Reflection module and periscopic camera module thereof

Abstract

The invention discloses a reflection module and a periscopic camera module thereof, and belongs to the field of camera modules. A reflective module includes a reflective element that reflects light propagating along a first optical axis to light propagating along a second optical axis; a movable carrier carrying the reflective element; comprising a shading structure, a light transmitting part and a bearing part. Wherein the bearing part is provided with a through hole, the light-transmitting part and the through hole of the bearing part are coaxially arranged along a first optical axis, the light-transmitting part and the reflecting element are oppositely arranged along the first optical axis direction, the light-transmitting part and the shading structure are located on the light inlet side of the reflecting module, and the projection of the shading structure along the first optical axis direction annularly surrounds the projection edge of the light-transmitting part along the first optical axis direction. Therefore, the light incoming amount of the edge of the light-transmitting part is limited. The reflection module and the periscopic camera module provided by the invention have the advantages of good imaging quality and reduction of stray light.

Description

Technical Field

[0001] The present application relates to a periscope camera module, and more specifically to a reflection module and a periscope camera module thereof. Background Art

[0002] High-power optical zoom is an important trend in the development of smartphone camera technology. Due to consumers' demand for thin and light smartphones, periscope camera modules are used in mobile phone camera technology to make long-distance zoom possible. Existing periscope camera modules usually use prisms or reflectors to reflect light. The reflector reflects through the reflective surface and does not need to use high-density medium to low-density medium for total reflection like a prism. Although the reflection efficiency of the reflector may be 2% to 5% lower than the total reflection of the prism, because the reflector is thinner than the prism, a smaller periscope camera module can theoretically be achieved.

[0003] However, since the incident light in the camera module is prone to generate stray light during propagation, on the other hand, the propagation path of the light deviates greatly from the expected path, which in turn leads to a decrease in the imaging quality of the camera module. Summary of the invention

[0004] One purpose of the present application is to provide a reflection module to reduce the incidence of oblique light, reduce the generation of stray light, and further improve the imaging quality of the camera module.

[0005] Another object of the present application is to provide a periscope camera module having the above-mentioned reflection module.

[0006] To achieve the above objectives, the technical solution adopted in the present application is: a reflection module, comprising a reflection element and a movable carrier, wherein the reflection element is capable of reflecting light propagating along a first optical axis to propagate along a second optical axis; the movable carrier carries the reflection element; and is characterized in that it further comprises a hole-limiting component, wherein the hole-limiting component comprises a light-shielding structure, a light-transmitting component and a supporting component, wherein the supporting component is provided with a through hole, the light-transmitting component and the through hole of the supporting component are coaxially arranged along the first optical axis, the light-transmitting component and the reflection element are relatively arranged along the first optical axis direction, the light-transmitting component and the light-shielding structure are located on the light-incoming side of the reflection module, and the projection of the light-shielding structure along the first optical axis direction annularly surrounds the projection edge of the light-transmitting component along the first optical axis direction, thereby limiting the amount of light entering the edge of the light-transmitting component.

[0007] Preferably, the projection of the shading structure along the first optical axis at least partially covers the edge of the light-transmitting member; and / or the light-transmitting member is arranged on the inner side of the shading structure in an edge-to-edge manner along the second optical axis; wherein the reflectivity of the shading structure is less than 5%.

[0008] Preferably, the shading structure includes a pair of long side segments and a pair of short side segments, the long side segments and the short side segments are integrally connected along the edge of the light-transmitting member, the short side segments are relatively arranged along the width direction of the reflection module, and the long side segments are relatively arranged along the second optical axis, and the width direction of the reflection module is perpendicular to the first optical axis and the second optical axis.

[0009] As a preference, the ring width of the short side segment is greater than the ring width of the long side segment.

[0010] Preferably, the long side segment includes a first long side segment and a second long side segment, the first long side segment is far away from the lens module along the second optical axis, the second long side segment is close to the lens module along the second optical axis, and the ring width of the first long side segment is greater than the ring width of the second long side segment.

[0011] Preferably, the first long side segment is a straight segment, and the second long side segment extends in an arc shape toward the lens module relative to the first long side segment, so that the distance between the first long side segment and the movable field of view is smaller than the distance between the second long side segment and the movable field of view.

[0012] Preferably, the carrier carries the light-transmitting member and / or the light-shielding structure, and an inner surface of the carrier is provided with an anti-reflection structure so that the reflectivity of the inner surface of the carrier is less than 5%.

[0013] Preferably, the reflection module further comprises a tip portion which is at least partially annularly arranged at the inner boundary of the light-shielding structure, wherein the tip portion faces the central axis point of the plane of the light-transmitting member along the second optical axis direction.

[0014] Preferably, the hole-limiting member further includes a first light-shielding member and / or a second light-shielding member, the light-shielding structure is formed on the first light-shielding member, the first light-shielding member is located above the light-transmitting member, and the projection of the first light-shielding member along the first optical axis direction at least partially covers the edge of the light-transmitting member; and / or the light-shielding structure is formed on the second light-shielding member, the second light-shielding member supports the light-transmitting member, and the projection of the second light-shielding member along the first optical axis direction annularly surrounds the edge of the light-transmitting member.

[0015] Preferably, the reflectivity of the first light-shielding member is less than 5%, and the ratio of the height h1 between the first light-shielding member and the upper surface of the light-transmitting member to the thickness h2 of the light-transmitting member is: 1 / 3≤h1:h2≤3.

[0016] Preferably, the second light shading member is fixedly connected to the movable carrier, and the second light shading member includes a first supporting portion, a second supporting portion and a pair of side blocking portions, the first supporting portion extends in a plane perpendicular to the direction of the first optical axis, the second supporting portion extends in a plane perpendicular to the direction of the second optical axis, and the side blocking portions extend in a plane parallel to the direction of the first optical axis and the direction of the second optical axis, so as to laterally connect the first supporting portion and the second supporting portion, the first supporting portion faces the light input side of the reflection module, so as to support the light-transmitting member, and the light shading structure is formed on the first supporting portion, so that the reflectivity of the first supporting portion is less than 5%.

[0017] As a preference, the side blocking portions are relatively arranged along the width direction of the reflective module, the side blocking portions are provided with side inner walls, and the side inner walls have an anti-reflection structure, so that the reflectivity of the side inner walls is less than 5%.

[0018] Preferably, the movable carrier includes a mounting surface and an extension wall, the extension wall extends upward from both sides of the mounting surface, the mounting surface is fixedly connected to the reflective element, the extension wall is provided with a mounting edge and an inner wall surface, the mounting edge is obliquely attached to the side stopper, the inner wall surface faces the reflective element, and the inner wall surface has an anti-reflection structure so that the reflectivity of the inner wall surface is less than 5%.

[0019] Preferably, the reflection module further includes a collimator lens, the second support portion faces the light emitting side of the reflection module, and the collimator lens is installed on the second support portion so that the reflection element is arranged between the light-transmitting member and the collimator lens, wherein the light-transmitting member has a positive optical focal length for focusing the light, and the collimator lens has a negative optical focal length for expanding the light.

[0020] Preferably, the first light shading member and the second light shading member are respectively located on both sides of the light transmitting member along the direction of the first optical axis, the upper surface of the first light shading member is higher than the upper surface of the light transmitting member, the second light shading member covers the first light shading member along the projection direction of the first optical axis, and the gap between the second light shading member and the light transmitting member is smaller than the gap between the first light shading member and the light transmitting member, wherein the light transmitting member is adhered to the second light shading member, and the bonding thickness between the second light shading member and the light transmitting member is 30μm-100μm.

[0021] Preferably, the first light-shielding member is provided with a first long side segment and a second long side segment, the first long side segment and the second long side segment are arranged opposite to each other along the second optical axis direction, the first long side segment is far away from the lens module, the second long side segment is close to the lens module, and the distance between the first long side segment and the central axis of the reflective element is smaller than the distance between the second long side segment and the central axis of the reflective element.

[0022] Preferably, the reflection module further includes a driving module, the rotation axis of the driving module passes through the center axis point of the reflection element, and the driving module drives the reflection element and the second shading member to rotate synchronously, so that the distance between the center axis point of the reflection element and the lens module is the same as a preset value Ly.

[0023] Preferably, the first shading member may be attached around the through hole of the carrier or the edge of the upper surface of the light-transmitting member, wherein the aperture of the light-transmitting member is greater than (tanα)×L3+(tanα)×L1+Lf, Lf=√2L / 2, α is the field of view angle of the camera module along the first optical axis, L is the total length of the reflective surface in the reflective element, L1 is the effective length of the reflective surface, and L3 is the distance between the shading member and the end of the reflective surface away from the light-transmitting member projected along the first optical axis.

[0024] In order to achieve one of the objectives of the present application, the technical solution adopted in the present application is a camera module, comprising any of the above-mentioned reflection modules; a lens module, the lens module is maintained on the light reflection path of the reflection module; a photosensitive module, the photosensitive module receives the light emitted by the lens module for imaging; a driving module, the driving module is used to drive the movable carrier to rotate; and a base, the base has a accommodating cavity, the reflection module and the lens module are arranged in the accommodating cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of some exemplary periscope camera modules in this application.

[0026] Figure 2 Exploded views of some exemplary periscope camera modules in this application.

[0027] Figure 3A Schematic diagram of the structure of some hole-limiting components in this application.

[0028] Figure 3B Schematic diagram of the structure of some hole-limiting components in this application.

[0029] Figure 3C Schematic diagram of the structure of some hole-limiting components in this application.

[0030] Figure 3D Schematic diagram of the structure of some hole-limiting components in this application.

[0031] Figure 3E Schematic diagram of the structure of some hole-limiting components in this application.

[0032] Figure 3F Schematic diagram of the structure of other hole-limiting components in this application.

[0033] Figure 4A Schematic diagram of the structure of some hole-limiting components in this application.

[0034] Figure 4B Schematic diagram of the structure of other hole-limiting components in this application.

[0035] Figure 5 Schematic diagram of the structure of some hole-limiting components in this application.

[0036] Figure 6 Schematic diagram of the structure of some shading elements in this application.

[0037] Figure 7 Schematic diagram of the structure of some shading elements in this application.

[0038] Figure 8 Cross-sectional views of some periscope camera modules in this application.

[0039] Fig. 9 It is a cross-sectional view of some hole-limiting components in this application.

[0040] Fig.10 These are cross-sectional views of some periscope camera modules in this application.

[0041] Fig.11 Schematic diagram of the structure of some second shading members in this application.

[0042] Fig.12 Schematic diagram of the structure of some second shading members in this application.

[0043] Fig.13 Exploded diagram of some periscope camera modules in this application.

[0044] Fig.14 Cross-sectional views of some periscope camera modules in this application.

[0045] Fig.15 These are cross-sectional views of some periscope camera modules in this application.

[0046] Fig.16 Cross-sectional views of some periscope camera modules in this application.

[0047] Fig.17 Cross-sectional views of some periscope camera modules in this application.

[0048] Fig.18 It is a stereoscopic image of some periscope camera modules in this application.

[0049] Fig.19 These are stereoscopic images of some periscope camera modules in this application.

[0050] In the figure: 1, reflection module; 2, camera module; 10, hole-limiting member; 100, shading structure; 11, first shading member; 111, long side segment; 112, short side segment; 113, first long side segment; 114, second long side segment; 115, inner long side segment; 116, outer long side segment; 117, inner arc segment; 118, outer arc segment; 12, second shading member; 121, first supporting portion; 122, first through hole; 123, second supporting portion; 124, second through hole; 125. Side blocking portion; 126. Side inner wall; 13. Light-transmitting member; 131. Collimating lens; 141. Anti-reflection surface; 15. Movable field of view; 16. Tip; 20. Reflection element; 21. First end; 22. Second end; 200. Reflection surface; 30. Movable carrier; 31. Mounting surface; 32. Extension wall; 321. Mounting edge; 322. Inner wall surface; 40. Driving module; 50. Base; 51. Carrying member; 60. Lens module; 70. Photosensitive module. DETAILED DESCRIPTION

[0051] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0052] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0053] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0054] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0055] According to one aspect of the present application, a reflection module 1 is provided, such as Figure 1 and Figure 2 As shown, the reflection module 1 can be applied to a camera module 2, especially to a periscope camera module 2 with a micro multi-lens structure that is sensitive to the angle of incident light. Further, the reflection module 1 includes a reflection element 20, a movable carrier 30 and a hole-limiting member 10.

[0056] The reflective element 20 is used to reflect the light propagating along the first optical axis OA1 to propagate along the second optical axis OA2. The reflective element 20 can fold the light path, which can effectively reduce the height of the camera module 2 in the direction of the first optical axis OA1, reduce the occupied space and production cost, and further meet the requirements of lightweight design for electronic devices.

[0057] The movable carrier 30 is used to carry the reflective element 20 , and the reflective element 20 is driven by the movable carrier 30 to achieve relative movement or move together with the hole-limiting component 10 , while being adapted to various application environments, further reducing the generation of stray light and enhancing the imaging quality of the camera module 2 .

[0058] The aperture-limiting component 10 further includes a light-shielding structure 100, a light-transmitting member 13, and a carrier 51, wherein the carrier 51 is provided with a through hole, the through holes of the light-transmitting member 13 and the carrier 51 are coaxially arranged along the first optical axis OA1, the light-transmitting member 13 and the reflective element 20 are arranged relatively along the first optical axis OA1, the light-transmitting member 13 and the light-shielding structure 100 are located on the light-incoming side of the reflective module 1, and the projection of the light-shielding structure 100 along the first optical axis OA1 annularly surrounds the projection edge of the light-transmitting member 13 along the first optical axis OA1, thereby limiting the amount of light entering the edge of the light-transmitting member 13. The aperture-limiting component 10 provided in the present application is conducive to reducing the amount of incident light of the deflected angle, reducing the generation of stray light, and further enhancing the imaging quality of the camera module 2.

[0059] Further, due to the cavity structure between the reflective module 1 and the base 50 in the camera module, stray light is easily generated when the deflected light is reflected in the cavity. Specifically, after the deflected light is reflected by the side wall of the driving module 40, unexpected light may be generated, and after the deflected light is transmitted through a complex optical path, it is finally received by the photosensitive module 70, resulting in a decrease in image quality. It is understandable that when the incident angle of the deflected light is between 20° and 50°, the deflected light is more likely to produce a reflection phenomenon in the cavity in the camera module 2 provided with the reflective element 20. In addition, when the reflective element 20 is mounted on the movable carrier 30 for anti-shake function, due to the change in the position of the reflective element 20, the risk of stray light generated between the reflected light in the cavity and the reflective element 20 increases. In particular, when the anti-shake function is used to shoot point light sources such as street lamps at night, the probability of the reflected light being received by the photosensitive module 70 is greatly increased, increasing the risk of stray light generation, and further reducing the imaging quality of the camera module 2.

[0060] Specifically, when a prism is used as an optical path turning element in the reflective element 20, its surface is usually polished and may be coated with an anti-reflective coating to reduce the reflection phenomenon of light on the surface. On the one hand, the prism structure is relatively simple, and the light passes through fewer interfaces when propagating, so the risk of stray light is relatively small. On the other hand, when a micro multi-lens structure is used as an optical path turning element, it is beneficial to reduce the shoulder height of the camera module 2 and reduce the occupied space of the camera module 2. However, since each lens has two surfaces, the light will produce reflections on the front and back surfaces when passing through each lens. Therefore, even if the reflectivity of each lens surface is low, after multiple lenses are superimposed, the accumulated stray light may increase significantly. In addition, the number of lenses in the micro multi-lens structure is large, and the assembly accuracy of the camera module 2 is required to be higher, so a slight installation deviation may cause more light reflection or scattering inside, thereby reducing the imaging quality of the camera module 2. Therefore, reducing the incidence of deflected light can further reduce the risk of stray light.

[0061] Among them, Figure 1 As shown, the first optical axis OA1 passes through the light-transmitting member 13 and the reflective element 20, that is, parallel to the incident direction of the light beam, the second optical axis OA2 is parallel to the exit direction of the light beam, and the third axis A3 is perpendicular to the first optical axis OA1 and the second optical axis OA2. Specifically, the height direction of the reflective module 1 is parallel to the first optical axis OA1, the length direction of the reflective module 1 is parallel to the second optical axis OA2, and the width direction of the reflective module 1 is parallel to the third axis A3. It can be understood that the setting of the coordinate system can be flexibly set according to actual needs, and is not limited here.

[0062] The aforementioned “the projection of the shading structure 100 along the first optical axis OA1 surrounds the projection edge of the light-transmitting member 13 along the first optical axis OA1 in an annular manner” can be understood as the shading structure 100 is arranged on the upper side and / or lower side of the light-transmitting member 13 along the first optical axis OA1, and at least a portion of the projection of the shading structure 100 along the first optical axis OA1 can surround the projection edge of the light-transmitting member 13 along the first optical axis OA1. Further, as mentioned above, “surrounding in an annular manner” can mean that the shading structure 100 covers the edge of the light-transmitting member 13 along the first optical axis OA1, or the shading structure 100 surrounds the edge of the light-transmitting member 13 along the second optical axis OA2, and the shading structure 100 can be arranged on the upper side, lower side or periphery in the same horizontal direction of the light-transmitting member 13 along the first optical axis OA1.

[0063] Specifically, Figure 3AAs shown, the projection edge of the light shielding structure 100 along the first optical axis OA1 can overlap with the projection edge of the light-transmitting member 13 along the first optical axis OA1, further reducing the possibility of stray light incident. Figure 6 and Figure 7 As shown, a projection edge of the shading structure 100 along the first optical axis OA1 and a projection edge of the light-transmitting element 13 along the first optical axis OA1 may have a slight gap to reduce the blocking effect of the shading structure 100 on the light-transmitting element 13 and facilitate the transmission of incident light.

[0064] In at least one specific embodiment, Figure 3B As shown, the shading structure 100 can be arranged in the same plane as the light-transmitting member 13 along the second optical axis OA2 and surround the edge of the light-transmitting member 13, so that at least a portion of the projection of the light-shading structure 100 along the first optical axis OA1 can surround or cover the projection edge of the light-transmitting member 13 along the first optical axis OA1, further reducing the risk of stray light incidence.

[0065] In at least one specific embodiment, Figure 3C and Figure 3D As shown, the shading structure 100 and the light-transmitting member 13 are arranged side by side on the inner side of the shading structure 100 along the second optical axis OA2. Specifically, the shading structure 100 can be arranged on the upper side or the lower side of the light-transmitting member 13 along the first optical axis OA1 to improve the adaptability of the camera module 2 in use environments with different shading requirements. The reflectivity of the shading structure 100 is less than 5% to reduce the risk of reflection of incident light.

[0066] In at least one embodiment, Figure 3E As shown, at least a portion of the projection of the shading structure 100 along the first optical axis OA1 falls within the projection of the light-transmitting member 13 along the first optical axis OA1, and the possibility of stray light incidence is further reduced by enhancing the connection performance between the shading structure 100 and the light-transmitting member 13 in the direction of the first optical axis OA1.

[0067] In at least one embodiment, Figure 3F As shown, at least a portion of the projection boundaries of the light shielding structure 100 and the light-transmitting member 13 along the second optical axis OA2 overlap each other, so that the light shielding structure 100 and the light-transmitting member 13 are in contact with each other. The adjacently arranged light shielding structure 100 and the light-transmitting member 13 have a good blocking effect on unexpected deflected light, which is beneficial to improving the imaging quality of the camera module 2 and further enhancing the market competitiveness.

[0068] In some embodiments, Figure 4AAs shown, the shading structure 100 includes a pair of long side segments 111 and a pair of short side segments 112. The long side segments 111 and the short side segments 112 are integrally connected along the edge of the light-transmitting member 13. The short side segments 112 are relatively arranged along the width direction of the reflection module 1, and the long side segments 111 are relatively arranged along the second optical axis OA2, which is beneficial to reduce the shielding phenomenon of the light-transmitting member 13 caused by the shading structure 100, is beneficial to the normal incidence of light, and further enables the camera module 2 to form an image normally.

[0069] In some embodiments, reference Figure 4B As shown, the long side segment 111 includes an inner long side segment 115 and an outer long side segment 116, wherein the inner long side segment 115 is close to the incident position of the light along the second optical axis OA2, and the outer long side segment 116 is far away from the incident position of the light along the second optical axis OA2. The short side segment 112 includes an inner arc segment 117 and an outer arc segment 118, wherein the inner arc segment 117 is close to the incident position of the light along the third axis A3, and the outer arc segment 118 is far away from the incident position of the light along the third axis A3. The inner long side segment 115 and the inner arc segment 117, and the outer long side segment 116 and the outer arc segment 118 are connected by arc extension, wherein the distance between the inner long side segments 115 is t1, and the distance between the inner arc segments 117 is t2, and further, the ratio of t2 / t1 satisfies: 1<t2 / t1≤1.5. It is understandable that when the length of the long side of the photosensitive chip set along the first optical axis OA1 is greater than the length of the short side set along the third axis A3, the field of view in the long side direction will be significantly greater than the field of view in the short side direction. When the field of view of the long side is larger, the risk of incident stray light will increase, thereby reducing the imaging quality of the camera module 2. In other words, due to the arc-shaped runway structure formed by the long side segment 111 and the short side segment 112 at this time, the phenomenon of inconsistent field of view in the long and short side directions caused by the inconsistency of the long and short sides of the photosensitive chip can be reduced, further enhancing the imaging quality.

[0070] In some embodiments, Figure 4A As shown, the ring width of the short side segment 112 is greater than the ring width of the long side segment 111. Among them, the side segment of the photosensitive chip set parallel to the third axis A3 is the long side, and the side segment set parallel to the first optical axis OA1 is the short side. When the field of view angle in the long side direction of the photosensitive chip is large, the risk of stray light incident will increase, thereby reducing the imaging quality of the camera module 2. Therefore, by increasing the ring width of the short side segment 112, the width of the shading structure 100 in the direction of the third axis A3 is increased, and the width difference between the long side segment 111 and the short side segment 112 of the shading structure 100 in the second optical axis OA2 direction and the third axis A3 direction is reduced, and the risk of stray light incident in the long side direction of the photosensitive chip is further eliminated, thereby improving the imaging quality of the camera module 2.

[0071] In some embodiments, Figure 4BAs shown, the long side segment 111 includes a first long side segment 113 and a second long side segment 114, the first long side segment 113 is away from the lens module 60 along the second optical axis OA2, the second long side segment 114 is close to the lens module 60 along the second optical axis OA2, and the ring width of the first long side segment 113 is greater than the ring width of the second long side segment 114. By increasing the ring width of the first long side segment 113, the incident amount of the deflected light on the side away from the lens module 60 can be reduced, thereby reducing the influence of stray light on the side away from the lens module 60, and improving the imaging quality and stability of the camera module 2.

[0072] refer to Figure 5 As shown, in some embodiments, the first long side segment 113 is a straight segment, and the second long side segment 114 extends in an arc shape relative to the first long side segment 113 toward the direction of the lens module 60, so that the distance between the first long side segment 113 and the movable field of view area 15 is smaller than the distance between the second long side segment 114 and the movable field of view area 15. Specifically, in the direction of the first optical axis OA1, the reflection module 1 includes a movable field of view area 15, which is an imaginary area in the shape of a runway inside the light-transmitting member 13, and the outer boundary shape of the movable field of view area 15 can be adapted to the boundary shape of the light-transmitting member 13, so as to avoid the light-transmitting member 13 from blocking the movable field of view area 15, which is beneficial to the normal imaging process of the camera module 2. In other words, since the incident light on the side close to the lens module 60 is more difficult to be reflected by the reflective element 20, by setting the second long side segment 114 to an arc shape, it is beneficial to adjust the position of the movable field of view 15 relative to the light-transmitting member 13, thereby enabling the active calibration process of the reflective element 20 relative to the light-transmitting member 13 to be realized, and it is beneficial to adjust the direction of the reflective element 20 along the side close to the lens module 60. Furthermore, the spacing between the first long side segment 113 of the shading structure 100 and the movable field of view area 15 along the second optical axis OA2 is set to a1, and the spacing between the second long side segment 114 of the shading structure 100 and the movable field of view area 15 along the second optical axis OA2 is set to b1. When a1<b1, it is beneficial to enhance the positional tightness between the edge of the light-transmitting structure on the side away from the lens module 60 and the movable field of view area 15, so as to enhance the shading performance on the side away from the lens module 60, while reducing the risk of generating stray light, the position of the movable field of view area 15 relative to the shading structure 100 can be calibrated and adjusted, thereby further enhancing the imaging quality of the camera module 2.

[0073] In some embodiments, Figure 6As shown, the reflective module 1 further includes a tip 16 that is at least partially annularly arranged on the inner boundary of the shading structure 100, wherein the tip 16 faces the mid-axis point of the plane of the light-transmitting member 13 along the second optical axis OA2. Since the tip 16 has a small blocking effect on the incident light, even if the tip 16 extends to fit the boundary of the movable field of view 15, the viewing angle and light throughput of the camera module 2 will not be significantly affected. It can be understood that the tip 16 can block unexpected light incidence and reduce the generation of stray light. Therefore, the tip 16 provided inside the shading structure 100 can reduce the risk of stray light generation without affecting the viewing angle of the camera module 2, thereby improving the imaging quality of the camera module 2.

[0074] In some embodiments, Figure 7 As shown, the tip 16 can also be provided only on the inner half of the light shielding structure 100 on the side away from the lens module 60. It can be understood that the provided tip 16 can block unexpected light incidence and reduce the phenomenon of stray light generation. Specifically, since the tip 16 is only provided on the side away from the lens module 60, it is helpful to improve the situation that the incident light on the side close to the lens module 60 is difficult to be reflected by the reflective element 20. It can be understood that the movable field of view area 15 can be further offset and adjusted toward the side close to the lens module 60 through the tip 16 provided on one side, thereby reducing the possibility of stray light entering the reflective module, and further enhancing the imaging quality of the camera module 2 while having a higher resolution.

[0075] In some embodiments, Figure 2As shown, the aperture limiting member 10 further includes a first light shielding member 11 and a second light shielding member 12, a light shielding structure 100 is formed on the first light shielding member 11, and the first light shielding member 11 is arranged above the light-transmitting member 13 along the first optical axis OA1, wherein the projection of the first light shielding member 11 along the first optical axis OA1 at least partially covers the edge of the light-transmitting member 13; and a light shielding structure 100 is formed on the second light shielding member 12, and the second light shielding member 12 carries the light-transmitting member 13, and the projection of the second light shielding member 12 along the first optical axis OA1 annularly surrounds the edge of the light-transmitting member 13. By setting the first light shielding member 11 as the upper light shielding structure 100, the incident amount of light at an unexpected incident angle is reduced, and the risk of generating stray light is reduced. Furthermore, by setting the second light shielding member 12 as the lower light shielding structure 100, since the projection of the second light shielding member 12 along the direction of the first optical axis OA1 can cover the projection of the first light shielding member 11 along the direction of the first optical axis OA1, the stray light phenomenon caused by the incident angle of the light can be reduced. On the other hand, since the second light shielding member 12 can also serve as a supporting element for the light-transmitting member 13, it is beneficial to enhance the optical path stability of the incident light and further improve the imaging quality of the camera module 2. On the other hand, the light shielding structure 100 provided in an annular shape is beneficial to protect the edge of the light-transmitting member 13 from collision or scratches, and plays a buffering role when it is subjected to external pressure, further reducing the deformation of the light-transmitting member 13 caused by mechanical stress or the optical axis deviation phenomenon, extending the service life of the camera module 2, and enhancing the mechanical properties of the camera module 2.

[0076] In some embodiments, the aperture-limiting member 10 includes a first light shielding member 11, and the light shielding structure 100 is formed on the first light shielding member 11. The first light shielding member 11 is located above the light-transmitting member 13, and the projection of the first light shielding member 11 along the first optical axis OA1 at least partially covers the edge of the light-transmitting member 13. Since the first light shielding member 11 is disposed around the upper side of the light-transmitting member 13 along the first optical axis OA1, the deflected light is blocked before the incident light enters the reflective element 20, thereby further reducing the risk of stray light generation and improving the imaging quality and imaging stability of the camera module 2.

[0077] In some embodiments, Figure 8 and Fig. 9 As shown, the ratio of the height h1 between the first light shielding member 11 and the upper surface of the light-transmitting member 13 to the thickness h2 of the light-transmitting member 13 is: 1 / 3≤h1:h2≤3. When the incident light angle is constant, the larger the value of h1, the smaller the area range of the incident light that can be incident on the light-transmitting member 13 after being blocked by the light-shielding structure 100, and when the smaller the value of h1, the larger the area range of the incident light that can be incident on the light-transmitting member 13 after being blocked by the light-shielding structure 100.

[0078] It is understandable that if Fig.10As shown, the incident light that can be incident on the other side of the shading structure 100 and then enter the reflective element 20 is set as the edge light, wherein the incident angle of the edge light is β. When the angle between the edge light and the light of the imaging viewing angle is small, that is, when the value of h1 is high, the risk of stray light in the camera module 2 is small. However, when the value of h1 is too high, that is, when the height of the shading structure 100 along the first optical axis OA1 is too large, the occupied space of the camera module 2 is further increased. Therefore, the present application selects appropriate h1 and h2 values ​​to reduce the incidence of deflected light while also reducing the height of the camera module 2 along the first optical axis OA1, which is conducive to meeting the requirements of the thin and light design of the camera module 2. On the other hand, it is conducive to improving the risk of increased aberrations such as field curvature and coma caused when the β value is large. By designing the height of the shading structure 100, the incident angle of the incident light is limited, the refraction deviation of the edge light is further reduced, and the sharpness and consistency of the edge of the imaging picture are improved.

[0079] In other words, since the shading structure 100 has a certain height, it is helpful to block external particles from entering the camera module 2, and improve the phenomenon that dust or liquid invades the interior of the camera module 2 and adheres to the surface of the light-transmitting component 13 of devices that are used more outdoors, such as mobile phones, resulting in spots or fogging during imaging.

[0080] In some embodiments, the first light shielding member 11 is provided with a first long side segment 113 and a second long side segment 114, the first long side segment 113 and the second long side segment 114 are arranged opposite to each other along the second optical axis OA2 direction, the first long side segment 113 is far away from the lens module 60, the second long side segment 114 is close to the lens module 60, and the distance between the first long side segment 113 and the central axis of the reflective element 20 is less than the distance between the second long side segment 114 and the central axis of the reflective element 20. By shortening the distance between the first long side segment 113 and the central axis of the reflective element 20, it is helpful to improve the effect of the first light shielding member 11 on the side away from the lens module 60 in blocking the incident angled light, and further improve the imaging quality of the camera module 2.

[0081] In some embodiments, the reflectivity of the first shading member 11 is less than 5%. By reducing the reflectivity of the first shading member 11, it is beneficial to generate diffuse reflection on the surface of the first shading member 11, further reducing the risk of stray light generated by the angled light incident on the camera module 2, and improving the imaging quality and imaging stability of the camera module 2.

[0082] In some embodiments, Fig.11 and Fig.12As shown, the aperture limiting member 10 includes a second light shielding member 12, wherein the second light shielding member 12 carries the light-transmitting member 13, and the projection of the second light shielding member 12 along the direction of the first optical axis OA1 surrounds the edge of the light-transmitting member 13 in an annular manner. Specifically, the second light shielding member 12 is fixed to the movable carrier 30, and the second light shielding member 12 includes a first support portion 121, a second support portion 123, and a pair of side blocking portions 125. The first support portion 121 extends in a plane perpendicular to the direction of the first optical axis OA1, the second support portion 123 extends in a plane perpendicular to the direction of the second optical axis OA2, and the side blocking portion 125 extends in a plane parallel to the direction of the first optical axis OA1 and the direction of the second optical axis OA2, so as to laterally connect the first support portion 121 and the second support portion 123. The first support portion 121 faces the light-incoming side of the reflective module 1, so as to carry the light-transmitting member 13, and the light shielding structure 100 is formed on the first support portion 121, so that the reflectivity of the first support portion 121 is less than 5%. It can be understood that the integrated second shading member 12 provides support for the light-transmitting member 13, thereby improving the stability of the internal components of the camera module 2, further improving the stability of the optical path of the incident light entering the reflective element 20, and improving the imaging stability and imaging quality of the camera module 2.

[0083] It can be understood that by carrying the light-transmitting component 13 on the second light-shielding component 12, the internal structural design of the camera module 2 is optimized, the compactness of the structure is increased, and the overall size of the camera module 2 is further reduced, which is beneficial to improving the application performance of the camera module 2 in miniaturized electronic devices and enhancing market competitiveness.

[0084] In some embodiments, Fig.11 and Fig.12 As shown, the side block 125 is relatively arranged along the width direction of the reflection module 1, and the side block 125 is provided with a side inner wall 126, and the side inner wall 126 has an anti-reflection structure, so that the reflectivity of the side inner wall 126 is less than 5%. It can be understood that by symmetrically arranging the side block 125 along the third axis A3 direction, the risk of stray light caused by the reflection phenomenon after the deflected light is incident is further reduced, thereby improving the imaging quality of the camera module 2. Furthermore, since the side inner wall 126 has an anti-reflection structure, the risk of the incident light entering the inner cavity of the camera module 2 provided with the reflective element 20 and causing the light spot phenomenon is reduced. On the other hand, the anti-reflection structure is provided on the side inner wall 126, which is conducive to reducing the contact between the anti-reflection structure and the outside world, further reducing the occurrence of wear and scratches, and extending the service life of the camera module 2.

[0085] In some embodiments, Fig.13As shown, the movable carrier 30 includes a mounting surface 31 and an extension wall 32, the extension wall 32 extends upward from both sides of the mounting surface 31, the mounting surface 31 is fixedly connected to the reflective element 20, the extension wall 32 is provided with a mounting edge 321 and an inner wall surface 322, the mounting edge 321 is obliquely attached to the side stopper 125, the inner wall surface 322 faces the reflective element 20, and the inner wall surface 322 has an anti-reflection structure, so that the reflectivity of the inner wall surface 322 is less than 5%. By fixing the reflective element 20 to the mounting surface 31 of the movable carrier 30, the reflective element 20 is driven to rotate around the first optical axis OA1, or around the second optical axis OA2, or around the third axis A3, which is conducive to further enhancing the installation stability of the reflective element 20 while achieving the anti-shake effect, and improving the stability of the reflected light during transmission. On the one hand, the side stopper 125 of the second light shielding member 12 and the mounting edge 321 of the movable carrier 30 are attached to each other, which is conducive to the installation of the second light shielding member 12 and improves the stability in use. On the other hand, the anti-reflection structure provided on the inner wall surface 322 further compensates for the stray light reflection phenomenon caused by the insufficient coverage area of ​​the side blocking portion 125, thereby improving the image quality and imaging stability.

[0086] In some embodiments, the carrier 51 carries the light-transmitting member 13 and / or the light-shielding structure 100, and the inner surface of the carrier 51 is provided with an anti-reflection structure, so that the reflectivity of the inner surface of the carrier 51 is less than 5%. Among them, the carrier 51 includes a first through hole 122 opened along the first optical axis OA1 and a second through hole 124 opened along the second optical axis OA2. Specifically, the first through hole 122 is used to carry the light-transmitting member 13 and / or the light-shielding structure 100 to provide a stable support. The second through hole 124 receives and emits the light transmitted by the reflective element 20 to the lens module 60 to improve the stability of the light during transmission and further improve the imaging quality of the camera module 2.

[0087] In other words, the supporting member 51 provides a stable support for the light-transmitting member 13 or the light-shielding structure 100, thereby enhancing the stability of the installation of the components inside the camera module 2, further improving the stability of light during transmission, and reducing the risk of stray light, thereby increasing the imaging quality and imaging stability of the camera module 2. In other embodiments, the supporting member 51 may be an outer shell of the camera module 2, and the supporting member 51 is covered on the base 50, further improving the mechanical properties of the camera module 2.

[0088] In some embodiments, the anti-reflection structure can be a black-plated structure and / or an anti-reflection surface 141 with a micro-surface structure, and the reflectivity of the anti-reflection structure is less than 10%. Further preferably, the reflectivity of the anti-reflection structure is less than 5%. It is understood that the black-plated structure usually uses a coating material with strong light absorption ability, which can absorb most of the reflected light and reduce the generation of stray light. On the other hand, the anti-reflection surface 141 with a micro-surface structure can absorb reflected light and enhance the imaging quality and imaging stability of the camera module 2.

[0089] In some embodiments, the anti-reflection structure includes one or more of an arc structure, a sawtooth structure, and a concave structure. Among them, the arc structure is conducive to the uniform scattering of light and reduces the risk of local high reflection; the sawtooth structure directionally attenuates stray light at a specific angle through multiple sharp-angle reflections and quickly dissipates the energy of stray light; the concave structure absorbs energy through multiple reflections of light to achieve deep absorption. By designing a special physical form on the inner wall of the camera module 2 to further optimize the light propagation path, the reflection phenomenon and scattering problem of stray light are significantly reduced. The camera module 2 significantly improves its ability to suppress stray light.

[0090] In some embodiments, reference Fig.14It can be seen that the reflection module 1 further includes a beam expander lens 131, the second support portion 123 faces the light-emitting side of the reflection module 1, and the beam expander lens 131 is installed on the second support portion 123, so that the reflection element 20 is arranged between the light-transmitting member 13 and the beam expander lens 131, wherein the light-transmitting member 13 has a positive focal length for converging light, and the beam expander lens 131 has a negative focal length for expanding light. Among them, the light-transmitting member 13 has at least one convex surface, and the beam expander lens 131 has at least one concave surface. In other words, the light-transmitting member 13 has a positive focal length, which can converge the light, so that the light along the first optical axis OA1 is converged after passing through the light-transmitting member 13, so as to increase the amount of light entering without changing the physical aperture of the camera module 2, that is, it is equivalent to increasing the effective aperture of the camera module 2, thereby improving the imaging quality of the camera module 2 in a low-light environment. Furthermore, the light rays converged by the light-transmitting member 13 remain converged after being reflected by the reflective element 20, so the required size of the beam expander lens 131 is also relatively small, which is conducive to reducing the size of the beam expander lens 131 along the first optical axis OA1, and is conducive to reducing the optical effective diameter of each optical lens in the lens module 60 along the first optical axis OA1, thereby reducing the shoulder height of the camera module 2, which is conducive to meeting the development trend of thinner and lighter electronic devices. As mentioned above, the beam expander lens 131 has a negative optical focal length, which is capable of expanding the light rays, so that the light rays along the second optical axis OA2 are expanded after passing through the beam expander lens 131, thereby increasing the coverage area of ​​the light rays reaching the lens module 60. When the reflective element 20 moves during the optical image stabilization operation, due to the increase in the light coverage area, the movement stroke of the reflective element 20 has a relatively small effect on the position of the light rays on the lens module 60, which is conducive to improving the image stability, so that the picture is more stable during shooting.

[0091] It should be understood that since the light-transmitting member 13 has a focusing effect and the collimating lens 131 has a collimating effect, and since the light-transmitting member 13 increases the amount of light entering, the incident light that has just been focused will generate more stray light after being reflected by the reflective element 20, especially the angled light incident at the edge will be expanded by the collimating lens 131. Unexpected angled light will produce a more complex propagation path, and it will be difficult to avoid the generation of stray light, which will affect the performance of the entire optical system of the reflective module 1 and even the camera module 2. In this application, the aperture-limiting member 10 is used to block the angled light from the light incident point, reduce the entry of unexpected incident light from the source, and further reduce the generation of stray light in the subsequent light propagation path, while simplifying the optical path, improving the imaging quality and imaging stability of the camera module 2.

[0092] It is worth mentioning that by installing the light-transmitting member 13 and the beam-expanding lens 131 on the second light-shielding member 12, the relative position and relative angle between the light-transmitting member 13 and the beam-expanding lens 131 of the reflective element 20 can be kept fixed, and then when the light-transmitting member 13, the reflective element 20 and the beam-expanding lens 131 are driven to rotate together, the light is incident on the reflective element 20 through the light-transmitting member 13, and then reflected to the beam-expanding lens 131 by the reflective element 20. In the process, the propagation path and propagation angle are maintained relatively stable, which not only improves the clarity of the imaging, but also enhances the overall quality of the image. In addition, the relative position and relative angle between the light-transmitting member 13 and the beam-expanding lens 131 of the reflective element 20 remain fixed, which is also conducive to avoiding the setting of additional structures or algorithms to optimize the propagation path and angle of the light, which is conducive to reducing the design difficulty and manufacturing difficulty of the reflective module 1 and the camera module 2, and is conducive to simplifying the driving structure and improving the reliability and stability of the reflective module 1.

[0093] Further, as described above, the light-transmitting member 13 and the beam-expanding lens 131 are carried by the second light-shielding member 12. Since the size of the second light-shielding member 12 is smaller than the base 50, compared with the light-transmitting member 13 and the beam-expanding lens 131 being directly fixed to the base 50, in this embodiment, the light-transmitting member 13 and the beam-expanding lens 131 are installed on the second light-shielding member 12, which is conducive to reducing the size of the light-transmitting member 13 and the beam-expanding lens 131, and reducing the weight of the light-transmitting member 13 and the beam-expanding lens 131. In addition, the gap between the light-transmitting member 13, the reflective element 20 and the beam-expanding lens 131 is smaller, which is conducive to making the structure of the reflective module 1 more compact.

[0094] In some embodiments, Fig.10As shown, the first light shielding member 11 and the second light shielding member 12 are respectively located on both sides of the light-transmitting member 13 along the first optical axis OA1, the upper surface of the first light shielding member 11 is higher than the upper surface of the light-transmitting member 13, the second light shielding member 12 covers the first light shielding member 11 along the projection direction of the first optical axis OA1, and the gap between the second light shielding member 12 and the light-transmitting member 13 is smaller than the gap between the first light shielding member 11 and the light-transmitting member 13. Since the first light shielding member 11, the light-transmitting member 13 and the second light shielding member 12 are sequentially distributed from top to bottom along the first optical axis OA1, wherein the first light shielding member 11 is used as the upper light shielding member, it is beneficial to block the incident of unexpected light, and the second light shielding member 12 with a longer length along the second optical axis OA2 provides a stable support for the light-transmitting member 13 while reducing the stray light phenomenon caused by the incident light incident in the edge area. On the one hand, since the gap between the second light shielding member 12 and the light-transmitting member 13 is small, the shorter the optical interface is, the less controllable the stray light is, and the imaging quality is further improved. On the other hand, as mentioned above, the gap between the second light shielding member 12 and the light transmitting member 13 is smaller than the gap between the first light shielding member 11 and the light transmitting member 13, which is beneficial for the first light shielding member 11 to have a better blocking effect on unexpected light.

[0095] In some embodiments, the light shielding structure 100 may be a portion that is screen-printed on the light-transmitting member 13, and / or a plastic structure that is attached to the edge of the light-transmitting member 13. By arranging the light shielding structure 100 at the periphery of the light-transmitting member 13, it is helpful to reduce the aperture of the light inlet, limit the entry of the deflected light at the edge, and further eliminate the generated stray light.

[0096] In some embodiments, the light-transmitting member 13 is adhered to the second light-shielding member 12, and the bonding thickness between the second light-shielding member 12 and the light-transmitting member 13 is 30 μm to 100 μm. Further preferably, the bonding thickness between the second light-shielding member 12 and the light-transmitting member 13 is 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm. Specifically, black glue can be used to adhere the light-transmitting member 13 to the second light-shielding member 12 to further enhance the blocking effect of unexpected light and reduce the risk of stray light entering the interior of the camera module 2.

[0097] refer to Fig.10 It can be seen that in some embodiments, the reflection module 1 further includes a driving module 40, and the driving module 40 is used to drive the movable carrier 30 to rotate relative to the base 50. The driving module 40 includes a first driving component, a second driving component and a third driving component to respectively drive the movable carrier 30 to rotate around the first optical axis OA1, or around the second optical axis OA2, or around the third axis A3. Each driving component can be implemented as a piezoelectric motor, a voice coil motor, a ball motor, etc.

[0098] Furthermore, since the micro multi-lens structure is used as the optical path turning element in the present application, it is helpful to reduce the shoulder height of the camera module 2, reduce the occupied space and thus improve the thinness of the camera module 2. It is understandable that when the micro multi-lens structure is used, more stray light will be generated on the side of the inner cavity of the camera module 2, and when the driving module 40 drives the movable carrier 30, the movable carrier 30 can drive the reflection module 1 accordingly, so when the light-transmitting member 13 and the beam expander lens 131 also rotate synchronously, the optical path propagation path of the stray light becomes more complicated and uncontrollable, causing the photosensitive module 70 to receive more messy light, reducing the imaging quality of the camera module.

[0099] In other words, through the hole-limiting component 10 provided in the present application, unexpected light is blocked before the incident light enters the camera module 2, thereby reducing the risk of stray light generation from the source, which is beneficial to improving imaging quality and stability.

[0100] In at least one embodiment, the first driving component further includes a driving coil and a driving magnet, the driving coil further includes a first driving coil and a second driving coil, and the driving magnet further includes a first driving magnet and a second driving magnet. The driving magnet is arranged on the inner surface of the base 50 away from the side of the lens module 60, and the driving coil is arranged between the inner surface of the base 50 away from the side of the lens module 60 and the driving magnet. Specifically, the first driving magnet and the first driving coil are arranged relative to each other in a direction parallel to the third axis A3, so that after the first driving coil is energized, the movable carrier 30 can be driven to rotate around the first optical axis OA1, so that the reflective element 20 can rotate around the first optical axis OA1; the second driving magnet and the second driving coil are arranged relative to each other in a direction parallel to the third axis A3, so that after the second driving coil is energized, the movable carrier 30 can be driven to rotate around the second axis, that is, the reflective element 20 can rotate around the second axis.

[0101] In some embodiments, the driving module 40 further includes a driving circuit, which is electrically connected to the first driving coil and the second driving coil and provides current, so that the first driving coil and the first driving magnet cooperate with each other to drive the movable carrier 30 to rotate around the second optical axis OA2, and the second driving coil and the second driving magnet cooperate with each other to drive the movable carrier 30 to rotate around the third axis A3. It is worth mentioning that the driving circuit can be implemented as a conductive metal insert embedded in the base 50, and the driving circuit can also be implemented as a flexible circuit board attached to the base 50.

[0102] In some embodiments, Fig.15 and Fig.16As shown, the rotation axis of the driving module 40 passes through the center axis point of the reflective element 20, and the driving module 40 drives the reflective element 20 and the second light shielding member 12 to rotate synchronously, so that the distance between the center axis point of the reflective element 20 and the lens module 60 is the same as the preset value Ly. Wherein, Ly represents the projection distance between the center axis point of the reflective element 20 and the lens module 60 along the second optical axis OA2 direction in the non-rotated state. Furthermore, by setting the center axis point of the reflective surface 200 in the reflective element 20 as a rotation center of one degree of freedom, it is helpful to ensure the blocking effect of the hole-limiting component 10 on unexpected light, and because the straight-line distance between the center axis point of the reflective element 20 and the lens module 60 remains unchanged, it is helpful to reduce the influence of stray light incident from the edge area on the imaging process, and further enhance the imaging quality and imaging stability of the camera module 2.

[0103] In some embodiments, Fig.17 As shown, the driving module 40 can drive the reflective element 20 to rotate, while the second shading member 12 remains stationary relative to the base 50. Through the split drive, only the reflective element 20 can be rotated, which is beneficial to reduce energy consumption and enhance the performance of the camera module 2.

[0104] In some embodiments, the first light shielding member 11 may be attached around the through hole of the carrier 51 or the upper surface edge of the light-transmitting member 13, wherein the aperture of the light-transmitting member 13 is greater than (tanα)×L3+(tanα)×L1+Lf, and Lf=√2L / 2. Wherein, α represents the field of view angle of the camera module 2 along the first optical axis OA1, wherein the end of the reflective surface 200 close to the light-transmitting member 13 is the first end 21, and the end of the reflective surface 200 away from the light-transmitting member 13 is the second end 22. Further, L represents the length of the reflective surface 200, and L1 represents the effective length of the reflective surface 200, wherein the effective length is the length defined by the imaging viewing angle of the lens module 60, and may also refer to the length of the incident light that can be normally reflected from the reflective surface 200 to the lens module 60. L2 represents the distance between the shading structure 100 and the first end 21 projected along the first optical axis OA1, further represents the minimum distance between the shading structure 100 and the rotation center of the reflective surface 200, in other words, it also represents the minimum optical path length between the incident edge light and the reflective surface 200. Specifically, in the present application, L2 ≥ 150 μm, which is conducive to reducing the collision phenomenon with the lens module 60 when the reflective element 20 is rotated, and enhancing the performance of the camera module 2. L3 represents the distance between the shading structure 100 and the second end 22 projected along the first optical axis OA1, represents the distance between the shading structure 100 and the second end 22 projected along the first optical axis OA1, further represents the maximum distance between the shading structure 100 and the rotation center of the reflective surface 200, in other words, it also represents the maximum optical path length between the incident edge light and the reflective surface 200.

[0105] In some embodiments, the distance between the mid-axis point of the reflective element 20 and the anti-reflective structure along the third axis A3 is L4, and the installation deviation value of the edge of the effective imaging area in the photosensitive module 70 relative to the second optical axis OA2 is Dz. Specifically, the present application satisfies L4≥Lf+2Dz. On the one hand, by ensuring that there is a sufficient distance between the reflective element 20 and the anti-reflective structure, it is helpful to reduce the loss of light during the reflection process and reduce the occurrence of optical distortion, thereby improving the brightness and clarity of the imaging. On the other hand, when there is an installation deviation Dz at the edge of the effective imaging area of ​​the photosensitive module 70 in the direction of the second optical axis OA2, it may cause the light path to deviate from the designed position, and reserving sufficient space is conducive to reducing the assembly precision requirements, reducing production costs and risks. It can be understood that the reserved space is also conducive to reducing the error generated when the reflective element 20 is driven for anti-shake processing, further enhancing the imaging quality and imaging stability of the camera module 2.

[0106] In some embodiments, reference Fig.14 It can be seen that the camera module 2 also includes a lens module 60. The incident light passes through the reflection module 1, and the original light path is turned to reach the lens module 60. Among them, the lens module 60 is provided with cutting edges on the upper and lower surfaces along the first optical axis OA1. This design can effectively reduce the size of the lens module 60, thereby reducing the height and volume of the entire camera module 2, and further enhancing the portability of the camera module 2 in electronic devices.

[0107] In some embodiments, the lens module 60 includes a plurality of lenses, and the lens module 60 is used to image light on an imaging surface of the photosensitive module 70. Specifically, the lens module 60 includes a first lens group and a second lens group, and the first lens group and the second lens group are sequentially arranged along the second optical axis OA2.

[0108] In a specific embodiment, the first lens group is a fixed lens group, and the second lens group is a focusing lens group. That is, the first lens group is fixed to the base 50, and the second lens group is carried on a carrier. The focusing drive component can drive the carrier to carry the second lens group to move along the second optical axis OA2, and then the optical focusing function of the camera module 2 can be realized by adjusting the relative position of the first lens group and the second lens group. In addition, the relative position of the second lens group and the imaging surface of the photosensitive module 70 can also be adjusted to switch the imaging mode of the camera module 2.

[0109] It should be understood that the lens module 60 may also include a third lens group and / or a fourth lens group, and the third lens group and / or the fourth lens group may move along the second optical axis OA2 to achieve an optical zoom function, and the present application does not impose any specific restrictions on this.

[0110] In some embodiments, the photosensitive module 70 includes a chip circuit board, a photosensitive chip, and a plurality of electronic components. Specifically, the photosensitive chip and the plurality of electronic components are electrically connected to the chip circuit board, and the photosensitive chip is used to receive the external light collected by the reflection module 1 for imaging, and is electrically connected to an external electronic device through the chip circuit board. It should be understood that the plurality of electronic components include but are not limited to passive electronic devices such as resistors and capacitors, and driver chips, storage chips, etc.

[0111] According to another aspect of the present application, a periscope camera module 2 includes the above-mentioned reflection module 1; the lens module is held on the light reflection path of the reflection module; the photosensitive module receives the light emitted by the lens module for imaging; the driving module is used to drive the movable carrier to rotate; the base has a receiving cavity, and the reflection module and the lens module are arranged in the receiving cavity. By providing the reflection module 1, the incident of unexpected deflected light is reduced from the light incident side, and the imaging stability and imaging quality of the camera module 2 are enhanced. On the one hand, the movable carrier 30 is driven by the driving module 40 to drive the movement of the reflection element 20 and / or the hole-limiting member 10, and the anti-shake processing is beneficial to improving the imaging quality and stability of the image while better adapting to the application environment with various shading requirements. On the other hand, by folding the optical path, it is beneficial to reduce the occupied space of the camera module 2, realize the thin and light design requirements of the camera module 2, and further enhance the market competitiveness.

[0112] In some embodiments, Fig.18 As shown, the shading structure 100 can also be set as a sheet component along the direction parallel to the second optical axis OA2, and attached to the light entrance of the carrier 51 in the camera module 2. Among them, since the shading structure 100 arranged at the entrance blocks the unexpected angled light incidence, the influence of stray light on imaging is further reduced. It can be understood that since the shading structure 100 is arranged on the carrier 51 of the camera module 2, it is easy to disassemble and install, and the production and assembly efficiency is better enhanced. And it is easy to adjust the position, so that the camera module 2 is adapted to different use environments, thereby enhancing the applicability of the camera module 2.

[0113] Furthermore, by providing a shading structure 100 on the carrier 51, it is possible to avoid the occurrence of mirror reflection or scattering when a strong external light source, such as sunlight or lamplight, directly shines on the edge of the lens or the inner wall of the inner chamber of the camera module 2, thereby further reducing the risk of forming light spots or ghost images.

[0114] In some embodiments, the light shielding structure 100, which is a sheet-like component in a direction parallel to the second optical axis OA2, can also be attached to the inner peripheral wall of the light entrance of the camera module 2 carrier 51. Among them, since the aperture limiter is arranged inside the camera module 2, the height of the camera module 2 as a whole in the direction of the first optical axis OA1 is preferably reduced, so that the light shielding structure 100 is relatively stably installed inside the camera module 2, further increasing the stability of imaging. It can be understood that the aperture limiter attached to the carrier 51 has the advantage of being easy to assemble, facilitating assembly, and optimizing the production process.

[0115] In some embodiments, Fig.19 As shown, the edge of the light inlet of the carrier 51 of the camera module 2 can also be provided with an assembly groove to assemble the light shielding structure 100 arranged on the outer peripheral wall. The provided assembly groove further improves the stability of the light shielding structure 100 after installation. Therefore, the incident light can enter the camera module 2 more stably to enhance the stability of imaging.

[0116] In some embodiments, the length of the light entrance of the camera module 2 carrier 51 and the light shielding structure 100 along the second optical axis OA2 can also be extended, which is beneficial to reduce the total weight of the camera module 2, thereby meeting the requirements for thinness of the camera module 2. It can be understood that the light shielding structure 100 attached to the carrier 51 is easy to adjust and assemble, which can improve the production and assembly efficiency.

[0117] In some embodiments, Figure 1 As shown, the projection area of ​​the reflective module 1 on the camera module 2 carrier 51 along the second optical axis OA2 can also be raised to form a stepped structure, which further reduces the space occupied by the camera module 2 and is beneficial to enhancing the portability and lightness of the camera module 2.

[0118] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A reflection module, comprising a reflection element and a movable carrier, wherein the reflection element is capable of reflecting light propagating along a first optical axis to propagate along a second optical axis; the movable carrier carries the reflection element; characterized in that: It further includes a hole-limiting component, which includes a light-shielding structure, a light-transmitting component and a supporting component, the supporting component is provided with a through hole, the light-transmitting component and the through hole of the supporting component are coaxially arranged along the first optical axis, the light-transmitting component and the reflecting element are relatively arranged along the first optical axis direction, the light-transmitting component and the light-shielding structure are located on the light-incoming side of the reflecting module, and the projection of the light-shielding structure along the first optical axis direction annularly surrounds the projection edge of the light-transmitting component along the first optical axis direction, so as to limit the amount of light entering the edge of the light-transmitting component.

2. The reflection module according to claim 1, characterized in that: The projection of the shading structure along the first optical axis direction at least partially covers the edge of the light-transmitting member; and / or the light-transmitting member is arranged edge-to-edge on the inner side of the shading structure along the second optical axis direction; wherein the reflectivity of the shading structure is less than 5%.

3. The reflection module according to claim 2, characterized in that: The shading structure includes a pair of long side segments and a pair of short side segments, the long side segments and the short side segments are integrally connected along the edge of the light-transmitting component, the short side segments are relatively arranged along the width direction of the reflection module, and the long side segments are relatively arranged along the second optical axis, and the width direction of the reflection module is perpendicular to the first optical axis and the second optical axis.

4. The reflection module according to claim 3, characterized in that: The ring width of the short side segment is greater than the ring width of the long side segment.

5. The reflection module according to claim 3, characterized in that: The long side segment includes a first long side segment and a second long side segment, the first long side segment is far away from the lens module along the second optical axis direction, the second long side segment is close to the lens module along the second optical axis direction, and the ring width of the first long side segment is greater than the ring width of the second long side segment.

6. The reflection module according to claim 5, characterized in that: The first long side segment is a straight segment, and the second long side segment extends in an arc shape toward the lens module relative to the first long side segment, so that the distance between the first long side segment and the movable field of view is smaller than the distance between the second long side segment and the movable field of view.

7. The reflection module according to claim 1, characterized in that: The carrier carries the light-transmitting member and / or the light-shielding structure, and an anti-reflection structure is provided on the inner surface of the carrier, so that the reflectivity of the inner surface of the carrier is less than 5%.

8. The reflection module according to claim 1, characterized in that: It further comprises a tip portion which is at least partially annularly arranged at the inner boundary of the light-shielding structure, wherein the tip portion faces the central axis point of the plane of the light-transmitting member along the second optical axis direction.

9. The reflection module according to any one of claims 1 to 8, characterized in that: The aperture limiting member further comprises a first light shielding member and / or a second light shielding member, the light shielding structure is formed on the first light shielding member, the first light shielding member is located above the light-transmitting member, and the projection of the first light shielding member along the first optical axis direction at least partially covers the edge of the light-transmitting member; And / or the shading structure is formed on the second shading member, the second shading member carries the light-transmitting member, and the projection of the second shading member along the first optical axis direction annularly surrounds the edge of the light-transmitting member.

10. The reflection module according to claim 9, characterized in that: The reflectivity of the first light shielding member is less than 5%, and the ratio of the height h1 between the first light shielding member and the upper surface of the light transmitting member to the thickness h2 of the light transmitting member is: 1 / 3≤h1:h2≤3.

11. The reflection module according to claim 10, characterized in that: The second light-shielding member is fixedly connected to the movable carrier, and the second light-shielding member includes a first supporting portion, a second supporting portion and a pair of side blocking portions. The first supporting portion extends in a plane perpendicular to the direction of the first optical axis, the second supporting portion extends in a plane perpendicular to the direction of the second optical axis, and the side blocking portions extend in a plane parallel to the direction of the first optical axis and the direction of the second optical axis, so as to laterally connect the first supporting portion and the second supporting portion. The first supporting portion faces the light-incoming side of the reflection module, so as to support the light-transmitting member. The light-shielding structure is formed on the first supporting portion, so that the reflectivity of the first supporting portion is less than 5%.

12. The reflection module according to claim 11, characterized in that: The side blocking portions are arranged opposite to each other along the width direction of the reflection module. The side blocking portions are provided with side inner walls. The side inner walls have an anti-reflection structure, so that the reflectivity of the side inner walls is less than 5%.

13. The reflection module according to claim 11, characterized in that: The movable carrier includes a mounting surface and an extension wall, wherein the extension wall extends upward from both sides of the mounting surface, and the mounting surface is fixedly connected to the reflective element. The extension wall is provided with a mounting edge and an inner wall surface, wherein the mounting edge is obliquely attached to the side stopper, and the inner wall surface faces the reflective element. The inner wall surface has an anti-reflection structure, so that the reflectivity of the inner wall surface is less than 5%.

14. The reflection module according to claim 11, characterized in that: It further includes a collimator lens, wherein the second supporting portion faces the light emitting side of the reflective module, and the collimator lens is installed on the second supporting portion so that the reflective element is arranged between the light-transmitting member and the collimator lens, wherein the light-transmitting member has a positive optical focal length for converging light, and the collimator lens has a negative optical focal length for expanding light.

15. The reflection module according to claim 11, characterized in that: The first light shading member and the second light shading member are respectively located on both sides of the light transmitting member along the direction of the first optical axis, the upper surface of the first light shading member is higher than the upper surface of the light transmitting member, the second light shading member covers the first light shading member along the projection direction of the first optical axis, and the gap between the second light shading member and the light transmitting member is smaller than the gap between the first light shading member and the light transmitting member, wherein the light transmitting member is adhered to the second light shading member, and the bonding thickness between the second light shading member and the light transmitting member is 30μm-100μm.

16. The reflection module according to claim 15, characterized in that: The first light-shielding member is provided with a first long side segment and a second long side segment, the first long side segment and the second long side segment are arranged opposite to each other along the second optical axis direction, the first long side segment is far away from the lens module, the second long side segment is close to the lens module, and the distance between the first long side segment and the central axis of the reflecting element is smaller than the distance between the second long side segment and the central axis of the reflecting element.

17. The reflection module according to claim 9, characterized in that: It further includes a driving module, the rotation axis of which passes through the center axis point of the reflective element, and the driving module drives the reflective element and the second shading member to rotate synchronously, so that the distance between the center axis point of the reflective element and the lens module is the same as the preset value Ly.

18. The reflection module according to claim 9, characterized in that: The first shading member can be attached around the through hole of the supporting member or the edge of the upper surface of the light-transmitting member, wherein the aperture of the light-transmitting member is greater than (tanα)×L3+(tanα)×L1+Lf, Lf=√2L / 2, α is the field of view angle of the camera module along the first optical axis, L is the total length of the reflecting surface in the reflecting element, L1 is the effective length of the reflecting surface, and L3 is the distance between the shading member and the end of the reflecting surface away from the light-transmitting member projected along the first optical axis.

19. A periscope camera module, characterized in that: include: The reflection module as claimed in any one of claims 1 to 18; a lens module, wherein the lens module is held on a light reflection path of the reflection module; as well as A photosensitive module, which receives the light emitted by the lens module to perform imaging; A driving module, the driving module is used to drive the movable carrier to rotate; The base has a receiving cavity, and the reflection module and the lens module are arranged in the receiving cavity.

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