Optical transmission components, camera modules and electronic equipment

Abstract

This application relates to an optical transmission element, a shooting module, and an electronic device. The main body of the optical transmission element has a light-transmitting surface, a first reflective surface, and a second reflective surface. The light-transmitting surface has an incident light area and an exit light area. The first reflective surface is inclined to the light-transmitting surface and disposed corresponding to the incident light area. The second reflective surface is inclined to the light-transmitting surface and disposed corresponding to the exit light area. The main body also has a bottom surface, which connects the first reflective surface and the second reflective surface and is disposed opposite to the light-transmitting surface. The optical transmission element is configured such that at least a portion of the light incident from the incident light area onto the first reflective surface can be reflected by the first reflective surface to the light-transmitting surface, and then reflected by the light-transmitting surface to the second reflective surface, and subsequently reflected by the second reflective surface and exiting from the exit light area. This optical transmission element, while deflecting the light path, can also reduce the size of the shooting module.

Description

Technical Field

[0001] The present application relates to the technical field of camera devices, and in particular to an optical transmission element, a shooting module and an electronic device. Background Art

[0002] More and more electronic devices such as smart phones, tablet computers, and e-readers are equipped with camera modules to realize the shooting function. In order to make the telephoto design of the camera module adapt to the structural layout of the electronic device and reduce the thickness of the electronic device, a periscope camera module has emerged. The periscope camera module is equipped with optical transmission elements such as prisms to deflect the light path, thereby compressing the size of the camera module in the thickness direction of the electronic device. However, in the current periscope camera module, the setting of the optical transmission element is also likely to increase the size of the camera module. Summary of the invention

[0003] The embodiments of the present application provide an optical transmission element, a shooting module and an electronic device to solve the problem that the provision of the optical transmission element easily increases the size of the shooting module.

[0004] An optical transmission element, wherein the main body of the optical transmission element has a light-transmitting surface, a first reflection surface and a second reflection surface, the light-transmitting surface has a light-entry area and a light-exiting area, the first reflection surface is inclined to the light-transmitting surface and is arranged corresponding to the light-entry area, the second reflection surface is inclined to the light-transmitting surface and is arranged corresponding to the light-exiting area, the main body also has a bottom surface, the bottom surface connects the first reflection surface and the second reflection surface and is arranged opposite to the light-transmitting surface, and the optical transmission element is configured such that at least part of the light incident from the light-entry area to the first reflection surface can be reflected from the first reflection surface to the light-transmitting surface, and reflected from the light-transmitting surface to the second reflection surface, and then emitted from the light-exiting area through reflection from the second reflection surface.

[0005] In the optical transmission element, at least part of the light incident on the main body from the light incident area is reflected by the first reflection surface to the light transmission surface, then reflected by the light transmission surface to the second reflection surface, and then reflected by the second reflection surface to the light exit area, and then exits the optical transmission element from the light exit area. The bottom surface is arranged to connect the first reflection surface and the second reflection surface, so that the cross section of the main body of the optical transmission element is roughly trapezoidal, which can effectively reduce the size of the main body in the direction from the light transmission surface to the bottom surface, compared with the first reflection surface and the second reflection surface being directly connected so that the cross section of the main body is roughly triangular, so that the optical transmission element can compress the size of the shooting module while deflecting the light path.

[0006] A shooting module comprises a lens, an image sensor and the above-mentioned transmission optical element, wherein the light incident area is arranged corresponding to the light emitting side of the lens, and the light emitting area is arranged corresponding to the photosensitive surface of the image sensor.

[0007] An electronic device comprises a housing and the above-mentioned shooting module, wherein the housing is provided with a light inlet hole, and the light incident side of the lens is arranged corresponding to the light inlet hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 Schematic diagram of the structure of electronic equipment in some embodiments.

[0010] Figure 2 Schematic diagram of the structure of the shooting module in some embodiments.

[0011] Figure 3 Schematic diagram of the structure in which the second light absorbing film is disposed on the first sub-prism in some embodiments.

[0012] Figure 4 Schematic diagram of the structure in which the third light absorbing film is disposed on the first reflecting surface in some embodiments.

[0013] Figure 5 This is a schematic diagram of the structure in which a fifth light absorbing film is disposed on the light-transmitting surface in some embodiments.

[0014] Figure 6 A schematic diagram of a structure in which a diffuse reflection surface is provided in a light absorption region of a light-transmitting surface in some embodiments.

[0015] Figure 7 Schematic cross-sectional view of the emission film in some embodiments.

[0016] Figure 8 for Figure 7 The reflectivity curve of the reflective film shown.

[0017] Fig. 9 Schematic cross-sectional views of reflective films in other embodiments.

[0018] Fig.10 for Fig. 9 The reflectivity curve of the reflective film shown.

[0019] Fig.11 Schematic cross-sectional views of reflective films in some other embodiments.

[0020] Fig.12 Schematic cross-sectional view of the reflective film in some further embodiments.

[0021] Fig.13 for Fig.12 The reflectivity curve of the reflective film shown.

[0022] Fig.14 This is a cross-sectional schematic diagram of the reflective film in some embodiments in which the first protective film is omitted.

[0023] Fig.15 for Fig.14 The reflectivity curve of the reflective film shown.

[0024] Fig.16 Schematic cross-sectional view of the film structure of the second light absorbing film in some embodiments.

[0025] Fig.17 is a reflectivity curve diagram of the second light absorbing film in some embodiments.

[0026] Fig.18 OD value curve of the second light absorbing film in some embodiments.

[0027] Fig.19 Schematic diagram of the structure of other components of the electronic device in some embodiments.

[0028] Reference numerals:

[0029] 10. electronic device; 11. housing; 111. light inlet; 12. shooting module; 121. lens; 1211. lens; 122. image sensor; 123. optical transmission element; 1231. main body; 1232. first reflection surface; 1233. second reflection surface; 1234. light transmission surface; 1235. light entry area; 1236. light exit area; 1237. light absorption area; 1238. assembly position; 12 39. bottom surface; 1241. first sub-prism; 1242. second sub-prism; 1243. chamfer; 1244. first light absorbing film; 1245. second light absorbing film; 1246. opening; 1247. light absorbing element; 1248. third light absorbing film; 1249. fourth light absorbing film; 125. infrared filter; 126. first reflection area; 127. second reflection area; 128. reflection film; 129. fifth light absorbing film. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0031] As used herein, "electronic device" refers to a device that can receive and / or send communication signals, including but not limited to a device that is connected via any one or more of the following connection methods:

[0032] (1) Connection via wired lines, such as Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, and direct cable connection;

[0033] (2) Via wireless interfaces, such as cellular networks, wireless local area networks (WLAN), digital television networks such as DVB-H networks, satellite networks, and AM-FM broadcast transmitters.

[0034] An electronic device configured to communicate via a wireless interface may be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

[0035] (1) Satellite phone or cellular phone;

[0036] (2) Personal Communications System (PCS) terminals that can combine cellular radio telephones with data processing, fax, and data communications capabilities;

[0037] (3) Radiotelephone, pager, Internet / intranet access, Web browser, notepad, calendar, Personal Digital Assistant (PDA) equipped with a Global Positioning System (GPS) receiver;

[0038] (4) conventional laptop and / or palmtop receivers;

[0039] (5) Conventional laptop and / or palmtop radiotelephone transceivers, etc.

[0040] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the structure of the electronic device 10 in some embodiments, Figure 2 Schematic diagram of the structure of the shooting module 12 in some embodiments. The electronic device 10 provided in this application includes but is not limited to a device with a shooting function such as a smart phone, a tablet computer, an e-reader, a wearable device, etc., and the electronic device 10 in the embodiment of this application is exemplified by taking a smart phone as an example.

[0041] In some embodiments, the electronic device 10 includes a housing 11 and a camera module 12, the camera module 12 is disposed in the housing 11, and the electronic device 10 is provided with the camera module 12 to realize the camera function. The camera module 12 can be designed as a periscope structure to compress the size of the camera module 12 in the thickness direction of the electronic device 10, thereby facilitating the optimization of the structural layout of the electronic device 10 and compressing the thickness of the electronic device 10. The assembly relationship between the housing 11 and the camera module 12 is not limited, and can be specifically designed according to the structural layout of the electronic device 10. For example, in some embodiments, the housing 11 includes a middle frame, a front cover plate and a rear cover plate, the middle frame can be roughly in the shape of a rectangular frame, the front cover plate and the rear cover plate can be respectively disposed on both sides of the middle frame to form a housing space together with the middle frame, and the camera module 12 can be accommodated in the housing space of the housing 11. In the present application, the direction from the front cover plate of the housing 11 to the rear cover plate can be regarded as the thickness direction of the electronic device 10.

[0042] In some embodiments, the camera module 12 includes a lens 121, an image sensor 122, and an optical transmission element 123. The lens 121 is used to collect light. The lens 121 may include multiple lenses 1211 with optical power. The cooperation of the multiple lenses 1211 can correct aberrations while collecting light, thereby improving the imaging quality of the camera module 12. The image sensor 122 includes but is not limited to a charge coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS Sensor). The optical transmission element 123 is used to transmit the light from the lens 121 to the image sensor 122 for imaging, so that the electronic device 10 can realize the image acquisition function. In some embodiments, the housing 11 is provided with a light inlet 111 that penetrates the housing. When the camera module 12 is accommodated in the housing 11, the light entrance side of the lens 121 corresponds to the light inlet 111, so as to collect the light entering the light inlet 111. The optical axis direction of the lens 121 can be roughly parallel to the thickness direction of the electronic device 10. The optical transmission element 123 is set to deflect the light path while transmitting the light, thereby realizing a periscope structure design, which is beneficial to compressing the size of the shooting module 12 in the thickness direction of the electronic device 10.

[0043] The lens 121 may include a plurality of lenses 1211 with optical power, and the number and type of the lenses 1211 of the lens 121 are not limited. In some embodiments, the lens 121 includes four lenses 1211 spaced apart from each other in sequence along the optical axis. The first lens 1211 of the lens 121, i.e., the lens 1211 closest to the light inlet 111, may be made of glass and processed by grinding, mainly for correcting aberrations and eliminating temperature drift. The other three lenses 1211 of the lens 121 may be made of plastic and processed by injection molding, mainly for correcting aberrations. It should be understood that this embodiment only exemplarily lists the materials and processing methods of the above-mentioned lenses 1211, but is not limited thereto. Those skilled in the art may flexibly select according to actual needs.

[0044] refer to Figure 2 As shown, in some embodiments, the optical axis of the lens 121 and the axis of the image sensor 122 are substantially parallel to each other, the optical transmission element 123 is configured to be able to deflect the optical path by 180°, and the area of ​​the optical transmission element 123 for receiving the light from the lens 121 and the area for emitting the light to the image sensor 122 may face the same side. In some embodiments, the optical transmission element 123 has a light entrance area 1235 and a light exit area 1236, the light entrance area 1235 is arranged corresponding to the light exit side of the lens 121 and is used to receive the light from the lens 121, and the light exit area 1236 is arranged corresponding to the photosensitive surface of the image sensor 122 and is used to emit the light to the image sensor 122. In some embodiments, the light entrance area 1235 and the light exit area 1236 are coplanar, and the planes where the light entrance area 1235 and the light exit area 1236 are located are substantially perpendicular to the optical axis of the lens 121 and the axis of the image sensor 122.

[0045] It should be noted that the optical transmission element 123 can bend the optical path by 180°, so that the lens 121 and the image sensor 122 can be arranged on the same side of the optical transmission element 123, so that the lens 121 and the image sensor 122 at least partially overlap in the optical axis direction of the lens 121, which is conducive to reducing the size of the shooting module 12 in the thickness direction of the electronic device 10 and compressing the space occupied by the shooting module 12 in the thickness direction of the electronic device 10. In the present application, the axis of the image sensor 122 can be perpendicular to the photosensitive surface of the image sensor 122.

[0046] In some embodiments, the optical transmission element 123 is configured to transmit the light from the lens 121 to the image sensor 122 after at least three reflections, which is beneficial to extend the propagation path of the light at the rear end of the lens 121, so that the optical transmission element 123 can adapt to the telephoto design of the lens 121, and compress the occupied space of the shooting module 12 while obtaining sufficient optical magnification.

[0047] In some embodiments, the optical transmission element 123 has a first reflective surface 1232, a second reflective surface 1233, and a light-transmitting surface 1234. The light-entering region 1235 and the light-emitting region 1236 are both formed on the light-transmitting surface 1234. In other words, different regions of the light-transmitting surface 1234 are respectively opposite to the lens 121 and the image sensor 122. The first reflective surface 1232 is inclined to the light-transmitting surface 1234 and is disposed corresponding to the light-entering region 1235. The second reflective surface 1233 is inclined to the light-transmitting surface 1234 and is disposed corresponding to the light-emitting region 1236. At least part of the light from the lens 121 enters the optical conductive element 123 from the light incident area 1235 and is incident on the first reflective surface 1232. The first reflective surface 1232 can reflect at least part of the light incident on the first reflective surface 1232 to the light-transmitting surface 1234. The light-transmitting surface 1234 can reflect at least part of the light reflected from the first reflective surface 1232 to the light-transmitting surface 1234 to the second reflective surface 1233. The second reflective surface 1233 can reflect at least part of the light reflected from the light-transmitting surface 1234 to the second reflective surface 1233 to the light-exiting area 1236, so that at least part of the light is emitted from the optical conductive element 123 from the light-exiting area 1236 and is incident on the image sensor 122. With reference to the above description, the light-transmitting surface 1234 can be substantially perpendicular to the optical axis of the lens 121 and the axis of the image sensor 122.

[0048] In some embodiments, the angles between the first reflective surface 1232 and the second reflective surface 1233 and the light-transmitting surface 1234 are both greater than or equal to 25° and less than or equal to 35°, for example, 32.5°. This arrangement can improve the efficiency and accuracy of light reflection by the first reflective surface 1232, the second reflective surface 1233, and the light-transmitting surface 1234, so that the optical transmission element 123 can smoothly deflect the light path by 180°.

[0049] The optical transmission element 123 in this embodiment can reflect at least part of the light three times and then project it onto the image sensor 122, so that the optical transmission element 123 is suitable for the telephoto design of the lens 121. Through the periscope design, the size of the shooting module 12 in the thickness direction of the electronic device 10 is compressed while matching the telephoto lens 121, for example, it is suitable for the lens 121 with a magnification of 2 times to 4 times (equivalent focal length is approximately 40mm-90mm). When the lens 121 of the shooting module 12 has a higher magnification, the optical transmission element 123 can also deflect the light more times to further extend the propagation path of the light in the optical transmission element 123 to adapt to the telephoto design of the lens 121.

[0050] It should be noted that the first reflective surface 1232 and the second reflective surface 1233 may be connected to each other, that is, the optical conductive element 123 may be substantially in the shape of a prism. Figure 2As shown, in some embodiments, the optical conductive element 123 may also have a bottom surface 1239 connecting the first reflective surface 1232 and the second reflective surface 1233, and the bottom surface 1239 is arranged opposite to the light-transmitting surface 1234, for example, the bottom surface 1239 is substantially parallel to the light-transmitting surface 1234, and the cross section of the optical conductive element 123 may be substantially in the shape of an isosceles trapezoid. Of course, the bottom surface 1239 should be arranged to avoid the effective field of view of the first reflective surface 1232 and the second reflective surface 1233, or partially correspond to the stray light portion at the edge of the effective field of view, so as not to affect the normal imaging of the camera module 12. The bottom surface 1239 of the optical conductive element 123 may be formed by cutting on the basis of a prism, or may be directly formed during the injection molding process. Without affecting the imaging quality of the shooting module 12, setting the bottom surface 1239 can reduce the size of the optical transmission element 123 in the optical axis direction of the lens 121 compared to using a prism as the optical transmission element 123, thereby further compressing the size of the shooting module 12 in the thickness direction of the electronic device 10.

[0051] In some embodiments, the main body 1231 of the optical transmission element 123 may be a prism, and the first reflection surface 1232, the second reflection surface 1233, the light-transmitting surface 1234, and the bottom surface 1239 are all disposed on the main body 1231. The material of the main body 1231 includes, but is not limited to, glass or plastic, and the refractive index of the main body 1231 may be between 1.5 and 1.9, which can effectively deflect the light path and realize the periscope design of the camera module 12. For example, the material of the main body 1231 may be glass, and the refractive index of the main body 1231 may be 1.61.

[0052] In some embodiments, the optical transmission element 123 further includes a first light absorbing film 1244, which is disposed on the bottom surface 1239 of the main body 1231. The first light absorbing film 1244 can cover the entire bottom surface 1239. The material of the first light absorbing film 1244 can be any applicable material with good light absorbing ability, such as ink. The first light absorbing film 1244 can effectively absorb the light incident on the bottom surface 1239, prevent the light from reflecting on the bottom surface 1239 to form stray light, thereby improving the imaging quality of the camera module 12. In some embodiments, the bottom surface 1239 is set as a diffuse reflection surface, including but not limited to a fogged surface or a frosted surface. Setting the bottom surface 1239 as a diffuse reflection surface can scatter the light incident on the bottom surface 1239 and reduce the brightness of the light, which is beneficial for making the light easier to be absorbed by the first light-absorbing film 1244 and can also reduce the brightness of the light reflected by the bottom surface 1239, thereby reducing the brightness of the stray light in the optical transmission element 123 and preventing the stray light from affecting the imaging quality of the shooting module 12.

[0053] The main body 1231 can be a whole prism or a plurality of prisms glued together, as long as the effect of deflecting the light path can be achieved. In some embodiments, the main body 1231 includes a first sub-prism 1241 and a second sub-prism 1242, and the first sub-prism 1241 and the second sub-prism 1242 are glued together by optical glue to form the main body 1231. The side of the first sub-prism 1241 facing away from the second sub-prism 1242 forms a first reflection surface 1232, and the side of the second sub-prism 1242 facing away from the first sub-prism 1241 forms a second reflection surface 1233. The surface of the first sub-prism 1241 facing the lens 121 and the surface of the second sub-prism 1242 facing the image sensor 122 together form a light-transmitting surface 1234, and the surface of the first sub-prism 1241 facing away from the lens 121 and the surface of the second sub-prism 1242 facing away from the image sensor 122 together form a bottom surface 1239.

[0054] Combination Figure 2 and Figure 3 As shown, in some embodiments, the optical transmission element 123 further includes a second light absorbing film 1245, which is disposed at the junction of the first sub-prism 1241 and the second sub-prism 1242. For example, the two opposite sides of the second light absorbing film 1245 are respectively attached to the surface of the first sub-prism 1241 facing the second sub-prism 1242 and the surface of the second sub-prism 1242 facing the first sub-prism 1241. The second light absorbing film 1245 may also have only one surface attached to the first sub-prism 1241 or the second sub-prism 1242, and the other surface attached to the optical glue between the first sub-prism 1241 and the second sub-prism 1242. The material of the second light absorbing film 1245 includes, but is not limited to, any applicable material with good light absorbing properties, such as ink. The second light-absorbing film 1245 defines a light-clearing aperture between the first sub-prism 1241 and the second sub-prism 1242. It can be understood that when the light propagating in the optical transmission element 123 passes through the second light-absorbing film 1245, only the light within the range of the light-clearing aperture defined by the second light-absorbing film 1245 can pass through the second light-absorbing film 1245, and the remaining light can be absorbed by the second light-absorbing film 1245, which is beneficial to further reduce the stray light component in the shooting module 12 and improve the imaging quality of the shooting module 12.

[0055] In some embodiments, the projections of the second light absorbing film 1245 on the surfaces opposite to the first sub-prism 1241 and the second sub-prism 1242 form an opening 1246 facing the light-transmitting surface 1234, and the opening 1246 corresponds to the light-transmitting aperture area. Thus, the second light absorbing film 1245 can absorb at least part of the stray light reflected from the first reflective surface 1232 to the light-transmitting surface 1234, and can also absorb at least part of the stray light reflected from the light-transmitting surface 1234 to the second reflective surface 1233, thereby effectively suppressing the stray light component of the camera module 12.

[0056] Further, refer to Figure 3 As shown, in some embodiments, at least part of the edge of the second light absorbing film 1245 corresponding to the opening 1246 is set as an arc edge. Setting the arc edge is conducive to improving the diffraction effect of light at the edge of the second light absorbing film 1245, thereby suppressing the generation of diffraction stray light, and is also conducive to improving the imaging quality of the shooting module 12. In some embodiments, the edge of the second light absorbing film 1245 corresponding to the opening 1246 is set to a periodically distributed arc edge, wherein the radius of each arc can be 0.1mm-0.3mm, for example, can be 0.2mm. Such a setting can effectively improve the diffraction effect of the edge of the second light absorbing film 1245 corresponding to the opening 1246 on the light, thereby effectively suppressing the generation of diffraction stray light.

[0057] The two opposite edges of the light-transmitting surface 1234 can be connected to the first reflecting surface 1232 and the second reflecting surface 1233 respectively. Figure 2 As shown, in the embodiment of the present application, the transition between the light-transmitting surface 1234 and the first reflecting surface 1232, and the transition between the light-transmitting surface 1234 and the second reflecting surface 1233 are both provided with a chamfer 1243 transition, and the chamfer 1243 may be inclined to the light-transmitting surface 1234 or perpendicular to the light-transmitting surface 1234. Compared with the case where the first reflecting surface 1232 and the second reflecting surface 1233 are directly connected to the light-transmitting surface 1234, the chamfer 1243 can prevent the two ends of the main body 1231 from being too sharp, thereby preventing the optical conductive element 123 from having broken edges during the production or assembly process.

[0058] In some embodiments, the optical transmission element 123 further includes a light absorbing member 1247 disposed between the light-transmitting surface 1234 and the first reflective surface 1232, and disposed at the chamfer 1243 between the light-transmitting surface 1234 and the second reflective surface 1233. The light absorbing member 1247 may cover the surface of the chamfer 1243, and the material of the light absorbing member 1247 includes but is not limited to a material with good light absorbing properties such as ink. The light absorbing member 1247 is disposed at the chamfer 1243 to absorb the light incident on the chamfer 1243, and prevent the light from being reflected at the chamfer 1243 to form stray light, which is also conducive to reducing the stray light component in the camera module 12 and improving the imaging quality of the camera module 12.

[0059] In some embodiments, the optical transmission element 123 further includes a third light absorbing film 1248 and a fourth light absorbing film 1249. The third light absorbing film 1248 is disposed on the first reflective surface 1232, and defines the light aperture of the first reflective surface 1232. The fourth light absorbing film 1249 is disposed on the second reflective surface 1233, and defines the light aperture of the second reflective surface 1233. The materials of the third light absorbing film 1248 and the fourth light absorbing film 1249 include but are not limited to materials with good light absorbing properties such as ink. The third light absorbing film 1248 and the fourth light absorbing film 1249 can absorb the light that is incident on the first reflective surface 1232 and the second reflective surface 1233 and is located outside the light aperture range, and prevent the light from being reflected on the first reflective surface 1232 and the second reflective surface 1233 to form stray light, which is also conducive to reducing the stray light component in the camera module 12 and improving the imaging quality of the camera module 12. It can be understood that the areas on the first reflection surface 1232 and the second reflection surface 1233 for reflecting light so that the light can participate in the imaging of the shooting module 12 can be regarded as the light aperture areas of the first reflection surface 1232 and the second reflection surface 1233. Light within the light aperture range of the first reflection surface 1232 and the second reflection surface 1233 can be reflected and finally hit the image sensor 122 to participate in the imaging of the shooting module 12. Therefore, it can be understood why the third light absorption film 1248 defines the first reflection area 126 on the first reflection surface 1232, and why the fourth light absorption film 1249 defines the second reflection area 127 on the second reflection surface 1233. The first reflection area 126 corresponds to the light aperture range of the first reflection surface 1232, and the second reflection area 127 corresponds to the light aperture range of the second reflection surface 1233. Both the first reflection area 126 and the second reflection area 127 can reflect light.

[0060] It can be understood that, through the reasonable design of the angles and orientations of the first reflective surface 1232, the second reflective surface 1233 and the light-transmitting surface 1234, and the refractive index of the main body 1231, the incident angle of the light reflected by the first reflective surface 1232 to the light-transmitting surface 1234 on the light-transmitting surface 1234 meets the requirement of total reflection, which can improve the reflectivity of the light on the light-transmitting surface 1234, and improve the utilization efficiency and imaging quality of the light. However, the incident angle of the light on the first reflective surface 1232 and the second reflective surface 1233 is small, and it is difficult to reach the critical angle of total reflection. Therefore, in order to improve the reflectivity of the light on the first reflective surface 1232 and the second reflective surface 1233, so as to improve the light utilization efficiency and imaging quality of the shooting module 12, in some embodiments, a reflective film 128 may be further provided on the first reflective area 126 of the first reflective surface 1232 and the second reflective area 127 of the second reflective surface 1233, and the reflective film 128 can improve the reflectivity of the light on the first reflective area 126 and the second reflective area 127. The reflective film 128 includes but is not limited to a metal film layer with good reflective properties, such as a silver coating.

[0061] Combination Figure 2 and Figure 3 As shown, it can be understood that the first reflection area 126 and the second reflection area 127 can be roughly square, and when a chamfer 1243 is provided at the transition between the light-transmitting surface 1234 and the first reflection surface 1232 and the second reflection surface 1233, the third light-absorbing film 1248 and the fourth light-absorbing film 1249 can be jointly surrounded by the light-absorbing member 1247 on the chamfer 1243 to form a roughly annular area, and when the main body 1231 is not provided with a chamfer 1243, the third light-absorbing film 1248 and the fourth light-absorbing film 1249 can be roughly annular.

[0062] Combination Figure 2 , Figure 5 and Figure 6As shown, in some embodiments, the light-transmitting surface 1234 is provided with a substantially annular light-absorbing region 1237, the light-entering region 1235 and the light-exiting region 1236 are both provided within the range surrounded by the light-absorbing region 1237, and the light-entering region 1235 and the light-exiting region 1236 may be two adjacent or spaced regions within the light-absorbing region 1237. In some embodiments, the optical transmission element 123 may further include a fifth light-absorbing film 129 provided in the light-absorbing region 1237, and the fifth light-absorbing film 129 covers at least a portion of the light-absorbing region 1237. The material of the fifth light-absorbing film 129 includes, but is not limited to, a material having good light-absorbing properties such as ink. The fifth light absorbing film 129 can absorb the light emitted from the main body 1231 to the light absorbing region 1237, preventing the light from being reflected or entering the main body 1231 to form stray light. The fifth light absorbing film 129 can also absorb the light emitted from the main body 1231 to the light absorbing region 1237, preventing the light from being reflected to form stray light, thereby helping to reduce the stray light component in the shooting module 12 and improve the imaging quality of the shooting module 12. In some embodiments, an assembly position 1238 may also be provided in the light absorbing region 1237, and the fifth light absorbing film 129 avoids the assembly position 1238. The assembly position 1238 and the fifth light absorbing film 129 are provided to form a color visual difference, so as to facilitate the alignment and assembly of the structural parts of the lens 121, the image sensor 122 or the optical transmission element 123, which is conducive to improving the assembly accuracy of each component in the shooting module 12 and improving the imaging quality of the shooting module 12.

[0063] Further, refer to Figure 6 As shown, in some embodiments, the portion of the light-transmitting surface 1234 corresponding to the light-absorbing region 1237 is set as a diffuse reflection surface, such as a fogged surface or a frosted surface. In this way, the light incident on the light-absorbing region 1237 can be scattered to reduce the brightness of the light, which is conducive to making the light more easily absorbed by the fifth light-absorbing film 129, and is also conducive to reducing the brightness of the light reflected in the light-absorbing region 1237, thereby reducing the influence of stray light on imaging quality.

[0064] It should be noted that, in order to facilitate the distinction between the various components, in the various drawings of the present application, the various components with light absorption function are indicated by cross-section lines, for example, Figure 2-Figure 5 In FIG. 1 , each light absorbing film and light absorbing member 1247 are indicated by cross-section lines. Figure 6 The above-mentioned light absorbing films and light absorbing members 1247 can be formed on the main body 1231 by silk screen printing or spin coating, or by coating.

[0065] In some embodiments, the shooting module 12 may also include an infrared filter 125, which may be disposed between the optical transmission element 123 and the image sensor 122. The infrared filter 125 may be used to filter out interference light to prevent the interference light from reaching the image sensor 122 and affecting the normal imaging of the shooting module 12.

[0066] Furthermore, combined with Figure 2 and Figure 7 As shown, in some embodiments, the reflective film 128 on the first reflective surface 1232 and the second reflective surface 1233 includes a first anti-reflection film 1141, a first protective film 1142, an aluminum (Al) film 1143, and a second protective film 1144 which are stacked in sequence. The first anti-reflection film 1141 includes a silicon dioxide (SIO2) layer and a titanium dioxide (TIO2) layer disposed on the silicon dioxide layer toward the first protective film 1142. When the reflective film 128114 is disposed on the first reflective surface 1232 or the second reflective surface 1233, the first anti-reflection film 1141 of the reflective surface is disposed toward the main body 1231, and the silicon dioxide layer in the first anti-reflection film 1141 is close to the main body 1231. The first protective film 1142 and the second protective film 1144 both include an aluminum oxide (Al2O3) layer attached to the aluminum film 1143.

[0067] The above-mentioned reflective film 128 is provided with an aluminum film 1143 to play a major reflective role, which can greatly improve the reflectivity of the first reflective surface 1232 and the second reflective surface 1233 to light. At the same time, a first anti-reflective film 1141 is provided facing the main body 1231. The cooperation of the titanium dioxide layer and the aluminum oxide layer in the first anti-reflective film 1141 can effectively improve the reflection efficiency of the reflective film 128 to light. With the reflection effect of the aluminum film 1143, the reflective film 128 has good reflection efficiency. When the reflective film 128 is provided on the first reflective surface 1232 and the second reflective surface 1233, the first reflective surface 1232 and the second reflective surface 1233 can reflect more light, which is beneficial to improve the light utilization efficiency and aperture of the shooting module 12, reduce the loss of light on the reflective film 128, and thus improve the shooting quality. At the same time, the aluminum oxide in the first protective film 1142 and the second protective film 1144 can be closely combined with the aluminum film 1143 to prevent the aluminum film 1143 from being oxidized and affecting the reflection efficiency, thereby improving the performance stability of the reflective film 128. In the first anti-reflection film 1141 , a silicon dioxide layer is arranged on the side of the titanium dioxide layer facing away from the first protective film 1142 , which can effectively improve the reflectivity of the reflective film 128 while also providing good protection for the titanium dioxide layer, and is also beneficial to improving the performance stability and structural strength of the reflective film 128 .

[0068] In some embodiments, the layer structure of the reflective film 128 and the thickness of each layer structure are given in Table 1 below. The reflective film 128 shown in Table 1 corresponds to Figure 7The reflective film 128 in the embodiment shown. It can be seen from Table 1 that when the reflective film 128 is disposed on the main body 1231, the first anti-reflective film 1141 is disposed close to the main body 1231, and the medium on the side of the reflective film 128 facing away from the main body 1231 can be air. The total thickness of the reflective film 128 in the embodiment corresponding to Table 1 is 362.89nm, and the increase in optical surface flatness (PV) is less than 0.05λ, which has the effects of small thickness, high flatness, and good quality of reflected light while improving the reflectivity.

[0069] Table 1

[0070]

[0071] Combination Figure 2 , Figure 7 As shown in Table 1, in some embodiments, the first protective film 1142 also includes a silicon dioxide layer disposed on the aluminum oxide layer facing away from the aluminum film 1143, and the second protective film 1144 may also include a silicon dioxide layer attached to the aluminum oxide layer facing away from the aluminum film 1143. The silicon dioxide layer has sufficient structural strength and anti-oxidation performance, can provide good protection for the aluminum film 1143, and improve the structural strength of the reflective film 128. At the same time, the structural bonding force between the silicon dioxide layer and the aluminum oxide layer, and between the aluminum oxide layers is stronger than the bonding force between the silicon dioxide layer and the aluminum film 1143. The combination of the silicon dioxide layer and the aluminum oxide layer can make the bonding between the silicon dioxide layer, the aluminum oxide layer and the aluminum film 1143 tighter, which is conducive to improving the structural strength, performance stability and service life of the reflective film 128. In addition, the silicon dioxide layer of the first protective film 1142 is adjacent to the titanium dioxide layer in the first anti-reflection film 1141, and the cooperation between the silicon dioxide layer and the titanium dioxide layer can also further improve the reflectivity of the reflective film 128, thereby improving the utilization efficiency of light. In some embodiments, the three-layer structure of the aluminum oxide layer, the aluminum film 1143, and the aluminum oxide layer can be formed by oxidizing both sides of the aluminum material, the unoxidized portion in the center of the aluminum material forms the aluminum film 1143, and the oxidized portions on both sides of the aluminum material form the aluminum oxide layer. By providing the aluminum oxide layer on the aluminum film 1143 through this process, the structural strength of the aluminum oxide layer and the aluminum film 1143 can be further improved.

[0072] In some embodiments, the thickness of the silicon dioxide layer in the first protective film 1142 is less than the thickness of the silicon dioxide layer in the first anti-reflection film 1141. The silicon dioxide layer in the first protective film 1142 takes into account both the effect of protecting the aluminum oxide layer and improving the reflectivity, while the first anti-reflection film 1141 cooperates with the titanium dioxide layer to achieve a stronger effect of improving the reflectivity. The thickness of the silicon dioxide layer in the first anti-reflection film 1141 is greater than the thickness of the silicon dioxide layer in the first protective film 1142, which can not only improve the effect of enhancing reflection of the first anti-reflection film 1141, but also ensure that the thickness of the silicon dioxide layer in the first protective film 1142 is not too large while taking into account the effects of protection and improving the reflectivity, which is conducive to compressing the thickness of the reflective film 128. In some embodiments, the thickness of the silicon dioxide layer in the second protective film 1144 is less than the thickness of the silicon dioxide layer in the first protective film 1142, so that the second protective film 1144 provides sufficient protection for the aluminum film 1143 while not being too large in size, which is conducive to further compressing the thickness of the reflective film 128.

[0073] In some embodiments, the refractive index of the body 1231 is greater than or equal to 1.5 and less than or equal to 2. The reasonable configuration of the refractive index of the body 1231 can form a good match with the reflective film 128, and the reflectivity of the light from the body 1231 to the reflective film 128 is improved by reasonably configuring the difference in the refractive indexes of the body 1231 and the reflective film 128. Figure 3 In the corresponding embodiment, the refractive index of the main body 1231 may be 1.52, and the material of the main body 1231 may be H-K9L glass.

[0074] Combination Figure 7 and Figure 8 As shown, Figure 8 1 is a reflectivity curve diagram of the reflective film 128 in the embodiment corresponding to Table 1, wherein the horizontal axis represents the wavelength, the vertical axis represents the reflectivity, and the three different curves represent the three cases where the incident angles of the light on the reflective film 128 are 10°, 30° and 50° respectively. Figure 8 It can be seen that the maximum reflectivity of the reflective film 128 in the wavelength range of 400nm-700nm and the incident angle of 10° is 95.9% (at 550nm), and the average reflectivity is 94.35%. The maximum reflectivity at the incident angle of 50° is 92.6% (at 435nm), and the average reflectivity is 89.8%, which can effectively improve the light utilization efficiency of the shooting module 12. In addition, the reflectivity change of the reflective film 128 at an incident angle of 10°-50° is less than 5%, the reflective performance is stable, and the quality of the reflected light is high. In some embodiments, at a reference wavelength of 550nm, the refractive index of the silicon dioxide layer is 1.46, the refractive index of the titanium dioxide layer is 2.45, and the refractive index of the aluminum oxide layer is 1.67.

[0075] In some embodiments, the thickness of the aluminum film 1143 is greater than or equal to 80 nm and less than or equal to 120 nm, which can ensure that the aluminum film 1143 has sufficient thickness to reflect light and improve the reflectivity of the reflective film 128, and is also conducive to reducing the thickness of the aluminum film 1143, thereby reducing the thickness of the reflective film 128. In some examples, the thickness of the silicon dioxide layer is greater than or equal to 12 nm and less than or equal to 200 nm, and the thickness of the titanium dioxide layer is greater than or equal to 6 nm and less than or equal to 150 nm, so that the thickness of the silicon dioxide layer and the titanium dioxide layer will not be too small, which is conducive to adapting to the preparation process of the silicon dioxide layer and the titanium dioxide layer. In addition, while the silicon dioxide layer and the titanium dioxide layer are made thick enough to improve the reflectivity, the thickness of the silicon dioxide layer and the titanium dioxide layer is also made not too large, which is conducive to reducing the thickness of the reflective film 128.

[0076] Combined with the following Table 2 and Fig. 9 As shown in Table 2 and Fig. 9 Corresponding to the reflective film 128 in other embodiments. In the embodiment corresponding to Table 2, the refractive index of the main body 1231 can be 1.62, and the material of the main body 1231 can be H-BAF6 glass, so that the main body 1231 can form a good match with the reflective film 128, and the reflectivity of the light from the main body 1231 to the reflective film 128 is improved by reasonably configuring the refractive index difference between the main body 1231 and the reflective film 128.

[0077] Table 2

[0078]

[0079] In Table 2 and Fig. 9 In the corresponding embodiment, the first protective film 1142 does not have a silicon dioxide layer, and the thickness of the aluminum oxide layer in the first protective film 1142 can be greater than the thickness of the aluminum oxide layer in the second protective film 1144, which can not only improve the bonding strength between the first anti-reflection film 1141 and the aluminum film 1143, improve the structural strength of the reflective film 128, but also cooperate with the first anti-reflection film 1141 to improve the reflectivity. Fig. 9 and Fig.10 As shown in Table 2 and Fig. 9In the corresponding embodiment, the thickness of the reflective film 128 is 376.07nm, and the PV increase value is less than 0.05λ. While improving the reflectivity, it has the effects of small thickness, high flatness, and good quality of reflected light. The maximum reflectivity of the reflective film 128 in the wavelength range of 400nm-70nm and the incident angle of 10° is 95.5% (at 501nm), and the average reflectivity is 93.8%. The maximum reflectivity at the incident angle of 50° is 92.7% (at 435nm), and the average reflectivity is 90%. Therefore, the reflective film 128 can effectively improve the reflectivity, thereby improving the light utilization efficiency of the shooting module 12. In addition, the reflectivity change of the reflective film 128 at an incident angle of 10°-50° is less than 5%, the reflection performance is stable, and the quality of the reflected light is high.

[0080] Combination Figure 2 , Fig.11 As shown in Table 3 below, in some other embodiments, the reflective film 128 further includes a second anti-reflective film 1145 disposed on the side of the second protective film 1144 facing away from the aluminum film 1143, and the second anti-reflective film 1145 includes a silicon dioxide layer and a titanium dioxide layer disposed on the side of the silicon dioxide layer facing the second protective film 1144. The second anti-reflective film 1145 is disposed on the side of the second protective film 1144 facing away from the aluminum film 1143, and the titanium dioxide layer and the silicon dioxide layer in the second anti-reflective film 1145 cooperate to improve the reflectivity of the reflective film 128 to the light incident on the reflective film 128 from the side of the reflective film 128 facing away from the main body 1231. It is understandable that when the reflective film 128 is disposed on the main body 1231 to form a reflective assembly, it is usually necessary to detect the light reflected by the reflective film 128 to obtain parameters such as the reflectivity of the reflective film 128. However, when the detection is affected by factors such as impurities in the main body 1231, it is easy to cause inaccurate detection results of the reflective film 128. Fig.11 In the illustrated embodiment, a second anti-reflection film 1145 is provided on the side of the reflective film 128 facing away from the main body 1231, so as to enhance the reflective film 128's ability to respond to light incident on the reflective film 128 from the side of the reflective film 128 facing away from the main body 1231 (for example, from the air). Thus, the light reflected by the side of the reflective film 128 facing away from the main body 1231 can be detected to obtain parameters of the reflective film 128, thereby avoiding the influence of factors such as impurities in the main body 1231 on the detection result, thereby improving the accuracy of the detection.

[0081] Table 3

[0082]

[0083] In the embodiment corresponding to Table 3, the refractive index of the main body 1231 can also be 1.52, and the material of the main body 1231 can be H-K9L glass, so that the main body 1231 can form a good match with the reflective film 128, and the reflectivity of the light emitted from the main body 1231 to the reflective film 128 can be improved by reasonably configuring the refractive index difference between the main body 1231 and the reflective film 128.

[0084] In some embodiments, a plurality of first anti-reflection films 1141 are provided, and the plurality of first anti-reflection films 1141 are sequentially stacked and arranged on the side of the first protective film 1142 facing away from the aluminum film 1143, and each first anti-reflection film 1141 may include a silicon dioxide layer and a titanium dioxide layer. It can be understood that the more the number of first anti-reflection films 1141, the higher the reflectivity of the reflective film 128. The specific number of first anti-reflection films 1141 is not limited. For example, when it is necessary to improve the reflectivity of the reflective film 128, the number of first anti-reflection films 1141 can be increased. When it is necessary to reduce the thickness of the reflective film 128 while improving the reflectivity, the number of first anti-reflection films 1141 can be reduced. Similarly, when a second anti-reflection film 1145 is provided on the side of the second protective film 1144 facing away from the aluminum film 1143, a plurality of second anti-reflection films 1145 may also be provided to improve the reflectivity of the reflective film 128, so as to facilitate the detection of the parameters of the reflective film 128 from the side of the reflective film 128 facing away from the main body 1231.

[0085] Combination Figure 2 and Fig.12 As shown, in some embodiments, the reflective film 128 includes a first anti-reflection film 1151, a silver film 1154 and an aluminum film 1155 which are arranged in sequence, the first anti-reflection film 1151 includes a silicon dioxide layer 1152 and a titanium dioxide layer 1153 arranged on the side of the silicon dioxide layer 1152 facing the silver film 1154, and the silicon dioxide layer 1152 and the titanium dioxide layer 1153 in the first anti-reflection film 1151 are adjacent to and attached to each other.

[0086] The above-mentioned reflective film 128 is provided with an aluminum film 1155 to play a major reflective role. At the same time, the silver film 1154 is provided to cooperate with the aluminum film 1155, which can further improve the reflectivity of the reflective film 128 to light. The titanium dioxide layer 1153 and the aluminum oxide layer in the first anti-reflective film 1151 of the reflective film 128 cooperate with each other, which can also effectively improve the reflectivity of the reflective film 128 to light. The cooperation of the first anti-reflective film 1151, the silver film 1154 and the aluminum film 1155 enables the reflective film 128 to reflect more light when it plays a reflective role in the light path. For example, when the reflective film 128 is provided on the first reflective surface 1232 and the second reflective surface 1233, the first reflective surface 1232 and the second reflective surface 1233 can reflect more light, which is beneficial to improving the light utilization efficiency and aperture of the shooting module 12, reducing the loss of light on the reflective film 128, and thus improving the shooting quality of the shooting module 12. In addition, the silicon dioxide layer 1152 in the first anti-reflection film 1151 can provide protection for the titanium dioxide layer 1153 , which is beneficial to improving the performance stability and structural strength of the reflective film 128 .

[0087] The layer structure of the reflective film 128 and the thickness of each layer structure in some embodiments are given in Table 4 below. The reflective film 128 shown in Table 4 corresponds to Fig.12 The reflective film 128 in the embodiment shown. It can be seen from Table 4 that when the reflective film 128 is disposed on the main body 1231, the first anti-reflective film 1151 is disposed close to the main body 1231, the medium on one side of the reflective film 128 is the main body 1231, and the medium on the side of the reflective film 128 facing away from the main body 1231 can be air.

[0088] Table 4

[0089]

[0090] Combining Table 4 and Fig.12As shown, in some embodiments, the reflective film 128 also includes a first oxide film 1146 disposed between the first anti-reflection film 1151 and the silver film 1154, a second oxide film 1147 disposed between the silver film 1154 and the aluminum film 1155, and a third oxide film 1148 disposed on the side of the aluminum film 1155 facing away from the silver film 1154. The materials of the first oxide film 1146, the second oxide film 1147 and the third oxide film 1148 include but are not limited to one or more metal oxides, such as aluminum oxide (Al2O3). Oxide films are disposed on both sides of the silver film 1154 and both sides of the aluminum film 1155, and the oxide films can protect the silver film 1154 and the aluminum film 1155 from being oxidized by air and affecting the reflectivity, thereby improving the performance stability of the reflective film 128. It can be understood that when the material of the second oxide film 1147 and the third oxide film 1148 is aluminum oxide, in some embodiments, the three-layer structure of the second oxide film 1147, the aluminum film 1155, and the third oxide film 1148 can be formed by oxidizing both sides of the aluminum material, and the unoxidized portion in the center of the aluminum material forms the aluminum film 1155, and the oxidized portions on both sides of the aluminum material form the second oxide film 1147 and the third oxide film 1148, respectively. By setting the second oxide film 1147 and the third oxide film 1148 on the aluminum film 1155 through this process, the bonding strength between the second oxide film 1147, the third oxide film 1148 and the aluminum film 1155 can be improved, thereby improving the performance stability and structural strength of the reflective film 128.

[0091] Further, in some embodiments, the reflective film 128 further includes a first protective film 1149 disposed between the first anti-reflective film 1151 and the first oxide film 1146, and a second protective film 1161 disposed on the side of the third oxide film 1148 facing away from the aluminum film 1155. The materials of the first oxide film 1146 and the third oxide film 1148 are both aluminum oxide, and the materials of the first protective film 1149 and the second protective film 1161 are both silicon dioxide. The first oxide film 1146 and the first protective film 1149 are attached to each other, and the third oxide film 1148 and the second protective film 1161 are attached to each other. The film layer structure of silicon dioxide and the film layer structure of aluminum oxide have good bonding strength. The first protective film 1149 is disposed between the first anti-reflective film 1151 and the first oxide film 1146, which is conducive to improving the bonding strength between the first anti-reflective film 1151 and the first oxide film 1146 through the first protective film 1149, thereby improving the structural strength of the reflective film 128. In addition, the first protective film 1149 includes a silicon dioxide layer, which can also be alternately matched with the titanium dioxide layer 1153 to further improve the reflectivity of the reflective film 128. The second protective film 1161, the aluminum film 1155 and the third oxide film 1148 are arranged to form a three-layer structure of aluminum-aluminum oxide-silicon dioxide, which is beneficial to improving the bonding strength between two adjacent layers, thereby also helping to improve the structural strength of the reflective film 128.

[0092] Refer to Table 4 and Fig.12 In some embodiments, when the materials of the first protective film 1149 and the second protective film 1161 both include silicon dioxide, the thickness of the second protective film 1161 is greater than the thickness of the first protective film 1149 and less than the thickness of the silicon dioxide layer 1152 in the first anti-reflection film 1151. In this way, the silicon dioxide layer 1152 has sufficient thickness to cooperate with the titanium dioxide layer 1153 to improve the reflectivity of the reflective film 128, and can also protect the titanium dioxide layer 1153 and improve the structural strength of the reflective film 128. The first protective film 1149 can have a sufficiently small size while protecting the first oxide film 1146 and improving the bonding strength with the first oxide film 1146, which is conducive to reducing the thickness of the reflective film 128. In addition, the second protective film 1161 has sufficient strength to protect the third oxide film 1148 and improve the structural strength of the reflective film 128, and the thickness is not too large, which is conducive to reducing the thickness of the reflective film 128.

[0093] In some embodiments, the refractive index of the body 1231 is greater than or equal to 1.5 and less than or equal to 2. The reasonable configuration of the refractive index of the body 1231 can form a good match with the reflective film 128, and the reflectivity of the light from the body 1231 to the reflective film 128 can be improved by reasonably configuring the difference in the refractive indexes of the body 1231 and the reflective film 128. Fig.12 In the corresponding embodiment, the refractive index of the main body 1231 may be 1.52, and the material of the main body 1231 may be H-K9L glass.

[0094] Combination Fig.12 and Fig.13 As shown, Fig.13 For Table 4 and Fig.12 The reflectivity curve of the reflective film 128 in the corresponding embodiment, wherein the horizontal axis represents the wavelength, the vertical axis represents the reflectivity, and the three different curves represent the three cases where the incident angles of the light on the reflective film 128 are 10°, 30° and 50° respectively. Fig.13It can be seen that the total thickness of the reflective film 128 is 389.2nm, and the increase in optical surface flatness (PV) is less than 0.05λ. While improving the reflectivity, it has the effects of small thickness, high flatness, and good quality of reflected light. The reflective film 128 has a maximum reflectivity of 98% (at 509nm) and an average reflectivity of 97.3% in the wavelength range of 400nm-700nm and an incident angle of 10°. The maximum reflectivity of the reflective film 128 is 96.7% (at 435nm) and an average reflectivity of 96% in the wavelength range of 400nm-700nm and an incident angle of 50°, which can effectively improve the light utilization efficiency of the shooting module 12. In addition, the reflectivity change of the reflective film 128 at an incident angle of 10°-50° is less than 2%, the reflection performance is stable, and the quality of the reflected light is high. In some embodiments, at a reference wavelength of 550 nm, the refractive index of the silicon dioxide layer 1152, the first protective film 1149 and the second protective film 1161 is 1.46, the refractive index of the titanium dioxide layer 1153 is 2.45, and the refractive index of the first oxide film 1146, the second oxide film 1147 and the third oxide film 1148 is 1.67.

[0095] In some embodiments, the thickness of the aluminum film 1155 is greater than or equal to 80 nm and less than or equal to 120 nm, and the thickness of the silver film 1154 is greater than or equal to 10 nm and less than or equal to 50 nm. In this way, the aluminum film 1155 and the silver film 1154 can have sufficient thickness to reflect light and improve the reflectivity of the reflective film 128, while also helping to reduce the thickness of the aluminum film 1155 and the silver film 1154, thereby reducing the thickness of the reflective film 128. In some examples, the thickness of the silicon dioxide layer 1152 is greater than or equal to 12 nm and less than or equal to 200 nm, and the thickness of the titanium dioxide layer 1153 is greater than or equal to 6 nm and less than or equal to 150 nm. Therefore, the thickness of the silicon dioxide layer 1152 and the titanium dioxide layer 1153 will not be too small, which is conducive to adapting to the preparation process of the silicon dioxide layer 1152 and the titanium dioxide layer 1153. In addition, while the silicon dioxide layer 1152 and the titanium dioxide layer 1153 have sufficient thickness to improve the reflectivity, the thickness of the silicon dioxide layer 1152 and the titanium dioxide layer 1153 will not be too large, which is conducive to reducing the thickness of the reflective film 128. In some embodiments, the thickness of the first protective film 1149 and the second protective film 1161 can also be 12 nm-200 nm, which can be specifically designed according to the requirements of reflectivity and thickness, and will not be repeated here.

[0096] Combined with the following Table 5 and Fig.14 As shown in Table 5 and Fig.14 Corresponding to the reflective film 128 in other embodiments. Fig.14In the corresponding embodiment, the refractive index of the main body 1231 can be 1.62, and the material of the main body 1231 can be H-BAF6 glass, so that the main body 1231 can form a good match with the reflective film 128, and the reflectivity of the light from the main body 1231 to the reflective film 128 can be improved by reasonably configuring the refractive index difference between the main body 1231 and the reflective film 128.

[0097] Table 5

[0098]

[0099] In Table 5 and Fig.14 In the corresponding embodiment, the first protective film 1149 can be omitted, and the thickness of the first oxide film 1146 can be greater than the thickness of the second oxide film 1147 and the third oxide film 1148, which can not only improve the bonding strength between the first anti-reflection film 1151 and the first oxide film 1146, improve the structural strength of the reflective film 128, but also make the first oxide film 1146 thick enough to cooperate with the first anti-reflection film 1151 to improve the reflectivity. Fig.14 and Fig.15 As shown in Table 5 and Fig.14 In the corresponding embodiment, the thickness of the reflective film 128 is 340.84nm, and the PV increase value is less than 0.05λ. While improving the reflectivity, it has the effects of small thickness, high flatness, and good quality of reflected light. The maximum reflectivity of the reflective film 128 in the wavelength range of 400nm-70nm and the incident angle of 10° is 97.6% (at 505nm), and the average reflectivity is 96.7%. The maximum reflectivity in the wavelength range of 400nm-70nm and the incident angle of 50° is 96.2% (at 500nm), and the average reflectivity is 95.2%. Therefore, the reflective film 128 can effectively improve the reflectivity, thereby improving the light utilization efficiency of the shooting module 12. In addition, the reflectivity change of the reflective film 128 at an incident angle of 10°-50° is less than 2%, the reflection performance is stable, and the quality of the reflected light is high.

[0100] Furthermore, in some embodiments, the reflective film 128 further includes a second anti-reflective film (not shown) disposed on the side of the aluminum film 1155 facing away from the silver film 1154, and the second anti-reflective film may include a silicon dioxide sublayer and a titanium dioxide sublayer disposed on the side of the silicon dioxide sublayer facing the aluminum film 1155. The second anti-reflective film is disposed on the side of the aluminum film 1155 facing away from the silver film 1154. Similar to the first anti-reflective film 1151, the titanium dioxide sublayer and the silicon dioxide sublayer in the second anti-reflective film cooperate to improve the reflectivity of the reflective film 128 to the light incident on the reflective film 128 from the side of the reflective film 128 facing away from the main body 1231.

[0101] It is understandable that when the reflective film 128 is disposed on the main body 1231 to form a reflective assembly with the main body 1231, it is usually necessary to detect the light reflected by the reflective film 128 to obtain the reflectivity and other parameters of the reflective film 128. However, when detecting the reflected light that passes through the main body 1231 and is emitted from the main body 1231 after being reflected by the reflective film 128, due to the influence of factors such as impurities in the main body 1231, it is easy to cause inaccurate detection results of the reflective film 128. Therefore, in some embodiments, a second anti-reflection film is disposed on the side of the reflective film 128 facing away from the main body 1231, which can improve the reflectivity of the reflective film 128 to the light emitted from the side of the reflective film 128 facing away from the main body 1231 (for example, from the air) to the reflective film 128, so that the light reflected by the side of the reflective film 128 facing away from the main body 1231 can be detected to obtain the parameters of the reflective film 128, which can avoid the influence of factors such as impurities in the main body 1231 on the detection results, and improve the accuracy of the detection. It should be noted that when the reflective film 128 is provided with a second protective film 1161 made of silicon dioxide, the second anti-reflective film can be provided on the side of the second protective film 1161 facing away from the aluminum film 1155. The titanium dioxide sublayer in the second anti-reflective film and the second protective film 1161 are attached to each other, and can also cooperate with each other to enhance the reflectivity of the reflective film 128 to the light incident on the side of the reflective film 128 facing away from the main body 1231.

[0102] In some embodiments, a plurality of first anti-reflection films 1151 are provided, and the plurality of first anti-reflection films 1151 are sequentially stacked on the side of the first protective film 1149 facing away from the silver film 1154, and each first anti-reflection film 1151 may include a silicon dioxide layer 1152 and a titanium dioxide layer 1153. It can be understood that the more the number of first anti-reflection films 1151 is, the higher the reflectivity of the reflective film 128 is. The specific number of first anti-reflection films 1151 is not limited. For example, when it is necessary to improve the reflectivity of the reflective film 128, the number of first anti-reflection films 1151 can be increased, and an alternating structure of a plurality of silicon dioxide layers 1152 and titanium dioxide layers 1153 is formed between the plurality of first anti-reflection films 1151, which can effectively improve the reflectivity. When it is necessary to reduce the thickness of the reflective film 128 while improving the reflectivity, the number of first anti-reflection films 1151 can be reduced. Similarly, when a second anti-reflection film is provided on the side of the second protective film 1161 facing away from the aluminum film 1155 , multiple second anti-reflection films may be provided to improve the reflectivity of the reflective film 128 , so as to facilitate detection of parameters of the reflective film 128 from the side of the reflective film 128 facing away from the main body 1231 .

[0103] Combination Figure 2 and Fig.16As shown, in some embodiments, the second light absorbing film 1245 includes a first titanium film layer 1162 and two anti-reflection film layers 1171. The two anti-reflection film layers 1171 are respectively arranged on both sides of the first titanium film layer 1162. Each anti-reflection film layer 1171 includes a titanium dioxide layer 1166 and a silicon dioxide layer 1167. The titanium dioxide layer 1166 and the silicon dioxide layer 1167 in each anti-reflection film layer 1171 are adjacent and attached to each other.

[0104] The above-mentioned second light absorbing film 1245 is provided with the first titanium film layer 1162 which plays a major light absorbing role and can effectively reduce the transmittance and reflectivity of the second light absorbing film 1245. Anti-reflection film layers 1171 are respectively provided on both sides of the first titanium film layer 1162. The titanium dioxide layer 1166 and the silicon dioxide layer 1167 adjacently provided in the anti-reflection film layer 1171 can effectively reduce the reflectivity of the second light absorbing film 1245. Therefore, when the second light absorbing film 1245 is used as a shading element in the light path, it can effectively absorb light and reduce the reflection of light on the second light absorbing film 1245, thereby reducing stray light and interference light in the light path, reducing glare, halo and other phenomena in the light path imaging, and improving the imaging quality of the light passing through the second light absorbing film 1245. In addition, the use of the first titanium film layer 1162 in conjunction with the anti-reflection film layer 1171 can improve the shading effect and, compared with the traditional use of an ink layer as a shading element, can also significantly reduce the thickness of the second light absorbing film 1245. When the second light absorbing film 1245 is adhered to the first sub-prism 1241 and the second sub-prism 1242 through optical glue, it is helpful to avoid the phenomenon of excessive height difference between the second light absorbing film 1245 and the non-second light absorbing film 1245 area due to the optical glue, thereby helping to avoid problems such as bubbles or uneven distribution of the optical glue that affect the imaging quality.

[0105] Table 6 below shows the layer structure of the second light absorbing film 1245 and the thickness of each layer structure in some embodiments. When the second light absorbing film 1245 is disposed between the first sub-prism 1241 and the second sub-prism 1242, the media on both sides of the second light absorbing film 1245 can be the first sub-prism 1241 and the second sub-prism 1242 respectively. The light from the lens 111 is incident on the first sub-prism 1241, and is incident on the second sub-prism 1242 through the second light absorbing film 1245 from between the first sub-prism 1241 and the second sub-prism 1242. It can be seen from Table 6 that the total thickness of the second light absorbing film 1245 is 774.48 nm, which is much smaller than the thickness of the ink layer as a light shielding element, and can effectively reduce the height difference between the optical glue between the first sub-prism 1241 and the second sub-prism 1242 in the second light absorbing film 1245 and the non-second light absorbing film 1245 area, thereby avoiding the situation where the optical glue generates bubbles or has uneven thickness and affects the imaging quality.

[0106] Table 6

[0107]

[0108] Combination Fig.16 As shown in Table 6, in some embodiments, the second light absorbing film 1245 further includes two first protective film layers 1164, which are respectively arranged on both sides of the first titanium film layer 1162, and are both located between the first titanium film layer 1162 and the anti-reflection film layer 1171. The two first protective film layers 1164 can protect the first titanium film layer 1162, prevent the first titanium film layer 1162 from being oxidized and affecting the reflectivity, thereby improving the performance stability and service life of the second light absorbing film 1245. In some embodiments, the material of the first protective film layer 1164 can be metal oxide, which has good anti-oxidation performance and can effectively prevent the first titanium film layer 1162 from being oxidized. For example, in some embodiments, the material of the first protective film layer 1164 can be silicon dioxide, which can not only provide effective protection for the first titanium film layer 1162, but also can be closely combined with the first titanium film layer 1162, thereby improving the structural stability and service life of the second light absorbing film 1245.

[0109] In some embodiments, the second light absorbing film 1245 further includes two second titanium film layers 1163, which are respectively disposed on both sides of the first titanium film layer 1162 and are both disposed between the first protective film layer 1164 and the anti-reflection film layer 1171. The second titanium film layer 1163 is arranged to cooperate with the first titanium film layer 1162 to effectively improve the reflectivity and transmittance of the second light absorbing film 1245, and the second titanium film layer 1163 and the first protective film layer 1164 are adjacent to and attached to each other, so that the second titanium film layer 1163 cooperates with the silicon dioxide of the first protective film layer 1164, which can effectively reduce the reflectivity of the second light absorbing film 1245, thereby effectively reducing the stray light in the shooting module 12.

[0110] In some embodiments, the thickness of the second titanium film layer 1163 is less than that of the first titanium film layer 1162, so that the second titanium film layer 1163 can effectively reduce the reflectivity of the second light absorbing film 1245 while also reducing the thickness of the second light absorbing film 1245, which is beneficial to reducing the occupied space of the shooting module 12, and further avoiding the risk of bubbles generated by the optical glue between the first sub-prism 1241 and the second sub-prism 1242 due to the height difference, thereby improving the imaging quality of the shooting module 12.

[0111] In some embodiments, the second light absorbing film 1245 further includes two second protective film layers 1165, which are respectively disposed on both sides of the first titanium film layer 1162 and are both disposed between the anti-reflection film layer 1171 and the second titanium film layer 1163. The material of the second protective film layer 1165 can also be a metal oxide, such as silicon dioxide, and the second protective film layer 1165 is adjacent to and attached to the titanium dioxide layer 1166 and the second titanium film layer 1163. The second protective film layer 1165 can provide protection for the second titanium film layer 1163, prevent the second titanium film layer 1163 from being oxidized, and is conducive to improving the light shielding effect, performance stability and service life of the second light absorbing film 1245. At the same time, the design of the silicon dioxide in the second protective film layer 1165 and the titanium dioxide layer 1166 in the anti-reflection film layer 1171 fitting each other enables the titanium dioxide layer 1166 to cooperate with the second protective film layer 1165 to further enhance the anti-reflection effect of the second light-absorbing film 1245, which is beneficial to reduce stray light in the shooting module 12 and improve imaging quality.

[0112] Further, in some embodiments, the thickness of the silicon dioxide layer 1167 is greater than the thickness of the first protective film layer 1164, and the thickness of the first protective film layer 1164 is greater than the thickness of the second protective film layer 1165. Thus, the first protective film layer 1164 has sufficient thickness to form a good match with the first titanium film layer 1162 and the second titanium film layer 1163, thereby effectively reducing the reflectivity and transmittance of the second light absorbing film 1245 and improving the light shielding effect. The larger thickness of the first protective film layer 1164 can also make the light reasonably transition between the first titanium film layer 1162 and the second titanium film layer 1163, which is conducive to improving the stability of the reflectivity and transmittance of the second light absorbing film 1245 to light of different wavelengths, thereby improving the performance stability of the second light absorbing film 1245 to light of different spectra. While the second protective film layer 1165 effectively protects the second titanium film layer 1163, the thickness will not be too large, which is conducive to reducing the thickness of the second light absorbing film 1245. In addition, the silicon dioxide layer 1167, as the outermost structure of the second light absorbing film 1245, has a sufficient thickness to protect the various layer structures within the second light absorbing film 1245 and improve the structural strength of the second light absorbing film 1245. At the same time, it can also make the light transition reasonably in the silicon dioxide layer 1167, which is beneficial to improving the stability of the reflectivity and transmittance of the second light absorbing film 1245 to light of different wavelength bands, thereby improving the performance stability of the second light absorbing film 1245 to light of different spectra.

[0113] In some embodiments, the thickness of the first titanium film layer 1162 is greater than or equal to 100 nm and less than or equal to 200 nm, for example, it can be 150 nm. The first titanium film layer 1162 has sufficient thickness to absorb light, thereby improving the light absorption capacity of the second light absorption film 1245, so that the second light absorption film 1245 can effectively absorb stray light and improve the imaging quality of the camera module 12. In some embodiments, the thickness of the silicon dioxide layer 1167 is greater than or equal to 50 nm and less than or equal to 200 nm, for example, it can be 177.71 nm, which is conducive to improving the structural strength of the second light absorption film 1245 and the performance stability of the second light absorption film 1245 to different spectral lights. When the material of the first protective film layer 1164 and the second protective film layer 1165 is the silicon dioxide layer 1167, the thickness of the first protective film layer 1164 and the second protective film layer 1165 can be greater than or equal to 12nm and less than or equal to 200nm. In some embodiments, the thickness of the titanium dioxide layer 1166 is greater than or equal to 6nm and less than or equal to 150nm. The specific design can be based on the anti-reflection effect and structural strength of the second light-absorbing film 1245, which will not be repeated here.

[0114] In some embodiments, the refractive index of the first sub-prism 1241 and the second sub-prism 1242 of the conductive element 113 is greater than or equal to 1.5 and less than or equal to 2. The reasonable configuration of the refractive index of the conductive element 113 can form a good match with the second light absorbing film 1245. By reasonably configuring the difference in the refractive index of the conductive element 113 and the second light absorbing film 1245, it is also helpful to reduce the reflectivity and transmittance of the second light absorbing film 1245 to the light emitted from the conductive element 113 to the second light absorbing film 1245. In Tables 6 and Fig.16 In the corresponding embodiment, the refractive index of the conductive element 113 may be 1.62, and the material of the conductive element 113 may be H-BAF6 glass.

[0115] Combination Fig.16 , Fig.17 and Fig.18 As shown, Fig.17 : is a reflectivity curve diagram of the second light absorption film 1245 in some embodiments, where the horizontal axis is the wavelength and the vertical axis is the reflectivity. Fig.18 FIG. 1 is a graph showing the optical density value of the second light absorbing film 1245 in some embodiments, wherein the horizontal axis is the wavelength and the vertical axis is the OD value. Fig.17 and Fig.18It can be known that the maximum reflectivity of the second light absorbing film 1245 for light with a wavelength of 400nm-700nm is 0.14% (at 400nm), and the average reflectivity is 0.05%. The reflectivity of the second light absorbing film 1245 for light is low enough to effectively absorb light and reduce the reflection of light on the second light absorbing film 1245, thereby effectively reducing the stray light component in the shooting module 12 and improving the imaging quality. At the same time, the maximum OD value of the second light absorbing film 1245 for light with a wavelength of 400nm-700nm is 4.4 (at 414nm), and the average OD value is 4.3. The second light absorbing film 1245 has a sufficiently low light transmittance and can effectively absorb light, thereby effectively reducing the stray light in the shooting module 12, reducing the risk of glare and halo, and improving the imaging quality.

[0116] refer to Fig.19 , Fig.19 The electronic device 10 is a schematic diagram of the structure of the electronic device 10 provided in the embodiment of the present application. The electronic device 10 may include a radio frequency (RF) circuit 501, a memory 502 including one or more computer-readable storage media, an input unit 503, a display unit 504, a sensor 505, an audio circuit 506, a wireless fidelity (WiFi) module 507, a processor 508 including one or more processing cores, and a power supply 509. Those skilled in the art will understand that Fig.19 The structure of the electronic device 10 shown in the figure does not constitute a limitation on the electronic device 10, and the electronic device 10 may include more or less components than those shown in the figure, or combine certain components, or arrange the components differently.

[0117] The radio frequency circuit 501 can be used to send and receive information, or receive and send signals during a call. In particular, after receiving the downlink information of the base station, it is handed over to one or more processors 508 for processing; in addition, the data related to the uplink is sent to the base station. Usually, the radio frequency circuit 501 includes but is not limited to an antenna, at least one amplifier, a tuner, one or more oscillators, a subscriber identity module (SIM) card, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, etc. In addition, the radio frequency circuit 501 can also communicate with the network and other devices through wireless communication. The wireless communication can use any communication standard or protocol, including but not limited to the global system for mobile communications (GSM), the general packet radio service (GPRS), the code division multiple access (CDMA), the wideband code division multiple access (WCDMA), the long term evolution (LTE), email, the short message service (SMS), etc.

[0118] The memory 502 can be used to store applications and data. The applications stored in the memory 502 contain executable codes. The applications can be composed of various functional modules. The processor 508 executes various functional applications and data processing by running the applications stored in the memory 502. The memory 502 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the electronic device 10 (such as audio data, a phone book, etc.), etc. In addition, the memory 502 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 502 can also include a memory controller to provide the processor 508 and the input unit 503 with access to the memory 502.

[0119] The input unit 503 can be used to receive input digital, character information or user feature information (such as fingerprints), and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control. Specifically, in a specific embodiment, the input unit 503 may include a touch-sensitive surface and other input devices. The touch-sensitive surface, also known as a touch display screen or a touch pad, can collect user touch operations on or near it (such as operations performed by users using fingers, styluses, or any other suitable objects or accessories on or near the touch-sensitive surface), and drive corresponding connection devices according to a pre-set program. Optionally, the touch-sensitive surface may include a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into touch point coordinates, and then sends it to the processor 508, and can receive and execute commands sent by the processor 508.

[0120] The display unit 504 can be used to display information input by the user or information provided to the user and various graphical user interfaces of the electronic device 10, which can be composed of graphics, text, icons, videos and any combination thereof. The display unit 504 may include a display panel. Optionally, the display panel can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like. Furthermore, the touch-sensitive surface may cover the display panel, and when the touch-sensitive surface detects a touch operation on or near it, it is transmitted to the processor 508 to determine the type of touch event, and then the processor 508 provides a corresponding visual output on the display panel according to the type of touch event. Although in Fig.19 In the embodiment, the touch sensitive surface and the display panel are used as two independent components to implement input and output functions, but in some embodiments, the touch sensitive surface and the display panel can be integrated to implement input and output functions. It can be understood that the display screen 110 can include an input unit 503 and a display unit 504.

[0121] The electronic device 10 may also include at least one sensor 505, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel according to the brightness of the ambient light, and the proximity sensor may turn off the display panel and / or backlight when the electronic device 10 is moved to the ear. As a type of motion sensor, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that identify the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors that the electronic device 10 can also be configured with, such as gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be repeated here.

[0122] The audio circuit 506 can provide an audio interface between the user and the electronic device 10 through a speaker and a microphone. The audio circuit 506 can convert the received audio data into an electrical signal, transmit it to the speaker, and convert it into a sound signal for output; on the other hand, the microphone converts the collected sound signal into an electrical signal, which is received by the audio circuit 506 and converted into audio data, and then the audio data is output to the processor 508 for processing, and then sent to another electronic device 10 through the radio frequency circuit 501, or the audio data is output to the memory 502 for further processing. The audio circuit 506 may also include an earphone socket to provide communication between an external earphone and the electronic device 10.

[0123] Wireless Fidelity (WiFi) is a short-range wireless transmission technology. The electronic device 10 can help users send and receive emails, browse web pages, and access streaming media through the wireless fidelity module 507, which provides users with wireless broadband Internet access. Fig.19 The wireless fidelity module 507 is shown, but it is understandable that it is not a necessary component of the electronic device 10 and can be omitted as needed without changing the essence of the invention.

[0124] The processor 508 is the control center of the electronic device 10. It uses various interfaces and lines to connect various parts of the entire electronic device 10. By running or executing applications stored in the memory 502 and calling data stored in the memory 502, it executes various functions of the electronic device 10 and processes data, thereby monitoring the electronic device 10 as a whole. Optionally, the processor 508 may include one or more processing cores; preferably, the processor 508 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 508.

[0125] The electronic device 10 also includes a power supply 509 for supplying power to various components. Preferably, the power supply 509 can be logically connected to the processor 508 through a power management system, so that the power management system can manage charging, discharging, and power consumption. The power supply 509 can also include one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0126] although Fig.19 Not shown, the electronic device 10 may also include a Bluetooth module, etc., which will not be described in detail here. In specific implementation, the above modules can be implemented as independent entities, or can be arbitrarily combined and implemented as the same or several entities. The specific implementation of the above modules can refer to the previous method embodiment, which will not be described in detail here.

[0127] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0128] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An optical transmission element, characterized in that: The main body of the optical transmission element has a light-transmitting surface, a first reflecting surface, and a second reflecting surface. The light-transmitting surface has a light-entering area and a light-exiting area. The first reflecting surface is inclined to the light-transmitting surface and is arranged corresponding to the light-entering area. The second reflecting surface is inclined to the light-transmitting surface and is arranged corresponding to the light-exiting area. The main body also has a bottom surface, which connects the first reflecting surface and the second reflecting surface and is arranged opposite to the light-transmitting surface. The optical transmission element is configured such that at least part of the light incident from the light-entering area to the first reflecting surface can be reflected from the first reflecting surface to the light-transmitting surface, and reflected from the light-transmitting surface to the second reflecting surface, and then reflected from the second reflecting surface and emitted from the light-exiting area. The first reflection surface is provided with a first reflection area, the second reflection surface is provided with a second reflection area, and the optical transmission element further includes a reflection film provided in the first reflection area and the second reflection area.

2. The optical transmission element according to claim 1, characterized in that The reflective film includes a first anti-reflection film, a first protective film, an aluminum film and a second protective film which are stacked in sequence. The first anti-reflection film includes a silicon dioxide layer and a titanium dioxide layer arranged on the silicon dioxide layer facing the first protective film. The first protective film and the second protective film both include an aluminum oxide layer attached to the aluminum film.

3. The optical transmission element according to claim 2, characterized in that The first protection film further includes a silicon dioxide layer disposed on the aluminum oxide layer and facing away from the aluminum film.

4. The optical transmission element according to claim 3, characterized in that The thickness of the silicon dioxide layer in the first protection film is smaller than the thickness of the silicon dioxide layer in the first anti-reflection film.

5. The optical transmission element according to claim 2, characterized in that The second protective film further includes a silicon dioxide layer attached to a side of the aluminum oxide layer facing away from the aluminum film.

6. The optical transmission element according to claim 2, characterized in that A plurality of the first anti-reflection films are provided, and the plurality of the first anti-reflection films are sequentially stacked and arranged on a side of the first protective film facing away from the aluminum film.

7. The optical transmission element according to claim 2, characterized in that The reflective film further includes a second anti-reflection film disposed on a side of the second protective film facing away from the aluminum film, and the second anti-reflection film includes a silicon dioxide layer and a titanium dioxide layer disposed on a side of the silicon dioxide layer facing the second protective film.

8. The optical transmission element according to claim 2, characterized in that The thickness of the aluminum film is 80nm-120nm, the thickness of the silicon dioxide layer is 12nm-200nm, and the thickness of the titanium dioxide layer is 6nm-150nm.

9. The optical transmission element according to claim 1, characterized in that: The reflective film includes a first anti-reflection film, a silver film and an aluminum film which are arranged in sequence. The first anti-reflection film includes a silicon dioxide layer and a titanium dioxide layer which is arranged on a side of the silicon dioxide layer facing the silver film.

10. The optical transmission element according to claim 9, characterized in that The reflective film also includes a first oxide film, a second oxide film and a third oxide film. The first oxide film is arranged between the first anti-reflection film and the silver film, the second oxide film is arranged between the silver film and the aluminum film, and the third oxide film is arranged on the side of the aluminum film facing away from the silver film.

11. The optical transmission element according to claim 10, characterized in that The first oxide film, the second oxide film and the third oxide film are all made of aluminum oxide.

12. The optical transmission element according to claim 11, characterized in that The reflective film further includes a first protective film disposed between the first anti-reflection film and the first oxide film. The material of the first protective film includes silicon dioxide. The first protective film and the first oxide film are attached to each other.

13. The optical transmission element according to claim 12, characterized in that The reflective film further includes a second protective film disposed on a side of the third oxide film facing away from the aluminum film. The second protective film is made of silicon dioxide, and the second protective film and the third oxide film are attached to each other.

14. The optical transmission element according to claim 13, characterized in that The thickness of the second protection film is greater than the thickness of the first protection film and less than the thickness of the silicon dioxide layer.

15. The optical transmission element according to claim 9, characterized in that The reflective film further comprises a second anti-reflection film disposed on the side of the aluminum film facing away from the silver film, and the second anti-reflection film comprises a titanium dioxide sublayer and a silicon dioxide sublayer disposed on the side of the titanium dioxide sublayer facing away from the aluminum film.

16. The optical transmission element according to claim 9, characterized in that A plurality of the first anti-reflection films are provided, and the plurality of the first anti-reflection films are sequentially stacked and arranged on a side of the first protective film facing away from the aluminum film.

17. The optical transmission element according to claim 9, characterized in that The thickness of the aluminum film is 80nm-120nm, the thickness of the silver film is 10nm-50nm, the thickness of the silicon dioxide layer is 12nm-200nm, and the thickness of the titanium dioxide layer is 6nm-150nm.

18. The optical transmission element according to claim 1, characterized in that The optical transmission element further includes a first light absorption film, and the first light absorption film is disposed on the bottom surface.

19. The optical transmission element according to claim 1, characterized in that The bottom surface is a diffuse reflection surface.

20. The optical transmission element according to claim 1, characterized in that The main body includes a first sub-prism and a second sub-prism, the first reflecting surface is arranged on the first sub-prism, and the second reflecting surface is arranged on the second sub-prism. The optical transmission element also includes a second light-absorbing film arranged at the junction of the first sub-prism and the second sub-prism, and the second light-absorbing film defines a light-clearing aperture between the first sub-prism and the second sub-prism.

21. The optical transmission element according to claim 20, characterized in that The projection of the second light absorbing film on the first sub-prism forms an opening facing the light transmitting surface.

22. The optical transmission element according to claim 21, characterized in that At least a portion of the edge of the second light absorbing film corresponding to the opening is configured as an arc-shaped edge.

23. The optical transmission element according to claim 22, characterized in that The edge of the second light absorbing film corresponding to the opening is set to be a periodically distributed arc edge, and the radius of each arc is 0.1mm-0.3mm.

24. The optical transmission element according to claim 20, characterized in that The second light-absorbing film includes a first titanium film layer and two anti-reflection film layers, the two anti-reflection film layers are respectively arranged on both sides of the first titanium film layer, the anti-reflection film layers include a titanium dioxide layer and a silicon dioxide layer, the silicon dioxide layer is arranged on the side of the titanium dioxide layer facing away from the first titanium film layer, and the titanium dioxide layer and the silicon dioxide layer in the anti-reflection film layers are attached to each other.

25. The optical transmission element according to claim 24, characterized in that The second light absorbing film further includes two first protective film layers, which are respectively arranged on both sides of the first titanium film layer and between the first titanium film layer and the anti-reflection film layer.

26. The optical transmission element according to claim 25, characterized in that The material of the first protective film layer includes silicon dioxide.

27. The optical transmission element according to claim 25, characterized in that The second light absorption film further includes two second titanium film layers, and the two second titanium film layers are respectively arranged between the two first protection film layers and the two anti-reflection film layers.

28. The optical transmission element according to claim 27, characterized in that The thickness of the second titanium film layer is smaller than the thickness of the first titanium film layer.

29. The optical transmission element according to claim 28, characterized in that The second light absorbing film also includes two second protective film layers, which are respectively arranged between the two anti-reflection film layers and the two second titanium film layers. The material of the second protective film layer includes silicon dioxide, and the second protective film layer is attached to the titanium dioxide layer and the second titanium film layer.

30. The optical transmission element according to claim 24, characterized in that The thickness of the first titanium film layer is 100nm-200nm, the thickness of the silicon dioxide layer is 50nm-200nm, and the thickness of the titanium dioxide layer is 6nm-150nm.

31. The optical transmission element according to claim 24, characterized in that The second light-absorbing film also includes two first protective film layers, two second titanium film layers and two second protective film layers, wherein one of the anti-reflection film layers, one of the second protective film layers, one of the second titanium film layers, one of the first protective film layers, the first titanium film layer, another first protective film layer, another second titanium film layer, another second protective film layer and another anti-reflection film layer are stacked in sequence, and the material of the first protective film layer includes silicon dioxide, and the material of the second protective film layer includes silicon dioxide.

32. The optical transmission element according to claim 31, characterized in that The thickness of the silicon dioxide layer is greater than the thickness of the first protective film layer, and the thickness of the first protective film layer is greater than the thickness of the second protective film layer.

33. The optical transmission element according to claim 1, characterized in that Chamfers are provided at transitions between the light-transmitting surface and the first reflecting surface and the second reflecting surface.

34. The optical transmission element according to claim 33, characterized in that The optical transmission element includes a light absorbing member disposed at the chamfer.

35. The optical transmission element according to claim 1, characterized in that The optical transmission element further includes a third light absorbing film and a fourth light absorbing film. The third light absorbing film is disposed on the first reflection surface to define a light aperture of the first reflection surface. The fourth light absorbing film is disposed on the second reflection surface to define a light aperture of the second reflection surface.

36. The optical transmission element according to claim 1, characterized in that The light-transmitting surface is provided with a substantially annular light-absorbing region, the light-entering region and the light-emitting region are both arranged within the range defined by the light-absorbing region, and the optical transmission element further comprises a fifth light-absorbing film arranged in the light-absorbing region.

37. The optical transmission element according to claim 36, characterized in that The light absorbing area of ​​the light-transmitting surface is set as a diffuse reflection surface.

38. The optical transmission element according to claim 1, characterized in that The angle between the first reflecting surface and the bottom surface, and the angle between the second reflecting surface and the bottom surface are both 25°-35°, and the refractive index of the optical transmission element is 1.5-1.

9.

39. A shooting module, characterized in that: It comprises a lens, an image sensor and a transmission optical element as described in any one of claims 1 to 38, wherein the light incident area is arranged corresponding to the light emitting side of the lens, and the light emitting area is arranged corresponding to the photosensitive surface of the image sensor.

40. The shooting module according to claim 39, characterized in that: The light-transmitting surface is perpendicular to the axis of the lens and the axis of the image sensor.

41. The shooting module according to claim 39, characterized in that: The lens and the image sensor at least partially overlap in the axial direction of the lens.

42. An electronic device, characterized in that: It comprises a shell and a shooting module as described in any one of claims 39-41, wherein the shell is provided with a light inlet hole, and the light incident side of the lens is arranged corresponding to the light inlet hole.

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