Prism, imaging device, and electronic apparatus

Abstract

The utility model discloses a prism, a camera device and electronic equipment. The prism comprises a prism base material which is provided with a plurality of reflecting surfaces; each reflecting surface is provided with one coating group, each coating group comprises a dielectric layer, the dielectric layer comprises a first sub-layer and a second sub-layer, and the first sub-layer is located between the second sub-layer and the reflecting surface; the metal layer is arranged on one side, deviating from the first sub-layer, of the second sub-layer; wherein the refractive index of the first sub-layer is greater than that of the second sub-layer.

Description

Technical Field

[0001] The present application belongs to the technical field of camera devices, and specifically relates to a prism, a camera device, and an electronic device. Background Art

[0002] The camera device of the electronic device uses a prism to achieve the purpose of increasing the focal length of the camera device. In the related art, when a prism with a refractive index lower than 1.7 is used, the reflectivity of the prism is low, which greatly reduces the performance of the camera device. Utility Model Content

[0003] The present application aims to provide a prism, an imaging device, and an electronic device, which solve one of the problems in the related art that when an imaging device includes a prism with a refractive index lower than 1.7, the reflectivity of the prism is low.

[0004] In order to solve the above technical problems, this application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a prism, comprising: a prism substrate having multiple reflective surfaces; multiple coating groups, with one coating group provided on each reflective surface, the coating group comprising: a dielectric layer, the dielectric layer comprising a first sublayer and a second sublayer, the first sublayer being located between the second sublayer and the reflective surface; a metal layer, located on the side of the second sublayer facing away from the first sublayer; wherein the refractive index of the first sublayer is greater than the refractive index of the second sublayer.

[0006] In a second aspect, an embodiment of the present application provides a camera device, comprising: a filter; such as the prism in the first aspect, the filter is located on one side of the prism.

[0007] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a housing; and the camera device according to the second aspect, wherein the camera device is disposed in the housing.

[0008] In an embodiment of the present application, a prism includes a prism substrate and a plurality of coating groups. The prism substrate has a plurality of reflective surfaces, and each reflective surface is matched with a coating group.

[0009] Any coating group among the plurality of coating groups includes a dielectric layer and a metal layer. In the coating group, the dielectric layer is located between the reflective surface and the metal layer, that is, the dielectric layer is closer to the reflective surface of the prism substrate than the metal layer.

[0010] The dielectric layer includes a first sublayer and a second sublayer, which are stacked. Specifically, the first sublayer is located between the second sublayer and the reflective surface, and the metal layer is located on a side of the second sublayer facing away from the first sublayer. The refractive index of the first sublayer is greater than that of the second sublayer.

[0011] It is understood that the refractive index of the prism substrate of the present application is less than 1.7.

[0012] By reasonably setting the matching structure of the reflective surface of the prism substrate, the first sublayer of the dielectric layer, the second sublayer of the dielectric layer and the metal layer, and utilizing the coherence of light, the propagation path of the light is adjusted through the dielectric layer and the metal layer to achieve the purpose of improving the reflectivity of the prism, thereby ensuring the performance of the camera device using a prism with a refractive index lower than 1.7, so that the performance of the camera device is not limited by the refractive index of the prism, and the adaptability of the camera device can be improved.

[0013] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 is a partial structural diagram of a prism according to an embodiment of the present application;

[0016] Figure 2 is a schematic structural diagram of the dielectric layer of the first embodiment of the present application;

[0017] Figure 3 is a schematic structural diagram of a dielectric layer according to a second embodiment of the present application;

[0018] Figure 4 1 is a schematic structural diagram of a protective layer according to an embodiment of the present application;

[0019] Figure 5 is a graph showing how the reflectivity of the prism according to the first embodiment of the present application and the prism in the related art changes with wavelength;

[0020] Figure 6 This is a graph showing how the reflectivity of the prism according to the second embodiment of the present application and the prism in the related art changes with wavelength.

[0021] Reference numerals:

[0022] Figures 1 to 4 The corresponding relationship between the reference numerals and component names is as follows:

[0023] 10 prism, 100 prism substrate, 110 reflecting surface, 200 coating group, 210 dielectric layer, 212 sublayers, 212a first sublayer, 212b second sublayer, 212c third sublayer, 220 metal layer, 230 bonding layer, 240 protective layer, 242 first protective sublayer, 244 second protective sublayer, 246 third protective sublayer. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0028] The following is combined with Figures 1 to 6 The prism 10, the camera device, and the electronic device provided in the embodiments of the present application are described.

[0029] like Figure 1As shown, the prism 10 according to some embodiments of the present application includes: a prism substrate 100, the prism substrate 100 has a plurality of reflective surfaces 110; a plurality of coating groups 200, each reflective surface 110 is provided with a coating group 200, the coating group 200 includes: a dielectric layer 210; a metal layer 220, the dielectric layer 210 is located between the reflective surface 110 and the metal layer 220; the dielectric layer 210 includes a plurality of sub-layers 212, the plurality of sub-layers 212 are stacked along the direction from the reflective surface 110 to the dielectric layer 210, and the refractive index of any two adjacent sub-layers 212 is different.

[0030] In the embodiment of the present application, the prism 10 includes a prism substrate 100 and a plurality of coating groups 200. The prism substrate 100 has a plurality of reflective surfaces 110, and each reflective surface 110 is matched with a coating group 200.

[0031] Any coating set 200 includes a dielectric layer 210 and a metal layer 220. In the coating set 200, the dielectric layer 210 is located between the reflective surface 110 and the metal layer 220. That is, the dielectric layer 210 is closer to the reflective surface 110 of the prism substrate 100 than the metal layer 220.

[0032] The dielectric layer 210 includes a plurality of sub-layers 212, and the plurality of sub-layers 212 are stacked along a direction from the reflective surface 110 to the dielectric layer 210. Among the plurality of sub-layers 212, any two adjacent sub-layers 212 have different refractive indices.

[0033] It can be understood that the refractive index of the prism substrate 100 of the present application is less than 1.7.

[0034] By reasonably arranging the matching structure of the reflective surface 110 of the prism substrate 100, the multiple sublayers 212 of the dielectric layer 210 and the metal layer 220, and utilizing the coherence of light, the propagation path of the light is adjusted through the dielectric layer 210 and the metal layer 220 to achieve the purpose of improving the reflectivity of the prism 10, thereby ensuring the performance of the camera device using the prism 10 with a refractive index lower than 1.7, so that the performance of the camera device is not limited by the refractive index of the prism 10, and the adaptability of the camera device can be improved.

[0035] In some embodiments, as Figure 2 As shown, the plurality of sublayers 212 include a first sublayer 212a and a second sublayer 212b, wherein the first sublayer 212a is located between the second sublayer 212b and the reflective surface 110; wherein the refractive index of the first sublayer 212a is greater than the refractive index of the second sublayer 212b.

[0036] In this embodiment, the structure of the dielectric layer 210 is further defined.

[0037] The plurality of sub-layers 212 include a first sub-layer 212a and a second sub-layer 212b. That is, the dielectric layer 210 includes the first sub-layer 212a and the second sub-layer 212b. The first sub-layer 212a and the second sub-layer 212b have different refractive indices.

[0038] The refractive index of the first sub-layer 212 a is greater than the refractive index of the second sub-layer 212 b , and the first sub-layer 212 a is located between the second sub-layer 212 b and the reflective surface 110 .

[0039] That is, the first sublayer 212a with a larger refractive index is located between the reflective surface 110 of the prism substrate 100 and the second sublayer 212b with a smaller refractive index. In other words, the first sublayer 212a with a larger refractive index is closer to the reflective surface 110 of the prism substrate 100 than the second sublayer 212b with a smaller refractive index.

[0040] This configuration rationally arranges the matching structure of the first sublayer 212a, the second sublayer 212b and the reflective surface 110 of the prism substrate 100 having different refractive indices, and utilizes the coherence of light to adjust the propagation path of the light through the dielectric layer 210 and the metal layer 220 to achieve the purpose of improving the reflectivity of the prism 10.

[0041] In some embodiments, the number of the first sublayer 212a and the number of the second sublayer 212b are both plural, and the number of the first sublayer 212a and the second sublayer 212b are equal, and one second sublayer 212b is disposed between any two adjacent first sublayers 212a.

[0042] In this embodiment, the structure of the dielectric layer 210 is further defined.

[0043] The number of the first sub-layers 212 a is N, the number of the second sub-layers 212 b is N, and one second sub-layer 212 b is disposed between any two adjacent first sub-layers 212 a, where N≥2.

[0044] Specifically, when N=2, along the direction from the reflective surface 110 to the coating group 200, the dielectric layer 210 sequentially includes a first sublayer 212a, a second sublayer 212b, a first sublayer 212a, and a second sublayer 212b.

[0045] Specifically, when N=3, along the direction from the reflective surface 110 to the coating group 200, the dielectric layer 210 sequentially includes a first sublayer 212a, a second sublayer 212b, a first sublayer 212a, a second sublayer 212b, a first sublayer 212a, and a second sublayer 212b.

[0046] In some other embodiments, N is greater than 3, such as N=4, N=5, and N=6, etc., which are not listed here one by one.

[0047] In some embodiments, as Figure 3 As shown, the dielectric layer 210 further includes a third sublayer 212c, which is located on the side of the second sublayer 212b away from the first sublayer 212a; the refractive index of the third sublayer 212c is greater than the refractive index of the second sublayer 212b, and the refractive index of the third sublayer 212c is less than the refractive index of the first sublayer 212a.

[0048] In some embodiments, as Figure 3 As shown, the multiple sublayers 212 also include a third sublayer 212c, which is located on the side of the second sublayer 212b away from the first sublayer 212a; the refractive index of the third sublayer 212c is greater than the refractive index of the second sublayer 212b, and the refractive index of the third sublayer 212c is less than the refractive index of the first sublayer 212a.

[0049] In this embodiment, the structure of the dielectric layer 210 is further defined.

[0050] The dielectric layer 210 includes a first sublayer 212a, a second sublayer 212b, and a third sublayer 212c. The third sublayer 212c is located on the side of the second sublayer 212b facing away from the first sublayer 212a. That is, the second sublayer 212b is located between the first sublayer 212a and the third sublayer 212c. The first sublayer 212a is closer to the reflective surface 110 of the prism substrate 100 than the second sublayer 212b. In other words, the dielectric layer 210 includes the first sublayer 212a, the second sublayer 212b, and the third sublayer 212c.

[0051] The refractive index of the third sublayer 212c is greater than that of the second sublayer 212b, and the refractive index of the third sublayer 212c is less than that of the first sublayer 212a. In other words, the refractive indices of any two of the first sublayer 212a, the second sublayer 212b, and the third sublayer 212c are different. The third sublayer 212c is a medium refractive index layer, the second sublayer 212b is a low refractive index layer, and the first sublayer 212a is a high refractive index layer.

[0052] This configuration rationally arranges the coordination structure of the first sublayer 212a, the second sublayer 212b, the third sublayer 212c and the reflective surface 110 of the prism substrate 100 with different refractive indices, and utilizes the coherence of light to adjust the propagation path of the light through the dielectric layer 210 and the metal layer 220 to achieve the purpose of improving the reflectivity of the prism 10.

[0053] In some embodiments, the prism substrate 100 includes a glass prism substrate or a plastic prism substrate.

[0054] In this embodiment, the type of the prism substrate 100 is further limited.

[0055] Specifically, the prism substrate 100 includes a glass prism substrate or a plastic prism substrate. In other words, the prism substrate 100 includes a glass prism substrate or a plastic prism substrate.

[0056] Specifically, the refractive index of the glass prism substrate is less than 1.7.

[0057] Specifically, the refractive index of the plastic prism substrate is less than 1.7.

[0058] In some embodiments, the first sub-layer 212a includes a titanium dioxide layer; the second sub-layer 212b includes a silicon dioxide layer; and the third sub-layer 212c includes an aluminum oxide layer.

[0059] In this embodiment, the types of the first sub-layer 212 a , the second sub-layer 212 b , and the third sub-layer 212 c are further defined.

[0060] When the dielectric layer 210 includes the first sub-layer 212 a and the second sub-layer 212 b , the first sub-layer 212 a includes a titanium dioxide layer, and the second sub-layer 212 b includes a silicon dioxide layer.

[0061] When the dielectric layer 210 includes the first sublayer 212a, the second sublayer 212b, and the third sublayer 212c, the first sublayer 212a includes a titanium dioxide layer, the second sublayer 212b includes a silicon dioxide layer, and the third sublayer 212c includes an aluminum oxide layer.

[0062] In some embodiments, the metal layer 220 includes a silver layer or an aluminum layer. The thickness of the metal layer 220 is related to the reflectivity of the prism 10 , and the thickness of the metal layer 220 is greater than a first threshold.

[0063] In this embodiment, the type of the metal layer 220 is further defined.

[0064] The metal layer 220 includes a silver layer or an aluminum layer, that is, the metal layer 220 includes a silver layer, or the metal layer 220 includes an aluminum layer.

[0065] The thickness of the metal layer 220 is related to the reflectivity of the prism 10. The thickness of the metal layer 220 is greater than a first threshold value, which may be 50 nm. Examples of thicknesses of the metal layer 220 include 55 nm, 60 nm, 65 nm, and 70 nm, which are not listed here.

[0066] If the thickness of the metal layer 220 is less than or equal to 50 nm, the reflection of light is insufficient, and the effect of improving the overall reflectivity of the prism 10 is poor.

[0067] The prism 10 of the present application includes a prism substrate 100 and multiple coating groups 200. The prism substrate 100 has multiple reflective surfaces 110, each of which is provided with a coating group 200. The coating group 200 includes a dielectric layer 210 and a metal layer 220. The dielectric layer 210 is located between the reflective surface 110 and the metal layer 220. The dielectric layer 210 includes multiple sublayers 212, which are stacked along the direction from the reflective surface 110 to the dielectric layer 210. The refractive index of any two adjacent sublayers 212 is different. The metal layer 220 includes a silver layer. Prisms in the related art are not provided with the coating group of the present application. Figure 5 The comparative curve of the reflectivity of the prism 10 of the present application and the prism in the related art is shown. Figure 5 It can be seen that the prism 10 of the present application has a higher reflectivity than the prism in the related art. When the wavelength of the coating group 200 is within the range of 420nm to 680nm, the average reflectivity of the prism 10 is greater than 97%.

[0068] The prism 10 of the present application includes a prism substrate 100 and multiple coating groups 200. The prism substrate 100 has multiple reflective surfaces 110, each of which is provided with a coating group 200. The coating group 200 includes a dielectric layer 210 and a metal layer 220. The dielectric layer 210 is located between the reflective surface 110 and the metal layer 220. The dielectric layer 210 includes multiple sublayers 212, which are stacked along the direction from the reflective surface 110 to the dielectric layer 210. The refractive index of any two adjacent sublayers 212 is different. The metal layer 220 includes an aluminum layer. Prisms in the related art are not provided with the coating group of the present application. Figure 6 The comparative curve of the reflectivity of the prism 10 of the present application and the prism in the related art is shown. Figure 6 It can be seen that the prism 10 of the present application has a higher reflectivity than the prism in the related art. When the wavelength of the coating group 200 is within the range of 420nm to 680nm, the average reflectivity of the prism 10 is greater than 93%.

[0069] In some embodiments, as Figure 1 As shown, the coating assembly 200 further includes a bonding layer 230 , which is located between the reflective surface 110 and the dielectric layer 210 . The bonding layer 230 includes any one of the following or a combination thereof: an aluminum oxide layer, a silicon dioxide layer, and a titanium dioxide layer.

[0070] In this embodiment, the structure of the coating set 200 is further defined.

[0071] The coating assembly 200 further includes a bonding layer 230 , which is located between the reflective surface 110 and the dielectric layer 210 .

[0072] Specifically, the bonding layer 230 includes any one of the following or a combination thereof: an aluminum oxide layer, a silicon dioxide layer, and a titanium dioxide layer.

[0073] The bonding layer 230 serves to enhance the bonding strength between the reflective surface 110 of the prism substrate 100 and the dielectric layer 210. The bonding layer 230 is first attached to the reflective surface 110 of the prism substrate 100 to enhance the bonding strength for the subsequent placement of the dielectric layer 210. This allows the dielectric layer 210 to be effectively assembled with the reflective surface 110 of the prism substrate 100, providing structural support to ensure the reflectivity of the prism 10.

[0074] In some embodiments, the thickness of the bonding layer 230 is related to the reflectivity of the prism 10 , and the thickness of the bonding layer 230 is greater than or equal to the second threshold and less than or equal to the third threshold.

[0075] In this embodiment, the thickness of the bonding layer 230 is further defined.

[0076] The thickness of the bonding layer 230 is related to the reflectivity of the prism 10. The thickness of the bonding layer 230 is greater than or equal to the second threshold and less than or equal to the third threshold. This setting can ensure the bonding strength. The second threshold can be 5nm and the third threshold can be 100nm.

[0077] Specifically, the thickness of the bonding layer 230 includes 10 nm, 20 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, and 90 nm, etc., which are not listed here one by one.

[0078] When the thickness of the bonding layer 230 is less than 5 nm, the bonding force is poor, and the dielectric layer 210 and the reflective surface 110 are easily separated, and the performance of the prism 10 cannot be guaranteed.

[0079] When the thickness of the bonding layer 230 is greater than 100 nm, the material of the bonding layer 230 will be wasted, the production cost of the prism 10 will increase, and this setting will also affect the reflectivity of the prism 10.

[0080] In some embodiments, as Figure 1 As shown, the coating assembly 200 further includes a protective layer 240 , which is disposed on a side of the metal layer 220 facing away from the dielectric layer 210 .

[0081] In this embodiment, the structure of the coating set 200 is further defined.

[0082] Coating assembly 200 further includes a protective layer 240, which is disposed on the side of metal layer 220 facing away from dielectric layer 210. Protective layer 240 protects metal layer 220 by isolating it from moisture, dirt, and other impurities in the environment, preventing oxidation of metal layer 220 due to contact with moisture, dirt, and other impurities, thereby providing structural support to ensure the performance of prism 10.

[0083] In some embodiments, the protective layer 240 includes at least one of a first protective sublayer 242, a second protective sublayer 244, and a third protective sublayer 246; the first protective sublayer 242 includes any one of the following or a combination thereof: a silicon oxide layer, a titanium oxide layer, and an aluminum oxide layer; the second protective sublayer 244 includes a metal protective layer; the third protective sublayer 246 includes an ink layer; when the protective layer 240 includes the first protective sublayer 242 and the second protective sublayer 244, the second protective sublayer 244 is located between the metal layer 220 and the first protective sublayer 242; when the protective layer 240 includes the first protective sublayer 242 and the third protective sublayer When the protective layer 240 includes the second protective sublayer 244 and the third protective sublayer 246, the first protective sublayer 242 is located between the metal layer 220 and the third protective sublayer 246; when the protective layer 240 includes the second protective sublayer 244 and the third protective sublayer 246, the second protective sublayer 244 is located between the metal layer 220 and the third protective sublayer 246; when the protective layer 240 includes the first protective sublayer 242, the second protective sublayer 244 and the third protective sublayer 246, the first protective sublayer 242 is located between the second protective sublayer 244 and the third protective sublayer 246, and the second protective sublayer 244 is located on the side of the metal layer 220 facing away from the dielectric layer 210.

[0084] In this embodiment, the type of the protection layer 240 is further limited.

[0085] The protective layer 240 includes at least one of a first protective sub-layer 242 , a second protective sub-layer 244 , and a third protective sub-layer 246 .

[0086] Specifically, the protection layer 240 includes a first protection sub-layer 242 , and the first protection sub-layer 242 includes any one of the following or a combination thereof: a silicon oxide layer, a titanium oxide layer, and an aluminum oxide layer.

[0087] Specifically, the protection layer 240 includes a second protection sub-layer 244 , and the second protection sub-layer 244 includes a metal protection layer.

[0088] Specifically, the protective layer 240 includes a third protective sub-layer 246 , and the third protective sub-layer 246 includes an ink layer.

[0089] Specifically, when the protection layer 240 includes the first protection sub-layer 242 and the second protection sub-layer 244 , the second protection sub-layer 244 is located between the metal layer 220 and the first protection sub-layer 242 .

[0090] Specifically, when the protection layer 240 includes the first protection sub-layer 242 and the third protection sub-layer 246 , the first protection sub-layer 242 is located between the metal layer 220 and the third protection sub-layer 246 .

[0091] Specifically, when the protection layer 240 includes the second protection sub-layer 244 and the third protection sub-layer 246 , the second protection sub-layer 244 is located between the metal layer 220 and the third protection sub-layer 246 .

[0092] Specifically, if Figure 4 As shown, when the protection layer 240 includes a first protection sublayer 242 , a second protection sublayer 244 and a third protection sublayer 246 , the first protection sublayer 242 is located between the second protection sublayer 244 and the third protection sublayer 246 , and the second protection sublayer 244 is located on the side of the metal layer 220 away from the dielectric layer 210 .

[0093] In some embodiments, when the protective layer 240 includes a first protective sublayer 242, the thickness of the first protective sublayer 242 is related to the reflectivity of the prism 10, and the thickness of the first protective sublayer 242 is greater than or equal to the fourth threshold; when the protective layer 240 includes a second protective sublayer 244, the second protective sublayer 244 includes a chromium layer and / or a nickel layer, the thickness of the second protective sublayer 244 is related to the reflectivity of the prism 10, and the thickness of the second protective sublayer 244 is greater than or equal to the fifth threshold; when the protective layer 240 includes a third protective sublayer 246, the thickness of the third protective sublayer 246 is related to the reflectivity of the prism 10, and the thickness of the third protective sublayer 246 is greater than or equal to the sixth threshold and less than or equal to the seventh threshold.

[0094] In this embodiment, the structure of the protection layer 240 is further defined.

[0095] When the protective layer 240 includes a first protective sublayer 242, the thickness of the first protective sublayer 242 is related to the reflectivity of the prism 10 and is greater than or equal to a fourth threshold. The fourth threshold may be 130 nm. This configuration ensures effective protection of the metal layer 220. If the thickness of the first protective sublayer 242 is less than 130 nm, the protective effect on the metal layer 220 is poor, and the metal layer 220 is susceptible to oxidation over time as the prism 10 is used.

[0096] Optionally, the thickness of the first protection sublayer 242 includes 140 nm, 150 nm, 160 nm, 170 nm, etc., which are not listed here one by one.

[0097] When the protective layer 240 includes a second protective sublayer 244, the second protective sublayer 244 includes a chromium layer and / or a nickel layer. The thickness of the second protective sublayer 244 is related to the reflectivity of the prism 10. The thickness of the second protective sublayer 244 is greater than or equal to a fifth threshold value, wherein the fifth threshold value can be 30 nm. In other words, the type of the second protective sublayer 244 is limited, and the range of values ​​for the thickness of the second protective sublayer 244 is limited. This setting can ensure the protective effect of the metal layer 220. If the thickness of the second protective sublayer 244 is less than 30 nm, the protective effect of the metal layer 220 is poor, and the metal layer 220 is easily oxidized as the prism 10 is used for a longer time.

[0098] Optionally, the thickness of the second protection sublayer 244 includes 40 nm, 45 nm, 50 nm, 60 nm, 70 nm, etc., which are not listed here one by one.

[0099] When the protective layer 240 includes a third protective sublayer 246, the thickness of the third protective sublayer 246 is related to the reflectivity of the prism 10, and the thickness of the third protective sublayer 246 is greater than or equal to the sixth threshold value and less than or equal to the seventh threshold value. Among them, the sixth threshold value can be 5μm, and the seventh threshold value can be 15μm. That is, the value range of the thickness of the third protective sublayer 246 is limited. This setting can ensure the protective effect of the metal layer 220. If the thickness of the third protective sublayer 246 is less than 5μm, the protective effect of the metal layer 220 is poor, and as the use time of the prism 10 increases, the metal layer 220 is easily oxidized. If the thickness of the third protective sublayer 246 is greater than 15μm, the material cost is high, resulting in high production cost of the prism 10, and it will also affect the reflectivity of the prism 10.

[0100] Optionally, the thickness of the third protection sublayer 246 includes 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, etc., which are not listed here one by one.

[0101] According to some further embodiments of the present application, a camera device includes: a filter; and a prism 10 as in any of the above embodiments, wherein the filter is located on one side of the prism 10 .

[0102] The camera device provided in the present application includes the prism 10 of any of the above embodiments, and therefore has all the beneficial effects of the above prism 10, which will not be described one by one here.

[0103] Optionally, the filter can absorb infrared light to perform a filtering function.

[0104] According to some further embodiments of the present application, an electronic device includes: a housing; and a camera device as described in any of the above embodiments, wherein the camera device is disposed in the housing.

[0105] The electronic device provided in this application includes the camera device of any of the above embodiments and therefore has all the beneficial effects of the above camera devices, which will not be described one by one here.

[0106] Optionally, the electronic device may be a mobile terminal such as a mobile phone, a wearable device, a tablet computer, a laptop computer, a mobile computer, an augmented reality device (also known as an AR (Augmented Reality) device), a virtual reality device (also known as a VR (Virtual Reality) device) and a handheld game console, etc.

[0107] Optionally, the camera device is provided on the housing, and the housing serves as a mounting carrier of the camera device and has the function of mounting and fixing the camera device.

[0108] In the present application, the dielectric layer 210 is first plated on the reflective surface 110 of the prism substrate 100, followed by the metal layer 220, and finally the protective layer 240. The reflectivity of the prism 10 of the present application is improved within a range of 2% to 4%.

[0109] A high reflective coating (ie, coating assembly 200 ) is applied to the inclined surface (ie, reflective surface 110 ) of the plastic prism substrate or the glass prism substrate. The coating assembly 200 needs to be designed and manufactured according to the actual propagation path of light.

[0110] Optionally, the prism substrate 100 of the present application includes a glass prism substrate or a plastic prism substrate, and the refractive index of the prism substrate 100 is less than 1.7.

[0111] Optionally, a bonding layer 230 is provided between the reflective surface 110 and the dielectric layer 210. The bonding layer 230 may include any one or a combination of the following: an aluminum oxide layer (Al2O3 layer), a silicon dioxide layer (SiO2 layer), and a titanium dioxide layer (TiO2 layer). The thickness of the bonding layer 230 is greater than or equal to 5 nm and less than or equal to 100 nm. The bonding layer 230 is first attached to the reflective surface 110 of the prism substrate 100 to enhance bonding strength for the dielectric layer 210.

[0112] Alternatively, as Figure 2 As shown, the dielectric layer 210 includes a low refractive index layer (eg, a silicon dioxide layer (SiO2 layer)) and a high refractive index layer (eg, a titanium dioxide layer (TiO2 layer)). The low refractive index layer is the second sublayer 212b, and the high refractive index layer is the first sublayer 212a.

[0113] When the number of the first sublayer 212a and the number of the second sublayer 212b are both one, the first sublayer 212a is located between the second sublayer 212b and the reflective surface 110. This arrangement can enhance the reflectivity of the prism 10.

[0114] When the number of the first sub-layer 212a and the second sub-layer 212b are both two, the dielectric layer 210 includes the first sub-layer 212a, the second sub-layer 212b, the first sub-layer 212a, and the second sub-layer 212b in sequence along the direction from the reflective surface 110 to the coating assembly 200. This arrangement can enhance the reflectivity of the prism 10.

[0115] When the number of the first sub-layer 212a and the second sub-layer 212b are both three, the dielectric layer 210 includes the first sub-layer 212a, the second sub-layer 212b, the first sub-layer 212a, the second sub-layer 212b, the first sub-layer 212a, the second sub-layer 212b, the first sub-layer 212a, and the second sub-layer 212b in the direction from the reflective surface 110 to the coating assembly 200. This arrangement can enhance the reflectivity of the prism 10.

[0116] Alternatively, as Figure 3 As shown, dielectric layer 210 includes a low refractive index layer (e.g., a silicon dioxide layer (SiO2 layer)), a high refractive index layer (e.g., a titanium dioxide layer (TiO2 layer)), and a medium refractive index layer (e.g., an aluminum oxide layer (Al2O3 layer)). The low refractive index layer is the second sublayer 212b, the high refractive index layer is the first sublayer 212a, and the medium refractive index layer is the third sublayer 212c. The second sublayer 212b is located between the first sublayer 212a and the third sublayer 212c, and the third sublayer 212c is located on the side of the second sublayer 212b facing away from the first sublayer 212a.

[0117] Optionally, the metal layer 220 includes a silver layer or an aluminum layer, and the thickness of the metal layer 220 is greater than 50 nm.

[0118] Optionally, the protective layer 240 includes a first protective sublayer 242, and the first protective sublayer 242 includes any one of the following or a combination thereof: a silicon oxide layer (SiO x layer), titanium oxide layer (TiO x layer) and aluminum oxide layer (AlO x The thickness of the first protective sublayer 242 is greater than or equal to 130 nm.

[0119] Optionally, the protective layer 240 includes a second protective sublayer 244, and the second protective sublayer 244 includes a metal protective layer. Specifically, the second protective sublayer 244 includes a chromium layer and / or a nickel layer, and the thickness of the second protective sublayer 244 is greater than or equal to 30 nm.

[0120] Optionally, the protective layer 240 includes a third protective sub-layer 246 , the third protective sub-layer 246 includes an ink layer, and the thickness of the third protective sub-layer 246 is greater than or equal to 5 μm and less than or equal to 15 μm.

[0121] Optionally, the protection layer 240 includes a first protection sub-layer 242 and a third protection sub-layer 246 , and the first protection sub-layer 242 is located between the metal layer 220 and the third protection sub-layer 246 .

[0122] Optionally, when the protection layer 240 includes the second protection sub-layer 244 and the third protection sub-layer 246 , the second protection sub-layer 244 is located between the metal layer 220 and the third protection sub-layer 246 .

[0123] in, Figure 1 The arrows in the figure indicate the paths along which the light travels.

[0124] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0125] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A prism, characterized in that: include: a prismatic substrate having a plurality of reflective surfaces; Multiple coating groups, each of the reflective surfaces is provided with one coating group, and the coating groups include: a dielectric layer, the dielectric layer comprising a first sublayer and a second sublayer, the first sublayer being located between the second sublayer and the reflective surface; a metal layer, provided on a side of the second sub-layer facing away from the first sub-layer; The refractive index of the first sub-layer is greater than the refractive index of the second sub-layer.

2. The prism according to claim 1, wherein There are multiple first sub-layers and multiple second sub-layers, and the number of the first sub-layers and the number of the second sub-layers are equal. One second sub-layer is arranged between any two adjacent first sub-layers.

3. The prism according to claim 1, wherein: The dielectric layer further includes a third sublayer, and the third sublayer is located on a side of the second sublayer facing away from the first sublayer; The refractive index of the third sub-layer is greater than the refractive index of the second sub-layer, and the refractive index of the third sub-layer is less than the refractive index of the first sub-layer.

4. The prism according to claim 3, wherein: The prism substrate includes a glass prism substrate or a plastic prism substrate; The first sublayer includes a titanium dioxide layer; The second sublayer includes a silicon dioxide layer; The third sub-layer includes an aluminum oxide layer.

5. The prism according to any one of claims 1 to 4, characterized in that The metal layer includes a silver layer or an aluminum layer. The thickness of the metal layer is related to the reflectivity of the prism, and the thickness of the metal layer is greater than a first threshold.

6. The prism according to any one of claims 1 to 4, characterized in that The coating set also includes: A bonding layer is located between the reflective surface and the dielectric layer, and the bonding layer includes any one of the following or a combination thereof: an aluminum oxide layer, a silicon dioxide layer, and a titanium dioxide layer.

7. The prism according to claim 6, wherein: The thickness of the bonding layer is related to the reflectivity of the prism, and the thickness of the bonding layer is greater than or equal to a second threshold and less than or equal to a third threshold.

8. The prism according to any one of claims 1 to 4, characterized in that The coating set also includes: A protective layer is provided on a side of the metal layer facing away from the dielectric layer.

9. The prism according to claim 8, wherein The protective layer includes at least one of a first protective sublayer, a second protective sublayer, and a third protective sublayer; The first protective sublayer includes any one of the following or a combination thereof: a silicon oxide layer, a titanium oxide layer, and an aluminum oxide layer; The second protective sublayer includes a metal protective layer; The third protective sublayer includes an ink layer.

10. The prism according to claim 9, wherein When the protection layer includes the first protection sublayer and the second protection sublayer, the second protection sublayer is located between the metal layer and the first protection sublayer; When the protection layer includes the first protection sublayer and the third protection sublayer, the first protection sublayer is located between the metal layer and the third protection sublayer; When the protection layer includes the second protection sublayer and the third protection sublayer, the second protection sublayer is located between the metal layer and the third protection sublayer; When the protection layer includes the first protection sublayer, the second protection sublayer and the third protection sublayer, the first protection sublayer is located between the second protection sublayer and the third protection sublayer, and the second protection sublayer is located on a side of the metal layer away from the dielectric layer.

11. The prism according to claim 9, wherein When the protective layer includes the first protective sublayer, the thickness of the first protective sublayer is related to the reflectivity of the prism, and the thickness of the first protective sublayer is greater than or equal to a fourth threshold; When the protective layer includes the second protective sublayer, the second protective sublayer includes a chromium layer and / or a nickel layer, the thickness of the second protective sublayer is related to the reflectivity of the prism, and the thickness of the second protective sublayer is greater than or equal to a fifth threshold; When the protective layer includes the third protective sublayer, the thickness of the third protective sublayer is related to the reflectivity of the prism, and the thickness of the third protective sublayer is greater than or equal to a sixth threshold and less than or equal to a seventh threshold.

12. A camera device, characterized in that: include: optical filters; The prism according to any one of claims 1 to 11, wherein the filter is located on one side of the prism.

13. An electronic device, characterized in that: include: case; and The camera device according to claim 12, wherein the camera device is provided in the housing.

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