of light passes through the light outlet 12 and reaches the photosensitive element 4.

[0085] The third reflecting mirror 7 can be a mirror or a prism; this disclosure does not limit the specific mirror to either.

[0086] By adopting the technical solution provided in the embodiments of this disclosure, the camera module can be tilted and installed inside the electronic device by utilizing the reflection effect of the third reflecting mirror 7. That is, the camera module is used as a periscope camera module inside the electronic device, which is beneficial to the thinner and lighter design of the electronic device.

[0087] In some possible embodiments, the housing 1 has a cylindrical structure.

[0088] like Figure 8 As shown, the housing 1 has a cylindrical structure, and the light inlet 11 is located on the side wall of the cylindrical structure.

[0089] By placing the light inlet 11 on the side wall of the cylindrical housing 1, the amount of light entering the light inlet 11 can be increased within the same size, thereby increasing the amount of light that the photosensitive element 4 can receive and improving the imaging brightness of the camera module.

[0090] In this example, the shape of the light inlet 11 can be elliptical, circular, or square; this embodiment of the present disclosure does not limit the shape of the light inlet 11.

[0091] The technical solution provided in this disclosure includes at least the following beneficial effects:

[0092] This disclosure provides a camera module in which a second reflector 3 is disposed in the optical path between the light inlet 11 and the first reflector 2. This allows light transmitted through the light inlet 11 to be reflected by the first reflector 2, then directed to the second reflector 3, and subsequently reflected again by the second reflector 3 before reaching the photosensitive element 4. Compared to a technical solution where light travels directly from the light inlet 11 to the photosensitive element 4, the technical solution provided in this disclosure increases the total optical path of the camera module (the increase in optical path is equal to the sum of the distance from the first reflector 2 to the second reflector 3 and the distance from the second reflector 3 to the photosensitive element 4) without increasing the number of camera modules. This increases the focal length of the camera module, thereby improving the image magnification of the camera module without changing the object distance.

[0093] This disclosure also provides an electronic device that includes the camera module described above.

[0094] In the embodiments of this disclosure, the electronic device can be a smartphone, tablet computer, laptop computer, or other electronic device with communication functions. This disclosure does not specifically limit the specific technology or specific device form used in the electronic device.

[0095] In the description of this specification, the references to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the embodiments or examples that are included in at least one embodiment or example of this disclosure.

[0096] It is understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0097] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0098] It is further understood that the terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0099] It is further understood that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the two components; they can refer to a direct connection between two components without the presence of other components, or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0100] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0101] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the solutions disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following scope of claims.

[0102] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A camera module, characterized in that, The camera module includes a housing (1), a first reflector (2), a second reflector (3), and a photosensitive element (4); The housing (1) has a light inlet (11); The first reflector (2) and the second reflector (3) are respectively fixed inside the housing (1), and the second reflector (3) is located in the optical path between the light inlet (11) and the first reflector (2); The light transmitted through the light inlet (11) is reflected by the first reflector (2) and the second reflector (3) in sequence before illuminating the photosensitive element (4).

2. The camera module according to claim 1, characterized in that, At least a portion of the optical path between the light inlet (11) and the first reflector (2) is not blocked by the second reflector (3); The second reflector (3) has an anti-glare coating (100) on the side opposite to the first reflector (2).

3. The camera module according to claim 2, characterized in that, The first reflector (2) has a groove structure (21) on the side near the second reflector (3), which can converge the reflected light towards the second reflector (3).

4. The camera module according to claim 1, characterized in that, The camera module also includes a λ / 4 glass plate (5), which is fixed inside the housing (1) and located in the optical path between the first reflector (2) and the second reflector (3); The second reflector (3) is a polarizing reflector.

5. The camera module according to claim 1, characterized in that, The housing (1) also has a light outlet (12), which is located in the light-emitting direction of the second reflector (3); The photosensitive element (4) is located outside the housing (1) and is arranged opposite to the light outlet (12).

6. The camera module according to claim 5, characterized in that, The camera module further includes a driving mechanism (6), which is used to drive the photosensitive element (4) to move along a first direction, a second direction and / or a third direction. The first direction is the axial direction of the light outlet (12), the second direction and the third direction are perpendicular to each other, and the second direction and the third direction are perpendicular to the first direction respectively.

7. The camera module according to claim 1, characterized in that, The orientation of the light inlet (11) is perpendicular to the axis of the first reflector (2); The camera module also includes a third reflector (7), which is fixed inside the housing (1) and located in the light-emitting direction of the light inlet (11); The first reflector (2) is located in the light-emitting direction of the third reflector (7).

8. The camera module according to claim 7, characterized in that, The housing (1) has a cylindrical structure, and the light inlet (11) is located on the side wall of the cylindrical structure.

9. The camera module according to claim 1, characterized in that, The optical path between the first reflector (2) and the second reflector (3) is within the range of [2 mm, 10 mm].

10. An electronic device, characterized in that, The electronic device includes a camera module as described in any one of claims 1 to 9.

Images