A reflection module and a periscope camera module

Abstract

The present application discloses a reflection module and a periscope camera module thereof, belonging to the field of camera modules. A reflection module includes a reflection element that reflects light propagating along a first optical axis to propagate along a second optical axis; a movable carrier that bears the reflection element; a hole-limiting member including a light-shielding structure, a light-transmitting member, and a bearing member. The bearing member is provided with a through hole, the through hole of the light-transmitting member and the bearing member are coaxially arranged along the first optical axis, the light-transmitting member and the reflection element are arranged opposite to each other along the first optical axis direction, the light-transmitting member and the light-shielding structure are located on the light-incident 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 member along the first optical axis direction, so as to limit the light-incident amount at the edge of the light-transmitting member. The reflection module and the periscope camera module thereof provided by the present application have the advantages of good imaging quality and reduced generation of stray light.

Description

Technical Field

[0001] The present application relates to a periscope camera module, and more particularly 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 thinner and lighter smartphones, periscope camera modules are applied to mobile phone camera technology, making long-distance zoom possible. Existing periscope camera modules usually use prisms or mirrors to achieve light reflection. The mirror reflects light through a reflective surface and does not require total internal reflection from a high-density medium to a low-density medium like a prism. Although the reflection efficiency of the mirror may be 2% - 5% lower than that of total internal reflection of the prism, since the mirror is thinner than the prism, theoretically, a periscope camera module with a smaller size can be achieved.

[0003] However, since stray light is easily generated when incident light propagates in the camera module, on the other hand, the propagation path of the light deviates greatly from the expected path, thereby reducing the imaging quality of the camera module. Summary of the Invention

[0004] An object of the present application is to provide a reflection module, which reduces the incidence of light with a deflection angle, reduces the generation of stray light, and further improves the imaging quality of the camera module.

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

[0006] To achieve the above object, the technical solution adopted in the present application is a reflection module, which includes a reflection element and a movable carrier. The reflection element can reflect the light propagating along the first optical axis to propagate along the second optical axis. The movable carrier carries the reflection element. It is characterized in that it further includes a hole-limiting member, which includes a light-shielding structure, a light-transmitting member, and a carrier member. The carrier member is provided with a through hole. The light-transmitting member and the through hole of the carrier member are coaxially arranged along the first optical axis. The light-transmitting member and the reflection element are relatively arranged along the first optical axis direction. The light-transmitting member and the light-shielding structure are located on the light-incident side of the reflection module. The projection of the light-shielding structure along the first optical axis direction annularly surrounds the projection edge of the light-transmitting member along the first optical axis direction, so as to limit the light incident amount at the edge of the light-transmitting member.

[0007] As a preference, the projection of the light-shielding 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 edge-to-edge arranged on the inner side of the light-shielding structure along the second optical axis direction; wherein, the reflectivity of the light-shielding structure is less than 5%.

[0008] As a preference, the light-shielding 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 joined along the edge of the light-transmitting member. Each of the short side segments is oppositely arranged along the width direction of the reflection module, and each of the long side segments is oppositely arranged along the second optical axis. The width direction of the reflection module is perpendicular to the first optical axis and the second optical axis.

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

[0010] As a preference, the long side segment includes a first long side segment and a second long side segment. The first long side segment is away from the lens module along the second optical axis direction, and the second long side segment is close to the lens module along the second optical axis direction. The annular width of the first long side segment is greater than that of the second long side segment.

[0011] As a preference, the first long side segment is a straight segment, and the second long side segment extends arcuately towards the lens module relative to the first long side segment, such that the distance between the first long side segment and the movable viewing area is less than the distance between the second long side segment and the movable viewing area.

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

[0013] As a preference, the reflection module further includes a tip that is at least partially annularly arranged on the inner boundary of the light-shielding structure. Wherein, the tip faces the mid-axis point of the plane of the light-transmitting member along the second optical axis direction.

[0014] As a preference, 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 carries 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] As a preference, 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] As a preference, the second light-shielding member is fixedly connected to the movable carrier. The second light-shielding member includes a first support portion, a second support portion, and a pair of side shielding portions. The first support portion extends in a plane perpendicular to the direction of the first optical axis. The second support portion extends in a plane perpendicular to the direction of the second optical axis. The side shielding portions extend in a plane parallel to the directions of the first optical axis and the second optical axis to laterally connect the first support portion and the second support portion. The first support portion faces the light incident side of the reflection module and is capable of carrying the light-transmitting member. The light-shielding structure is formed on the first support portion such that the reflectivity of the first support portion is less than 5%.

[0017] As a preference, the side shielding portions are oppositely arranged along the width direction of the reflection module. The side shielding portions are provided with side inner walls which have anti-reflection structures such that the reflectivity of the side inner walls is less than 5%.

[0018] As a preference, the movable carrier includes a mounting surface and extending walls. The extending walls extend upward from both sides of the mounting surface. The mounting surface is capable of fixedly connecting the reflection element. The extending walls are provided with mounting edges and inner wall surfaces. The mounting edges are inclined and attached to the side shielding portions. The inner wall surfaces face the reflection element and have anti-reflection structures such that the reflectivity of the inner wall surfaces is less than 5%.

[0019] As a preference, the reflection module further includes a beam expanding lens. The second support portion faces the light exiting side of the reflection module. The beam expanding lens is mounted on the second support portion such that the reflection element is arranged between the light-transmitting member and the beam expanding lens. Among them, the light-transmitting member has a positive optical power for converging light, and the beam expanding lens has a negative optical power for expanding light.

[0020] As a preference, the first light-shielding member and the second light-shielding 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-shielding member is higher than the upper surface of the light-transmitting member. The second light-shielding member covers the first light-shielding member along the projection direction of the first optical axis. The gap between the second light-shielding member and the light-transmitting member is smaller than the gap between the first light-shielding member and the light-transmitting member. Among them, the light-transmitting member is adhered to the second light-shielding member, and the bonding thickness between the second light-shielding member and the light-transmitting member is 30μm - 100μm.

[0021] As a preference, 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 oppositely arranged along the direction of the second optical axis. The first long side segment is away from the lens module, and the second long side segment is close to the lens module. The distance between the first long side segment and the central axis of the reflection element is smaller than the distance between the second long side segment and the central axis of the reflection element.

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

[0023] As a preference, the first light-shielding member can be attached around the through hole of the carrier or the upper surface edge of the light-transmitting member, wherein the aperture of the light-transmitting member > (tanα)×L3 + (tanα)×L1 + Lf, Lf = √2L / 2, α is the field of view angle of the camera module along the first optical axis direction, L is the total length of the reflection surface of the reflection element, L1 is the effective length of the reflection surface, and L3 is the distance of the projection along the first optical axis direction between the light-shielding member and the end of the reflection surface away from the light-transmitting member.

[0024] To achieve one of the purposes of the present application, the technical solution adopted in the present application is a camera module, including any one of the above-mentioned reflection modules; a lens module, the lens module is held 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; a base, the base has a receiving cavity, and the reflection module and the lens module are arranged in the receiving cavity. Description of the Drawings

[0025] Figure 1 Structural schematic diagrams of some exemplary periscope camera modules in the present application.

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

[0027] Figure 3A Structural schematic diagrams of some aperture-limiting members in the present application.

[0028] Figure 3B Structural schematic diagrams of some aperture-limiting members in the present application.

[0029] Figure 3C Structural schematic diagrams of some aperture-limiting members in the present application.

[0030] Figure 3D Structural schematic diagrams of some aperture-limiting members in the present application.

[0031] Figure 3E Structural schematic diagrams of some aperture-limiting members in the present application.

[0032] Figure 3F Structural schematic diagrams of some other aperture-limiting members in the present application.

[0033] Figure 4A These are the structural schematic diagrams of some hole-limiting components in the present application.

[0034] Figure 4B These are the structural schematic diagrams of some other hole-limiting components in the present application.

[0035] Figure 5 These are the structural schematic diagrams of some more hole-limiting components in the present application.

[0036] Figure 6 These are the structural schematic diagrams of some light-shielding components in the present application.

[0037] Figure 7 These are the structural schematic diagrams of some more light-shielding components in the present application.

[0038] Figure 8 These are the cross-sectional views of some periscope camera modules in the present application.

[0039] Figure 9 These are the cross-sectional views of some hole-limiting components in the present application.

[0040] Figure 10 These are the cross-sectional views of some more periscope camera modules in the present application.

[0041] Figure 11 These are the structural schematic diagrams of some second light-shielding components in the present application.

[0042] Figure 12 These are the structural schematic diagrams of some more second light-shielding components in the present application.

[0043] Figure 13 These are the exploded views of some periscope camera modules in the present application.

[0044] Figure 14 These are the cross-sectional views of some periscope camera modules in the present application.

[0045] Figure 15 These are the cross-sectional views of some more periscope camera modules in the present application.

[0046] Figure 16 These are the cross-sectional views of some more periscope camera modules in the present application.

[0047] Figure 17 These are the cross-sectional views of some more periscope camera modules in the present application.

[0048] Figure 18 These are the three-dimensional views of some periscope camera modules in the present application.

[0049] Figure 19 These are the three-dimensional views of some more periscope camera modules in the present application.

[0050] In the figure: 1. Reflection module; 2. Camera module; 10. Hole-limiting member; 100. Light-shielding structure; 11. First light-shielding 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 light-shielding member; 121. First support portion; 122. First through hole; 123. Second support portion; 124. Second through hole; 125. Side blocking portion; 126. Side inner wall; 13. Translucent member; 131. Beam-expanding lens; 141. Anti-reflection surface; 15. Movable viewing area; 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. Carrier; 60. Lens module; 70. Photosensitive module. Detailed implementation manners

[0051] Next, in combination with the detailed implementation manners, the present application will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0052] In the description of the present application, it should be noted that for orientation terms, such as terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and position relationships indicated are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope 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 do not necessarily need to describe a specific order or sequence.

[0054] The terms "comprise" and "have" and any variations thereof in the description and claims of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that comprises a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

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

[0056] The reflection element 20 is used to reflect the light propagating along the first optical axis OA1 to propagate along the second optical axis OA2. By the reflection element 20, the optical path can be folded, which can preferably 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 the thin and light design for application in electronic devices.

[0057] The movable carrier 30 is used to carry the reflection element 20. By driving the reflection element 20 through the movable carrier 30, relative movement or simultaneous movement with the light-limiting member 10 is realized. While adapting to various application environments, the generation of stray light is further reduced, and the imaging quality of the camera module 2 is enhanced.

[0058] The light-limiting member 10 further includes a light-shielding structure 100, a light-transmitting member 13, and a carrier member 51. The carrier member 51 is provided with a through hole. The light-transmitting member 13 and the through hole of the carrier member 51 are coaxially arranged along the first optical axis OA1. The light-transmitting member 13 and the reflection element 20 are relatively arranged along the first optical axis OA1. The light-transmitting member 13 and the light-shielding structure 100 are located on the light incident side of the reflection module 1. 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, so as to limit the light incident amount at the edge of the light-transmitting member 13. By the light-limiting member 10 provided in the present application, it is beneficial to reduce the incident amount of the deflected light, reduce the generation of stray light, and further enhance the imaging quality of the camera module 2.

[0059] Further, due to the cavity structure between the reflection module 1 and the base 50 in the camera module, stray light is likely to be 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 can be understood that when the incident angle of the deflected light is between 20° and 50°, the deflected light is more likely to generate a reflection phenomenon in the cavity of the camera module 2 provided with the reflection element 20. And when the reflection element 20 is installed on the movable carrier 30 for the anti-shake function, due to the change in the position of the reflection element 20, the risk of generating stray light between the reflected light in the cavity and the reflection element 20 increases. Especially when using the anti-shake function to photograph point light sources such as street lights at night, the probability that the reflected light is received by the photosensitive module 70 is greatly increased, increasing the risk of generating stray light and further reducing the imaging quality of the camera module 2.

[0060] Specifically, when a prism is used as the optical path turning element in the reflection element 20, its surface is usually polished and may be coated with an anti-reflection coating to reduce the reflection phenomenon generated by light on the surface. On the one hand, the prism structure is relatively simple, and the number of interfaces that the light passes through during propagation is small, so the risk of stray light generation is small. On the other hand, when a micro multi-lens structure is used as the optical path turning element, it is beneficial to reduce the shoulder height of the imaging module 2 and reduce the occupied space of the imaging module 2. However, since each lens has two surfaces, light will generate reflection phenomena 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 stacked, 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 requirements for the imaging module 2 are higher. Therefore, a small installation deviation may cause more internal light reflection or scattering phenomena, thereby reducing the imaging quality of the imaging module 2. Therefore, reducing the incidence of deflected light can further reduce the risk of stray light appearance.

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

[0062] Among them, the previously mentioned "the projection of the light shielding structure 100 along the first optical axis OA1 direction annularly surrounds the projection edge of the light transmissive member 13 along the first optical axis OA1 direction" can be understood as that the light shielding structure 100 is arranged on the upper side and / or the lower side of the light transmissive member 13 along the first optical axis OA1 direction, and at least a part of the projection of the light shielding structure 100 along the first optical axis OA1 direction can surround the projection edge of the light transmissive member 13 along the first optical axis OA1 direction. Further, as previously mentioned "annularly surrounds", it can be that the light shielding structure 100 covers the edge of the light transmissive member 13 along the first optical axis OA1 direction, or the light shielding structure 100 surrounds the edge of the light transmissive member 13 along the second optical axis OA2 direction. The light shielding structure 100 can be arranged on the upper side, the lower side or the periphery in the same horizontal direction of the light transmissive member 13 along the first optical axis OA1 direction.

[0063] Specifically, as Figure 3AAs shown, the projection edge of the light-shielding structure 100 along the first optical axis OA1 can coincide with the projection edge of the light-transmitting member 13 along the first optical axis OA1, further reducing the possibility of stray light incidence. In another specific embodiment, as Figure 6 and Figure 7 shown, there may be a slight gap between the projection edge of the light-shielding structure 100 along the first optical axis OA1 and the projection edge of the light-transmitting member 13 along the first optical axis OA1, so as to reduce the blocking effect of the light-shielding structure 100 on the light-transmitting member 13 and facilitate the transmission of incident light.

[0064] In at least one specific embodiment, as Figure 3B shown, the light-shielding structure 100 can be disposed 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 the projection of at least a part of the light-shielding 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, as Figure 3C and Figure 3D shown, the light-shielding structure 100 and the light-transmitting member 13 are arranged side by side along the second optical axis OA2 on the inner side of the light-shielding structure 100. Specifically, the light-shielding structure 100 can be disposed 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 usage environments with different light-shielding degree requirements. Among them, the reflectivity of the light-shielding structure 100 is less than 5% to reduce the risk of reflection of incident light.

[0066] In at least one embodiment, as Figure 3E shown, at least a part of the projection of the light-shielding structure 100 along the first optical axis OA1 falls inside the projection of the light-transmitting member 13 along the first optical axis OA1, further reducing the possibility of stray light incidence by enhancing the connection performance between the light-shielding structure 100 and the light-transmitting member 13 in the first optical axis OA1 direction.

[0067] In at least one embodiment, as Figure 3F shown, the projection boundaries of at least a part 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 produce a contact-type enclosure. The adjacent light-shielding structure 100 and light-transmitting member 13 have a good blocking effect on non-expected deflected angle light, which is beneficial to improving the imaging quality of the camera module 2 and further enhancing the market competitiveness.

[0068] In some embodiments, as Figure 4AAs shown, the light-shielding 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. Each of the short side segments 112 is oppositely arranged along the width direction of the reflection module 1, and each of the long side segments 111 is oppositely arranged along the second optical axis OA2, which is beneficial to reducing the shielding phenomenon caused by the light-shielding structure 100 to the light-transmitting member 13, facilitating the normal incidence of light, and further enabling the imaging module 2 to image normally.

[0069] In some embodiments, referring to Figure 4B As shown, the long side segment 111 includes an inner long side segment 115 and an outer long side segment 116. The inner long side segment 115 is close to the light incident position along the direction of the second optical axis OA2, and the outer long side segment 116 is far from the light incident position along the direction of the second optical axis OA2. The short side segment 112 includes an inner arc segment 117 and an outer arc segment 118. The inner arc segment 117 is close to the light incident position along the direction of the third axis A3, and the outer arc segment 118 is far from the light incident position along the direction of 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. Among them, the distance between the inner long side segments 115 is t1, and the distance between the inner arc segments 117 is t2. Further, the ratio of t2 / t1 satisfies: 1 < t2 / t1 ≤ 1.5. It can be understood that when the length of the long side of the photosensitive chip arranged along the first optical axis OA1 is greater than the length of the short side arranged along the third axis A3, the field of view angle in the long side direction will be significantly larger than the field of view angle in the short side direction at this time. When the field of view angle in the long side is larger, it will increase the risk of stray light incidence, thereby reducing the imaging quality of the imaging module 2. In other words, since the arc-shaped track structure formed by the long side segments 111 and the short side segments 112 at this time can reduce the phenomenon of inconsistent field of view angles in the long side and short side directions caused by the inconsistent lengths of the long and short sides of the photosensitive chip, the imaging quality is further enhanced.

[0070] In some embodiments, as Figure 4A 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 arranged parallel to the third axis A3 is the long side, and the side segment arranged parallel to the first optical axis OA1 is the short side. Since when the field of view angle in the long side direction of the photosensitive chip is larger, it will increase the risk of stray light incidence, thereby reducing the imaging quality of the imaging module 2. Therefore, by increasing the ring width of the short side segment 112, the width of the light-shielding structure 100 in the third axis A3 direction is increased, and the width difference between the long side segment 111 and the short side segment 112 of the light-shielding structure 100 in the second optical axis OA2 direction and the third axis A3 direction is reduced, further eliminating the risk of stray light incidence in the long side direction of the photosensitive chip, thereby improving the imaging quality of the imaging module 2.

[0071] In some embodiments, as 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 extends away from the lens module 60 along the second optical axis OA2, and the second long side segment 114 extends closer to the lens module 60 along the second optical axis OA2. 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 off-axis 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 imaging module 2.

[0072] Reference 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 arcuately towards the lens module 60 relative to the first long side segment 113, such that the distance between the first long side segment 113 and the movable viewing area 15 is less than the distance between the second long side segment 114 and the movable viewing area 15. Specifically, in the direction of the first optical axis OA1, the reflection module 1 includes a movable viewing area 15, and the movable viewing area 15 is a hypothetical area in the shape of a racetrack inside the light transmissive member 13. Moreover, the outer boundary shape of the movable viewing area 15 can be adapted to the boundary shape of the light transmissive member 13, thereby avoiding the light transmissive member 13 from blocking this movable viewing area 15, which is beneficial to the normal imaging process of the imaging module 2. In other words, since the incident light on the side closer to the lens module 60 is less likely to be reflected by the reflection element 20, by setting the second long side segment 114 as an arc, it is beneficial to adjust the position of the movable viewing area 15 relative to the light transmissive member 13, thereby enabling the active calibration process of the reflection element 20 relative to the light transmissive member 13, and facilitating the adjustment of the reflection element 20 towards the side closer to the lens module 60. Further, the distance between the first long side segment 113 of the light shielding structure 100 and the movable viewing area 15 along the second optical axis OA2 is set as a1, and the distance between the second long side segment 114 of the light shielding structure 100 and the movable viewing area 15 along the second optical axis OA2 is set as b1. When a1 < b1, it is beneficial to enhance the positional tightness between the edge of the light transmissive structure on the side away from the lens module 60 and the movable viewing area 15, so as to enhance the light shielding performance on the side away from the lens module 60. While reducing the risk of generating stray light, it is possible to calibrate and adjust the position of the movable viewing area 15 relative to the light shielding structure 100, further enhancing the imaging quality of the imaging module 2.

[0073] In some embodiments, such as Figure 6As shown, the reflection module 1 further includes a tip 16 that is at least partially annularly disposed at the inner boundary of the light-shielding structure 100, wherein the tip 16 faces the central axis point of the plane of the light-transmitting member 13 along the second optical axis OA2 direction. Since the tip 16 has a relatively small blocking effect on the incident light, even when the tip 16 extends to be able to fit with the boundary of the movable viewing area 15, the viewing angle and the light transmittance of the imaging module 2 will not be significantly affected. It can be understood that the provided tip 16 can block the incident of unexpected light and reduce the generation of stray light. Therefore, the tip 16 provided inside the light-shielding structure 100 can reduce the risk of stray light generation without affecting the viewing angle of the imaging module 2, thereby improving the imaging quality of the imaging module 2.

[0074] In some embodiments, as Figure 7 shown, the tip 16 can also be disposed 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 the incident of unexpected light and reduce the generation of stray light. Specifically, since the tip 16 is only disposed on the side away from the lens module 60, it is beneficial to improve the situation where the incident light on the side close to the lens module 60 is difficult to be reflected by the reflecting element 20. It can be understood that the movable viewing 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, so as to reduce the possibility of stray light entering the reflection module, and further enhance the imaging quality of the imaging module 2 while having a high resolution.

[0075] In some embodiments, as Figure 2As shown, the aperture limiting member 10 further includes a first light-shielding member 11 and a second light-shielding member 12. The light-shielding structure 100 is formed on the first light-shielding member 11. The first light-shielding member 11 is disposed above the light-transmitting member 13 along the direction of the first optical axis OA1. Among them, the projection of the first light-shielding member 11 along the direction of the first optical axis OA1 at least partially covers the edge of the light-transmitting member 13; and the light-shielding structure 100 is formed on the second light-shielding member 12. The second light-shielding member 12 bears the light-transmitting member 13. The projection of the second light-shielding member 12 along the direction of 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 lowered. Further, 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 phenomenon of stray light caused by the incidence of deflected light can be reduced. On the other hand, since the second light-shielding member 12 can also be used 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 imaging module 2. On the other hand, by the annularly arranged light-shielding structure 100, it is beneficial to protect the edge of the light-transmitting member 13 from collision or scratching, and play a buffering role when receiving external pressure, further reducing the deformation or optical axis deviation phenomenon of the light-transmitting member 13 caused by mechanical stress, prolonging the service life of the imaging module 2, and enhancing the mechanical performance of the imaging module 2.

[0076] In some embodiments, the aperture limiting member 10 includes a first light-shielding member 11. 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. The projection of the first light-shielding member 11 along the direction of 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 direction of the first optical axis OA1, the deflected light is blocked before the incident light enters the reflection element 20, further reducing the risk of generating stray light and improving the imaging quality and imaging stability of the imaging module 2.

[0077] In some embodiments, as Figure 8 and Figure 9 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. Among them, when the incident light angle is fixed, the larger the value of h1, the smaller the area range of the incident light that can enter the light-transmitting member 13 after being blocked by the light-shielding structure 100, and when the value of h1 is smaller, the larger the area range of the incident light that can enter the light-transmitting member 13 after being blocked by the light-shielding structure 100.

[0078] It can be understood that, as Figure 10As shown, the incident light that can enter the reflection element 20 after passing through the light-shielding structure 100 on one side and then through the light-shielding structure 100 on the other side is defined as the marginal light, and the incident angle of the marginal light is β. When the included angle value between the marginal light and the light of the imaging view 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 light-shielding structure 100 along the first optical axis OA1 is too large, the occupied space of the camera module 2 is further increased. Therefore, in the present application, appropriate values of h1 and h2 are selected to reduce the incidence of off-axis light and at the same time reduce the height of the camera module 2 along the first optical axis OA1, which is beneficial to meeting the requirements of the thin and light design of the camera module 2. On the other hand, it is beneficial to improve the risk of increasing aberrations such as field curvature and coma when the β value is large. By designing the height of the light-shielding structure 100, the incident angle of the incident light is further restricted, and the refraction deviation phenomenon of the marginal light is further reduced, thereby improving the sharpness and consistency of the edge of the imaging picture.

[0079] In other words, since the light-shielding structure 100 has a certain height, it is beneficial to block external particulate matter from entering the camera module 2 and improve the phenomenon that in devices with more outdoor applications, such as mobile phones, etc., due to dust or liquid invading the inside of the camera module 2 and adhering to the surface of the light-transmitting member 13, 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 oppositely arranged along the second optical axis OA2. The first long side segment 113 is far from the lens module 60, and the second long side segment 114 is close to the lens module 60. The distance between the first long side segment 113 and the central axis of the reflection element 20 is less than the distance between the second long side segment 114 and the central axis of the reflection element 20. By shortening the distance between the first long side segment 113 and the central axis of the reflection element 20, it is beneficial to improve the effect of the first light-shielding member 11 blocking the incidence of off-axis light on the side far from the lens module 60, and further improve the imaging quality of the camera module 2.

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

[0082] In some embodiments, such as Figure 11 And Figure 12As shown, the aperture-limiting member 10 includes a second light-shielding member 12, wherein the second light-shielding member 12 carries a light-transmitting member 13, and the projection of the second light-shielding member 12 along the direction of the first optical axis OA1 annularly surrounds the edge of the light-transmitting member 13. Specifically, the second light-shielding member 12 is fixedly connected to the movable carrier 30. 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. The side blocking portions 125 extend in a plane parallel to the directions of the first optical axis OA1 and 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-incident side of the reflection module 1 and is capable of carrying the light-transmitting member 13. A light-shielding structure 100 is formed on the first support portion 121, such that the reflectivity of the first support portion 121 is less than 5%. It can be understood that through the provided integral second light-shielding member 12, a supporting effect is provided for the light-transmitting member 13, thereby improving the stability of the internal components of the imaging module 2, further improving the optical path stability of the incident light entering the reflection element 20, and improving the imaging stability and imaging quality of the imaging module 2.

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

[0084] In some embodiments, as Figure 11 with Figure 12 shown, the side blocking portions 125 are oppositely arranged along the width direction of the reflection module 1. The side blocking portions 125 are provided with side inner walls 126, and the side inner walls 126 have an anti-reflection structure, such that the reflectivity of the side inner walls 126 is less than 5%. It can be understood that through the side blocking portions 125 symmetrically arranged along the third axis A3, the risk of stray light caused by the reflection phenomenon generated after the incident of the angular light is further reduced, thereby improving the imaging quality of the imaging module 2. Further, due to the anti-reflection structure of the side inner walls 126, the risk of the spot phenomenon caused by the reflection phenomenon after the incident light enters the inner cavity of the imaging module 2 provided with the reflection element 20 is reduced. On the other hand, arranging the anti-reflection structure on the side inner walls 126 is beneficial to reducing the contact between the anti-reflection structure and the outside world, further reducing the occurrence of wear and scratch phenomena, and prolonging the service life of the imaging module 2.

[0085] In some embodiments, as Figure 13As shown, the movable carrier 30 includes a mounting surface 31 and extending walls 32. The extending walls 32 extend upward from both sides of the mounting surface 31, and the mounting surface 31 is fixedly connected to the reflecting element 20. The extending walls 32 are provided with mounting edges 321 and inner wall surfaces 322. The mounting edges 321 are inclined and attached to the side blocking portions 125, and the inner wall surfaces 322 face the reflecting element 20. The inner wall surfaces 322 have anti-reflection structures, such that the reflectivity of the inner wall surfaces 322 is less than 5%. By fixedly connecting the reflecting element 20 to the mounting surface 31 of the movable carrier 30, the reflecting 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 beneficial to further enhance the mounting stability of the reflecting element 20 while realizing the anti-shake function and improve the stability during the transmission of the reflected light. On the one hand, attaching the side blocking portions 125 of the second light-shielding member 12 to the mounting edges 321 of the movable carrier 30 is beneficial to the installation of the second light-shielding member 12 and improve the usage stability. On the other hand, the anti-reflection structures provided on the inner wall surfaces 322 further compensate for the stray light reflection phenomenon caused by the insufficient coverage area of the side blocking portions 125, and improve 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. The inner surface of the carrier 51 is provided with an anti-reflection structure, such that the reflectivity of the inner surface of the carrier 51 is less than 5%. Wherein, the carrier 51 includes a first through hole 122 opening in the direction of the first optical axis OA1 and a second through hole 124 opening in the direction of 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 supporting effect. The second through hole 124 receives and emits the light transmitted by the reflecting element 20 to the lens module 60 to improve the stability of the light during transmission and further improve the imaging quality of the imaging module 2.

[0087] In other words, by providing a stable supporting effect on the light-transmitting member 13 or the light-shielding structure 100 through the carrier 51, the mounting stability of each element inside the imaging module 2 is enhanced, the stability of the light during transmission is further improved, the risk of stray light phenomenon is reduced, and thus the imaging quality and imaging stability of the imaging module 2 are increased. In other embodiments, the carrier 51 may be the outer housing of the imaging module 2, and the carrier 51 covers the base 50 to further improve the mechanical performance of the imaging module 2.

[0088] In some embodiments, the anti-reflection structure may be a blackened 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 can be understood that the blackened 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 the reflected light and enhance the imaging quality and imaging stability of the imaging module 2.

[0089] In some embodiments, the anti-reflection structure includes one or more of an arc structure, a zigzag structure, and a concave structure. Among them, the arc structure is conducive to the uniform scattering of light and reduces the risk of high reflection occurring locally; the zigzag structure directionally attenuates stray light at specific angles through multiple acute-angle reflections and quickly dissipates the energy of the stray light; the concave structure absorbs energy through multiple reflections of light to achieve deep absorption. By designing a special physical shape on the inner wall of the imaging module 2, the light propagation path is further optimized, significantly reducing the reflection phenomenon and scattering problem of stray light. The ability of the imaging module 2 to suppress stray light is significantly improved.

[0090] In some embodiments, refer to Figure 14It can be understood 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 mounted on the second support portion 123 so that the reflection element 20 is disposed between the light-transmitting member 13 and the beam expander lens 131. The light-transmitting member 13 has a positive optical power for converging light, and the beam expander lens 131 has a negative optical power for expanding light. The light-transmitting member 13 has at least one convex surface, and the beam expander lens 131 has at least one concave surface. That is to say, the light-transmitting member 13 has a positive optical power to converge light, so that the light along the first optical axis OA1 is converged after passing through the light-transmitting member 13, which can increase the amount of incident light without changing the physical aperture of the imaging module 2. That is to say, it is equivalent to increasing the effective aperture of the imaging module 2, thereby improving the imaging quality of the imaging module 2 in low-light environments. Further, the light converged by the light-transmitting member 13 remains converged after being reflected by the reflection element 20, so the required size of the beam expander lens 131 is also smaller, which is beneficial to reducing the size of the beam expander lens 131 along the first optical axis OA1 direction, and is beneficial to reducing the optical effective diameter of each optical lens in the lens module 60 along the first optical axis OA1 direction, thereby reducing the shoulder height of the imaging module 2, which is beneficial to meeting the development trend of the thinning of electronic devices. As described above, the beam expander lens 131 has a negative optical power to expand light, so that the light along the second optical axis OA2 is expanded after passing through the beam expander lens 131, increasing the coverage area of the light reaching the lens module 60. When the reflection element 20 moves during the optical image stabilization operation, due to the increased light coverage area, the influence of the movement stroke of the reflection element 20 on the position of the light on the lens module 60 is relatively small, which is beneficial to improving the image stability and making the picture more stable during shooting.

[0091] It should be understood that since the light-transmitting member 13 has a converging effect and the beam expander lens 131 has an expanding effect, and since the light-transmitting member 13 increases the amount of incident light, there are more stray lights generated after the just-converged incident light is reflected by the reflection element 20. Especially for the skew light incident at the edge, after passing through the beam expander lens 131 for beam expansion, the unexpected skew light will have a more complex propagation path, and it is difficult to avoid the generation of stray lights, thus affecting the performance of the entire optical system of the reflection module 1 and even the imaging module 2. In this application, the aperture-limiting member 10 is used to block the skew light from the light incident place, reducing the entry of unexpected incident light from the source, and further reducing the generation of stray lights in the subsequent light propagation path. While simplifying the optical path, the imaging quality and imaging stability of the imaging module 2 are improved.

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

[0093] Furthermore, as described above, the light-transmitting member 13 and the beam expander lens 131 are carried by the second light-shielding member 12. Since the size of the second light-shielding member 12 is smaller than that of the base 50, in this embodiment, mounting the light-transmitting member 13 and the beam expander lens 131 on the second light-shielding member 12 is beneficial for reducing the sizes of the light-transmitting member 13 and the beam expander lens 131 and for reducing the weights of the light-transmitting member 13 and the beam expander lens 131. In addition, the gap between the light-transmitting member 13, the reflection element 20, and the beam expander lens 131 can be made smaller, which is beneficial for making the structure of the reflection module 1 more compact.

[0094] In some embodiments, as Figure 10As shown in the figure, 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 direction of 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. 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 direction of the first optical axis OA1, where the first light-shielding member 11 serves as the upper light-shielding member, it is beneficial to block the incidence of unexpected light. While the second light-shielding member 12 with a greater length along the second optical axis OA2 provides a stable supporting effect for the light-transmitting member 13 and reduces the stray light phenomenon caused by the incident light entering the edge region. On the one hand, since the gap between the second light-shielding member 12 and the light-transmitting member 13 is smaller, the shorter the optical interface is, the more beneficial it is to reduce the uncontrollability of stray light and further improve the imaging quality. On the other hand, as described 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 can be a part subjected to silk-screen processing on the light-transmitting member 13 and / or a plastic structure attached to the edge of the light-transmitting member 13. By disposing the light-shielding structure 100 around the light-transmitting member 13, it is beneficial to reduce the aperture of the light inlet, limit the entry of the angular 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 30μm - 100μm. Further preferably, the bonding thickness between the second light-shielding member 12 and the light-transmitting member 13 is 30μm, 40μm, 50μm, 60μm, 70μm, 80μm, 90μm, 100μm. Specifically, the light-transmitting member 13 can be adhered to the second light-shielding member 12 using black glue to further enhance the blocking effect on unexpected light and reduce the risk of stray light entering the imaging module 2.

[0097] Refer to Figure 10 As can be seen, 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. Among them, the driving module 40 includes a first driving component, a second driving component, and a third driving component to 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 respectively. Each driving component can be implemented as a piezoelectric motor, a voice coil motor, a ball motor, etc.

[0098] Furthermore, since the present application uses a micro multi-lens structure as an optical path turning element, it is beneficial to reduce the shoulder height of the imaging module 2, reduce the occupied space, and thus improve the thin and light performance of the imaging module 2. It can be understood that when the micro multi-lens structure is used, more stray light will be generated on the side of the inner cavity of the imaging module 2. And when the driving module 40 drives the movable carrier 30, the movable carrier 30 can drive the reflection module 1 accordingly. Therefore, when the light-transmitting member 13 and the beam-expanding lens 131 also rotate synchronously, the optical path propagation path of the stray light becomes more complex and uncontrollable, resulting in the photosensitive module 70 receiving more chaotic light and reducing the imaging quality of the imaging module.

[0099] In other words, through the provided aperture-limiting member 10 in the present application, non-expected light is blocked before the incident light enters the imaging module 2, reducing the risk of generating stray light from the source, which is beneficial to improving the imaging quality and stability.

[0100] In at least one embodiment, the first driving assembly further includes a driving coil and a driving magnet. The driving coil further includes a first driving coil and a second driving coil. The driving magnet further includes a first driving magnet and a second driving magnet. Among them, the driving magnet is disposed on the inner surface of the base 50 on the side away from the lens module 60, and the driving coil is disposed between the inner surface of the base 50 on the side away from the lens module 60 and the driving magnet. Specifically, the first driving magnet and the first driving coil are disposed opposite to each other along the direction parallel to the third axis A3. Then, after the first driving coil is energized, the movable carrier 30 can be driven to rotate around the first optical axis OA1, and thus the reflecting element 20 can rotate around the first optical axis OA1; the second driving magnet and the second driving coil are disposed opposite to each other along the direction parallel to the third axis A3. Then, after the second driving coil is energized, the movable carrier 30 can be driven to rotate around the second axis, that is, the reflecting element 20 rotates around the second axis.

[0101] In some embodiments, the driving module 40 further includes a driving circuit. The driving circuit 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 direction, and so that 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, such as Figure 15 And Figure 16As shown in the figure, the rotation axis of the driving module 40 passes through the central axis point of the reflecting element 20. The driving module 40 drives the reflecting element 20 and the second light-shielding member 12 to rotate synchronously, so that the distance between the central axis point of the reflecting element 20 and the lens module 60 is the same as the preset value Ly. Here, Ly represents the projected distance along the second optical axis OA2 between the central axis point of the reflecting element 20 and the lens module 60 in the non-rotating state. Further, by setting the central axis point of the reflecting surface 200 in the reflecting element 20 as the rotation center of one degree of freedom, it is beneficial to ensure the blocking effect of the aperture-limiting member 10 on unexpected light. And since the linear distance between the central axis point of the reflecting element 20 and the lens module 60 remains unchanged, it is beneficial to reduce the influence of stray light incident from the edge region on the imaging process, and further enhance the imaging quality and imaging stability of the imaging module 2.

[0103] In some embodiments, as Figure 17 shown in the figure, the driving module 40 can drive the reflecting element 20 to rotate, while the second light-shielding member 12 remains stationary relative to the base 50. By the split driving, only the reflecting element 20 can be rotated, which is beneficial to reduce the energy consumption and enhance the performance of the imaging module 2.

[0104] In some embodiments, the first light-shielding member 11 can be attached around the through hole of the carrier member 51 or the upper surface edge of the light-transmitting member 13, where the aperture of the light-transmitting member 13 > (tanα)×L3 + (tanα)×L1 + Lf, and Lf = √2L / 2. Here, α represents the field-of-view angle of the imaging module 2 along the first optical axis OA1. The end of the reflecting surface 200 close to the light-transmitting member 13 is the first end 21, and the end of the reflecting surface 200 far from the light-transmitting member 13 is the second end 22. Further, L represents the length of the reflecting surface 200, and L1 represents the effective length of the reflecting surface 200, where the effective length is the length defined by the imaging perspective of the lens module 60, or it can also refer to the length at which the incident light can be normally reflected to the lens module 60 on the reflecting surface 200. L2 represents the distance between the light-shielding structure 100 and the first end 21 along the projection in the direction of the first optical axis OA1, and further represents the minimum distance between the light-shielding structure 100 and the rotation center of the reflecting surface 200. In other words, it also represents the minimum optical path length between the incident marginal light and the reflecting surface 200. Specifically, in the present application, L2 ≥ 150 μm, which is beneficial to reduce the collision phenomenon between the reflecting element 20 and the lens module 60 when the reflecting element 20 rotates, and enhance the performance of the imaging module 2. L3 represents the distance between the light-shielding structure 100 and the second end 22 along the projection in the direction of the first optical axis OA1, which represents the distance between the light-shielding structure 100 and the second end 22 along the projection in the direction of the first optical axis OA1, and further represents the maximum distance between the light-shielding structure 100 and the rotation center of the reflecting surface 200. In other words, it also represents the maximum optical path length between the incident marginal light and the reflecting surface 200.

[0105] In some embodiments, the distance between the central axis point of the reflection element 20 and the anti-reflection 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 with respect to the direction of the second optical axis OA2 is Dz. Specifically, in this application, L4≥Lf + 2Dz is satisfied. On the one hand, by ensuring a sufficient distance between the reflection element 20 and the anti-reflection structure, it is beneficial to reduce the loss of light during the reflection process and reduce the occurrence of optical distortion phenomena, thereby improving the brightness and clarity of imaging. On the other hand, when there is an installation deviation Dz of 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 beneficial to reducing the assembly accuracy requirements, reducing production costs and risks. It can be understood that the reserved space is also beneficial to reducing the error generated when the reflection 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, referring to Figure 14 As can be seen, the camera module 2 further includes a lens module 60, and the incident light passes through the reflection module 1, and the original optical path turns and then reaches 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 direction. Through this design, the size of the lens module 60 can be effectively reduced, thereby reducing the height and volume of the entire camera module 2, and further enhancing the portability of the camera module 2 when applied to an electronic device.

[0107] In some embodiments, the lens module 60 includes a plurality of lenses, and the lens module 60 is used to image light on the 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 direction.

[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 to say, the first lens group is fixed to the base 50, and the second lens group is carried by a carrier. The carrier carrying the second lens group is driven by a focusing drive assembly to move along the second optical axis OA2 direction. Furthermore, by adjusting the relative positions of the first lens group and the second lens group, the optical focusing function of the camera module 2 can be realized. In addition, the relative position between 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 further include a third lens group and / or a fourth lens group, and the third lens group and / or the fourth lens group can move along the second optical axis OA2 direction to achieve the optical zoom function. This application does not make specific limitations 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. The photosensitive chip is configured to receive 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 driving chips, memory chips, etc.

[0111] According to another aspect of the present application, a periscope camera module 2 includes the reflection module 1 as described above; 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 configured to drive the movable carrier to rotate; the base has a receiving cavity, and the reflection module and the lens module are disposed in the receiving cavity. By providing the reflection module 1, the incidence of non-expected deflected light is reduced from the light incident side, enhancing the imaging stability and imaging quality of the camera module 2. On the one hand, by driving the movable carrier 30 by the driving module 40 to drive the reflection element 20 and / or the aperture limiting member 10 to move, while better adapting to application environments with various light shielding requirements, the anti-shake processing is beneficial to improving the imaging quality and stability of the image. On the other hand, by folding the optical path, it is beneficial to reduce the occupied space of the camera module 2, realizing the thin and light design requirements of the camera module 2, and further enhancing the market competitiveness.

[0112] In some embodiments, as Figure 18 shown, the light shielding structure 100 can also be set as a sheet-like component along the direction parallel to the second optical axis OA2 and attached to the light incident port of the carrier 51 in the camera module 2. Among them, since the light shielding structure 100 provided at the entrance blocks the incidence of non-expected deflected light, further reducing the influence of stray light on imaging. It can be understood that since the light shielding structure 100 is provided on the carrier 51 of the camera module 2, it is convenient for disassembly and installation, and preferably enhances the production and assembly efficiency. 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 the light shielding structure 100 on the carrier 51, it is possible to avoid the occurrence of specular reflection or scattering phenomena that may be caused when an external strong light source, such as sunlight or lamp light, directly irradiates the edge of the lens or the inner wall of the inner cavity of the camera module 2, 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 along the direction parallel to the second optical axis OA2, can also be attached to the inner peripheral wall of the light-incident port of the carrier 51 of the imaging module 2. Since the aperture limiter is disposed inside the imaging module 2, the height of the overall imaging module 2 in the direction of the first optical axis OA1 is preferably reduced, so that the light-shielding structure 100 is more stably installed inside the imaging 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, such as Figure 19 shown, an assembly groove may also be provided at the edge of the light-incident port of the carrier 51 of the imaging module 2 to assemble the light-shielding structure 100 disposed on the outer peripheral wall. Through the provided assembly groove, the stability of the light-shielding structure 100 after installation is further improved. Therefore, the incident light can enter the imaging module 2 more stably, enhancing the stability of imaging.

[0116] In some embodiments, the length of the light-incident port of the carrier 51 of the imaging module 2 and the light-shielding structure 100 along the second optical axis OA2 can also be extended, which is beneficial to reducing the total weight of the imaging module 2, thereby meeting the requirement of thinning of the imaging module 2. It can be understood that the light-shielding structure 100 attached to the carrier 51 is convenient for adjustment and assembly, and can preferably improve the production and assembly efficiency.

[0117] In some embodiments, such as Figure 1 shown, the projection area of the reflection module 1 on the carrier 51 of the imaging module 2 along the second optical axis OA2 can also be only raised to form a stepped structure, further reducing the occupied space of the imaging module 2, which is beneficial to enhancing the portability and thinness of the imaging module 2.

[0118] The basic principles, main features and advantages of the present application have been described above. Those skilled in the art of this industry should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended 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: The invention further comprises an aperture-limiting component, wherein the aperture-limiting component comprises a light-shielding structure, a light-transmitting member and a bearing member, wherein the bearing member is provided with a through hole, wherein the light-transmitting member and the through hole of the bearing member are coaxially arranged along the first optical axis, wherein the light-transmitting member and the reflecting element are arranged opposite to each other along the first optical axis direction, wherein the light-transmitting member and the light-shielding structure are located on the light-incoming side of the reflecting module, wherein the projection of the light-shielding structure along the first optical axis direction annularly surrounds the projection edge of the light-transmitting member along the first optical axis direction, thereby limiting the amount of light entering the edge of the light-transmitting member; Among them, the aperture of the light-transmitting component is greater than (tanα)×L3+(tanα)×L1+Lf, Lf=√2L / 2, α is the field 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 structure and the end of the reflective surface away from the light-transmitting component projected along the first optical axis.

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 light shielding member may be attached to the periphery of the through hole of the carrier or to the edge of the upper surface of the light-transmitting member.

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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