Optical lens and manufacturing method thereof, prism, camera module and electronic device

Abstract

Embodiments of the present application provide an optical lens, a manufacturing method thereof, a prism, a camera module and an electronic device, and aim to solve the technical problem of poor mechanical stability of the prism. The optical lens is internally provided with a light blocking wall, the light blocking wall has a light blocking color and is free of cracks. After the light blocking wall is processed, the structural density of the optical lens does not change greatly, the optical lens can maintain good mechanical stability, the optical lens is prevented from being broken, and the reliability of the prism is improved.

Description

Technical Field

[0001] This application relates to the field of optical device technology, specifically to an optical lens and its manufacturing method, a prism, a camera module, and an electronic device. Background Technology

[0002] Electronic devices (such as mobile phones or tablets) are generally equipped with camera modules, which enable functions such as taking photos and recording videos. A camera module includes a lens assembly, a prism, and an optical sensor, all arranged along the optical axis. The prism incorporates light-blocking structures such as microcracks or bubbles to reduce stray light received by the optical sensor, thereby improving imaging quality. However, these microcracks or bubbles can also lead to poor mechanical stability, making the prism prone to breakage. Summary of the Invention

[0003] This application provides an optical lens and its manufacturing method, a prism, a camera module, and an electronic device, which can improve the mechanical stability of the prism and prevent it from breaking.

[0004] In a first aspect, embodiments of this application provide an optical lens, comprising: an optical lens having a light-blocking wall disposed inside the optical lens, the light-blocking wall having a light-blocking color, and the light-blocking wall being free of cracks.

[0005] The light-blocking barrier has a specific color and is crack-free, meaning it is formed using a non-destructive process. This crack-free state means that under visible magnification, such as observation with an electron microscope with a precision of 20μm or 50μm, there are no obvious structural changes such as bubbles, cavities, or cracks within the light-blocking barrier. This ensures the optical lens maintains good mechanical stability, preventing breakage and improving the prism's reliability.

[0006] From another perspective, the absence of cracks within the light barrier ensures that the structural density of the optical lens does not change significantly after the light barrier is fabricated, allowing the optical lens to maintain good mechanical stability. For example, the ratio of the overall structural density of the optical lens to the structural density of the light barrier is greater than or equal to 97% and less than or equal to 103% (e.g., 97%, 100%, 103%, etc.). In some embodiments, the ratio of the overall structural density of the optical lens to the structural density of the light barrier is greater than or equal to 98% and less than or equal to 102% (e.g., 98%, 100%, 102%).

[0007] In some embodiments that may include the above-described examples, the light barrier can be formed using a laser engraving process. That is, by irradiating the interior of an optical lens with a laser, a localized modification zone is formed within the lens, creating a non-destructive light barrier. Specifically, the material in the laser-affected area of ​​the optical lens is ionized, forming electrons and holes, and creating lattice distortion near the focal point. This distortion traps electrons / holes, changing the color of the area and forming the light barrier. Since the light barrier is formed by distorting and trapping electrons / holes, its structure is physically indistinguishable from other areas of the optical lens (such as the effective optical area), except for color differences. For example, under electron microscopes with 20μm or 50μm resolution, no obvious structural differences are usually visible; the difference is generally in the chemical bonds. This achieves non-destructive processing, and correspondingly, the non-destructive light barrier typically also avoids physical damage such as burst points.

[0008] In some embodiments, the light barrier can be processed using femtosecond or picosecond lasers. The processing precision is in the sub-micron to nanometer range, offering high accuracy. In some examples, the laser engraving process can use a 1030nm wavelength laser with a pulse energy of 100-200mJ and a scanning speed of approximately 10mm / s. This ensures high processing precision while maintaining moderate laser energy, preventing cracking caused by excessive energy.

[0009] The optical lens provided in this embodiment has a light-blocking wall inside. The light-blocking wall has a light-blocking color and is free of cracks. This ensures that the structural density of the optical lens does not change significantly after the light-blocking wall is processed, allowing the optical lens to maintain good mechanical stability, preventing breakage, and improving the reliability of the prism.

[0010] In some embodiments that may include the above implementations, the optical lens material includes glass containing oxides. The color of the light-blocking wall corresponds to the oxide; that is, during the process of forming the light-blocking wall through laser in-mode modulation, the oxide determines the color of the light-blocking wall. By including oxides within the glass, the light-blocking wall can have a specific light-blocking color, thereby improving the absorption effect on stray light. It is understood that different oxides result in different light-blocking colors in the formed light-blocking wall, and a reasonable selection of oxides can give the light-blocking wall a specific light-blocking color.

[0011] In some embodiments that may include the above-described implementations, the oxide includes at least one of boron oxide, titanium oxide, barium oxide, lanthanide oxide, and rubidium oxide. In some examples, the light-blocking color of the light-blocking wall formed when the oxide is boron oxide can be brown, and the light-blocking color of the light-blocking wall formed when the oxide is a titanium oxide can be black.

[0012] Understandably, titanium oxides are a class of oxide materials with titanium as the main component, such as titanium monoxide and titanium dioxide. Barium oxides are a class of oxide materials with barium as the main component, such as barium oxide. Lanthanide oxides are a class of oxide materials with lanthanide elements (from lanthanum to lutetium in the periodic table) as the main component, such as lanthanum oxide, cerium oxide, and praseodymium oxide. Rubidium oxides are a class of oxide materials with rubidium as the main component, such as rubidium oxide and rubidium peroxide.

[0013] Understandably, the color depth of a light barrier is related to its thickness (depth), which is the vertical dimension; the thicker the barrier, the darker the color. The color of the light barrier is also related to the degree of local modulation; the more times the same location is modulated with laser, the darker the color at that location becomes.

[0014] In some embodiments that may include the above implementations, the oxide content is greater than or equal to 5%. In this case, the light-blocking wall can have a darker color and a better light-blocking effect. In some examples, the oxide content can be greater than or equal to 10% (e.g., 10%, 20%, 30%, etc.) to further improve the light-blocking effect of the light-blocking wall.

[0015] In some embodiments that may include the above implementation, the color of the light-blocking wall includes black or brown. Black and brown have better light absorption effects and can improve the light-blocking effect.

[0016] In some embodiments that may include the above implementation, the refractive index of the optical lens is 1.49-2.1 (e.g., 1.49, 2, 2.1, etc.). This setting can ensure that the prism has good optical performance.

[0017] In some embodiments that may include the above implementation, the light barrier includes multiple stacked blocking layers, with adjacent blocking layers connected or spaced apart. The thickness of the light barrier is related to the number of blocking layers; the more blocking layers, the thicker the light barrier. Through this arrangement, multiple blocking layers form a light barrier, ensuring sufficient depth and thus improving the absorption of stray light.

[0018] Understandably, when creating a light barrier using laser engraving, a barrier layer is formed at the same depth by laser irradiation. Then, the laser irradiation depth is adjusted to form another barrier layer at a different depth, and so on, resulting in multiple stacked barrier layers inside the optical lens. In a plane perpendicular to the depth direction, the projections of adjacent barrier layers can at least partially overlap.

[0019] In some embodiments that may include the above implementation, the number of blocking layers is greater than or equal to 10 layers (such as 10 layers, 20 layers, 30 layers, etc.). With this setting, the light barrier has a certain thickness, which makes the light barrier have low transmittance. For example, the transmittance can be reduced to below 0.3%, thereby having a good light blocking effect.

[0020] In some embodiments that may include the above implementation, the number of blocking layers can be in the range of 10 to 20 layers (e.g., 10, 15, 20 layers, etc.). In this case, the light barrier can meet the requirements of low transmittance and high processing efficiency.

[0021] In some embodiments that may include the above implementation, the thickness of the barrier layer is 100μm-300μm (e.g., 100μm, 200μm, 300μm, etc.). This setting can improve the manufacturing precision of the barrier layer, thereby improving the manufacturing precision of the light barrier wall; in addition, the moderate thickness of the barrier layer also reduces the difficulty of the laser engraving process.

[0022] In some embodiments that may include the above implementation, multiple blocking layers are stacked along the depth direction of the light barrier, and the depth direction of the light barrier has a preset angle with the stray light rays within the optical lens. This arrangement also prevents the depth direction of the light barrier from being parallel to the stray light rays, thereby preventing stray light rays from passing between adjacent blocking layers and improving the light-blocking effect.

[0023] For example, the preset angle can be from 170° to 10° (such as 170°, 90°, 60°, 10°, etc.). The depth direction of the light barrier has a sufficient angle with the stray light rays to ensure the light-blocking effect.

[0024] In some embodiments that may include the above implementation, the cross-sectional shape of the light barrier along its thickness direction is at least one of triangle, rectangle, stepped shape, wave shape, and annulus.

[0025] In some embodiments that may include the above-described implementations, a frosting structure is provided on the surface of the optical lens near the light barrier. This frosting structure prevents stray light from entering the optical lens, and further absorbs stray light within the lens, thereby improving the imaging effect of the camera module.

[0026] In some embodiments that may include the above implementations, a light-shielding layer is applied to the surface of the optical lens near the light barrier. For example, the light-shielding layer may include light-shielding ink. This configuration prevents stray light from entering the optical lens, while simultaneously absorbing stray light within the optical lens, thus improving the imaging effect of the camera module.

[0027] Secondly, embodiments of this application also provide a prism, including an optical lens as described above, wherein the optical lens is provided with an incident light surface, an exit light surface and at least one reflective surface, and the prism is used to adjust the direction and / or position of light.

[0028] The prism in this application embodiment includes the optical lens in any of the above embodiments, and therefore can achieve the same technical effect and solve the same technical problem, which will not be repeated here.

[0029] In some embodiments that may include the above implementation, the optical lens is cylindrical with a trapezoidal cross-section. The incident and exiting light surfaces are spaced apart on a first surface corresponding to the lower base of the trapezoid. Reflective surfaces are provided on the second surfaces corresponding to the two sides of the trapezoid. A light-blocking wall is positioned near a third surface corresponding to the upper base of the trapezoid. With this configuration, the prism's cross-section is approximately trapezoidal. The prism is a boat-shaped prism, capable of bending light by 180°, meaning that the light entering through the incident surface and the light exiting through the exiting surface travel in opposite directions.

[0030] In some embodiments that may include the above implementation, the light-blocking wall includes a wall and a light-blocking layer, with the light-blocking layer disposed between the wall and a third surface; on the third surface, the projected area of ​​the wall is smaller than the projected area of ​​the light-blocking layer. That is, the light-blocking layer extends in a direction parallel to the third surface to cover a larger area, while the wall extends in a direction perpendicular to the third surface (depth direction). In some examples, the size of the wall is larger than the size of the light-blocking layer in the direction perpendicular to the third surface. It is understood that both the wall and the light-blocking layer can be formed using a laser engraving process. With the above configuration, both the light-blocking layer and the wall can achieve light blocking, further absorbing stray light and improving the imaging effect of the camera module.

[0031] In some embodiments that may include the above implementation, there are multiple walls, and the projections of the multiple walls on the third surface are spaced apart. This arrangement can further improve the absorption effect of stray light.

[0032] In some embodiments that may include the above implementation, the light-blocking layer includes multiple light-blocking bodies, and the multiple light-blocking bodies are arranged in a projection array on the third surface. That is, the multiple light-blocking bodies constitute a microstructure, and the microstructure can also absorb stray light and play the role of blocking light.

[0033] In some embodiments that may include the above implementations, the prism includes a first optical lens and a second optical lens, both of which are prism-shaped, and their center lines are arranged parallel to each other. The first optical lens is triangular prism-shaped and includes a first light-incident surface, a second surface, a third surface, a first light-incident surface, a first reflecting surface, a second reflecting surface, a third reflecting surface, and a first light-exiting surface, all arranged parallel to the center line. The first light-incident surface and the third reflecting surface are both disposed on the first surface, the second reflecting surface is disposed on the second surface, and the first light-exiting surface and the third reflecting surface are both disposed on the third surface.

[0034] The second optical lens includes a fourth surface, a fifth surface, a sixth surface, a seventh surface, a second light-incident surface, a fourth reflective surface, a fifth reflective surface, and a second light-exiting surface, all arranged parallel to the center line. The fourth and sixth surfaces are located between the fifth and seventh surfaces. The fourth surface faces the third surface. The second light-incident surface and the fifth reflective surface are both located on the fourth surface. The fourth reflective surface is located on the sixth surface. The second light-exiting surface is located on the seventh surface. The light barrier is located near the third surface and near the intersection of the third and second surfaces.

[0035] It is understood that the prism in the above embodiment is generally composed of two prisms: the first optical lens is a roof-shaped prism, and the second optical lens is a trapezoidal prism. With this configuration, light enters through the first incident surface, is reflected sequentially by the first reflecting surface, the second reflecting surface, and the third reflecting surface, and then exits through the first exiting surface. The light emitted from the first exiting surface enters the second optical lens through the second incident surface, is reflected sequentially by the fourth reflecting surface and the fifth reflecting surface, and then exits through the second exiting surface.

[0036] In some embodiments that may include the above implementation, the light-blocking wall is further located near the second surface and near the intersection of the second surface and the first surface; and / or, the light-blocking wall is further located near the third surface and near the intersection of the third surface and the first surface; and / or, the light-blocking wall is further located near the fourth surface and near the intersection of the fourth surface and the seventh surface; and / or, the light-blocking wall is further located near the sixth surface and near the intersection of the sixth surface and the fifth surface; and / or, the light-blocking wall is further located near the sixth surface and near the intersection of the sixth surface and the seventh surface. This arrangement can further block stray light, thereby improving the imaging effect of the lens module.

[0037] In some embodiments that may include the above-described implementations, the light-incident surface includes a convex or concave curved surface; and / or, the light-exit surface includes a convex or concave curved surface. This configuration allows the prism to modulate light (e.g., converge or diverge), thereby simplifying the structure of the lens assembly.

[0038] In some embodiments that may include the above implementations, the prism is columnar, and its cross-section perpendicular to the center line is approximately parallelogram-shaped; that is, the prism is a parallelogram-shaped prism. There may be four ineffective optical regions, two of which may be located near the third surface and respectively near the first and second surfaces, and the remaining two may be located near the fourth surface and respectively near the first and second surfaces. Correspondingly, a light-blocking wall may be provided within at least one of the aforementioned ineffective optical regions.

[0039] In some embodiments that may include the above implementation, the prism is columnar, and its cross-section perpendicular to the center line is approximately triangular; that is, the prism is a triangular prism. There can be three ineffective optical regions, two of which are located near the first surface and respectively near the second and third surfaces, and the other is located near the third surface and near the intersection of the third and second surfaces. Correspondingly, a light-blocking wall can be provided within at least one of the aforementioned ineffective optical regions.

[0040] In some embodiments that may include the above implementation, the prism is a right-angle prism, and there may be three ineffective optical regions. Two of the ineffective optical regions are located near the first surface and respectively near the second and third surfaces, while the other ineffective optical region is located near the third surface and near the intersection of the third and second surfaces. Accordingly, a light barrier may be provided within at least one of the aforementioned ineffective optical regions.

[0041] In some embodiments that may include the above implementation, the prism is a pentaprism, and there may be three ineffective optical regions. Two of the ineffective optical regions are located near the first surface and respectively near the second and fifth surfaces, while the third ineffective optical region is located near the third surface and near the intersection of the third and second surfaces. Accordingly, a light barrier may be provided within at least one of the aforementioned ineffective optical regions.

[0042] Thirdly, embodiments of this application also provide a camera module, including: a lens assembly, an optical sensor, and a prism as described above, wherein the lens assembly, prism, and optical sensor are arranged along the optical axis. The camera module in this application includes the prism from any of the above embodiments, thus achieving the same technical effects and solving the same technical problems, and will not be elaborated further here.

[0043] Fourthly, embodiments of this application also provide an electronic device, including: a motherboard and a camera module as described above, wherein the camera module is electrically connected to the motherboard. The electronic device in this application includes the camera module from any of the above embodiments, and therefore can achieve the same technical effects and solve the same technical problems, which will not be elaborated further here.

[0044] Fifthly, embodiments of this application also provide a method for manufacturing an optical lens, comprising: providing a preform; forming a light-blocking wall inside the preform using a laser engraving process; the light-blocking wall having a light-blocking color and being free of cracks.

[0045] The optical lens manufactured by the optical lens manufacturing method in the embodiments of this application has a light blocking wall inside. The light blocking wall is used to block light and absorb stray light, so as to reduce or eliminate stray light in the light emitted from the light-emitting surface, thereby reducing or eliminating stray light.

[0046] In the above implementation, the light-blocking wall has a light-blocking color and is crack-free, meaning it is formed using a non-destructive process. It can be understood that "crack-free" means that under visible magnification, such as observation with an electron microscope with a precision of 20μm or 50μm, there are no obvious structural changes such as bubbles, cavities, or cracks within the light-blocking wall. This allows the optical lens to maintain good mechanical stability, preventing breakage and improving the reliability of the prism.

[0047] In some embodiments that may include the above implementations, the laser wavelength in the laser engraving process is 1030nm-1064nm, the laser pulse energy is 100-200mJ, and the laser scanning speed is 10mm / s. While ensuring high processing accuracy, the moderate laser energy avoids cracking caused by excessive energy.

[0048] In some embodiments that may include the above implementations, the laser used in the laser engraving process includes a femtosecond laser or a picosecond laser, which provides high processing precision.

[0049] In some embodiments that may include the above implementation, forming a light barrier inside a preform using a laser engraving process includes: repeatedly irradiating the interior of the preform with a laser to form multiple light spots, with adjacent light spots adjacent to or at least partially overlapping to form a light barrier. This arrangement, where multiple light spots are pieced together to form a light barrier, can reduce the energy of each laser irradiation, thereby preventing the optical lens from shattering.

[0050] In some embodiments that may include the above implementation, the width of the overlapping portion of adjacent light spots is half the width of the light spot. This ensures that the formed light barrier has a good light-blocking effect.

[0051] In some embodiments that may include the above implementations, forming a light barrier wall inside a preform using laser engraving includes: stacking multiple barrier layers inside the preform, with adjacent barrier layers connected or spaced apart; and / or, the number of barrier layers is greater than or equal to 10 layers; and / or, the thickness of the barrier layers is 100μm-300μm. This configuration improves the manufacturing precision of the barrier wall, thereby improving the manufacturing precision of the light barrier wall; furthermore, the moderate thickness of the barrier layers reduces the difficulty of the laser engraving process. Attached Figure Description

[0052] Figure 1 An exploded view of the electronic device provided in the embodiments of this application;

[0053] Figure 2 An axonometric view of an electronic device provided in an embodiment of this application;

[0054] Figure 3 Schematic diagram of the camera module provided in the embodiments of this application Figure 1 ;

[0055] Figure 4 Schematic diagram of the camera module provided in the embodiments of this application Figure 2 ;

[0056] Figure 5 The optical path of the prism provided in the embodiments of this application Figure 1 ;

[0057] Figure 6 The optical path of the prism provided in the embodiments of this application Figure 2 ;

[0058] Figure 7 A schematic diagram of the structure of an optical lens comprising multiple blocking layers provided in an embodiment of this application;

[0059] Figure 8a The cross-section of the light barrier in the optical lens provided in the embodiments of this application Figure 1 ;

[0060] Figure 8b The cross-section of the light barrier in the optical lens provided in the embodiments of this application Figure 2 ;

[0061] Figure 8c The cross-section of the light barrier in the optical lens provided in the embodiments of this application Figure 3 ;

[0062] Figure 8d The cross-section of the light barrier in the optical lens provided in the embodiments of this application Figure 4 ;

[0063] Figure 8eThe cross-section of the light barrier in the optical lens provided in the embodiments of this application Figure 5 ;

[0064] Figure 8f The cross-section of the light barrier in the optical lens provided in the embodiments of this application Figure 6 ;

[0065] Figure 8g The cross-section of the light barrier in the optical lens provided in the embodiments of this application Figure 7 ;

[0066] Figure 8h Cross-sectional view eight of the light-blocking wall in the optical lens provided in the embodiments of this application;

[0067] Figure 9 A schematic diagram of the optical lens including the atomization structure provided in the embodiments of this application;

[0068] Figure 10 A schematic diagram of the structure of the light-blocking wall in the optical lens provided in the embodiments of this application, including a light-shielding layer;

[0069] Figure 11 This application provides a schematic diagram of a structure in which multiple walls are formed in the light-blocking wall of an optical lens. Figure 1 ;

[0070] Figure 12 This application provides a schematic diagram of a structure in which multiple walls are formed in the light-blocking wall of an optical lens. Figure 2 ;

[0071] Figure 13 A schematic diagram of the structure of the light-blocking layer in the light-blocking wall of the optical lens provided in the embodiments of this application, including the light-blocking body. Figure 1 ;

[0072] Figure 14a A schematic diagram of the structure of the light-blocking layer in the light-blocking wall of the optical lens provided in the embodiments of this application, including the light-blocking body. Figure 2 ;

[0073] Figure 14b A schematic diagram of the structure of the light-blocking layer in the light-blocking wall of the optical lens provided in the embodiments of this application, including the light-blocking body. Figure 3 ;

[0074] Figure 15 This is a schematic diagram of the structure of the optical lens provided in the embodiments of this application, in which both the wall and the light-blocking layer are wavy.

[0075] Figure 16 A schematic diagram of the structure of the optical lens provided in this application, in which the light-blocking layer is wavy and the wall is rectangular;

[0076] Figure 17A schematic diagram of the structure of the optical lens provided in this application, in which the light-blocking layer is wavy and the wall is triangular;

[0077] Figure 18 This is a schematic diagram of the stepped-shaped wall structure in the optical lens provided in the embodiments of this application;

[0078] Figure 19 A schematic diagram of an optical lens provided in an embodiment of this application, showing that the light-incident surface and the light-exit surface are curved.

[0079] Figure 20 A schematic diagram of the structure of the prism provided in the embodiments of this application, including a first prism and a second prism. Figure 1 ;

[0080] Figure 21 The stray light path of the prism provided in the embodiments of this application Figure 1 ;

[0081] Figure 22 The stray light path of the prism provided in the embodiments of this application Figure 2 ;

[0082] Figure 23 A schematic diagram of the structure of the prism provided in the embodiments of this application, including a first prism and a second prism. Figure 2 ;

[0083] Figure 24 A schematic diagram of the structure of the prism provided in the embodiments of this application, including a first prism and a second prism. Figure 3 ;

[0084] Figure 25 The prism provided in this embodiment is a parallelogram prism. Figure 1 ;

[0085] Figure 26 The prism provided in this embodiment is a parallelogram prism. Figure 2 ;

[0086] Figure 27 The prism provided in this embodiment is a triangular prism. Figure 1 ;

[0087] Figure 28 The prism provided in this embodiment is a triangular prism. Figure 2 ;

[0088] Figure 29 The prism provided in this embodiment is a right-angle prism. Figure 1 ;

[0089] Figure 30 The prism provided in this embodiment is a right-angle prism. Figure 2 ;

[0090] Figure 31 The prism provided in the embodiments of this application is a pentaprism. Figure 1 ;

[0091] Figure 32 The prism provided in the embodiments of this application is a pentaprism. Figure 2 ;

[0092] Figure 33 This is a schematic diagram illustrating the formation of a light spot in the optical lens manufacturing method provided in the embodiments of this application;

[0093] Figure 34 This is a schematic diagram of the internal engraving equipment in the optical lens manufacturing method provided in the embodiments of this application.

[0094] Reference numerals in the attached drawings: 10: Mid-frame; 11: Back cover; 12: Display panel; 13: Main board; 20: Camera module; 21: Lens assembly; 22: Optical sensor; 30: Prism; 41: Light spot; 42: Laser; 43: Aperture; 44: Mirror; 45: Focusing lens; 46: Worktable; 47: Pre-fabricated part; 301: First surface; 302: Second surface; 303: Third surface; 304: Fourth surface; 305: Fifth surface; 306: Sixth surface; 307: Seventh surface; 310: Optical lens; 311: First optical lens; 312: Second optical lens Lens; 320: Light-incident surface; 321: First light-incident surface; 322: Second light-incident surface; 330: Light-exiting surface; 331: First light-exiting surface; 332: Second light-exiting surface; 340: Reflecting surface; 341: First reflecting surface; 342: Second reflecting surface; 343: Third reflecting surface; 344: Fourth reflecting surface; 345: Fifth reflecting surface; 350: Effective optical zone; 360: Ineffective optical zone; 370: Light-blocking wall; 371: Blocking layer; 372: Gap; 373: Wall; 374: Light-blocking layer; 375: Light-blocking body; 380: Fogging structure; 390: Light-shielding layer. Detailed Implementation

[0095] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0096] In the embodiments of this application, directional terms such as "up," "down," "left," "right," "horizontal," and "vertical" are defined relative to the positions of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0097] In the embodiments of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0098] In the embodiments of this application, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, an electrical connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0099] This application provides an electronic device, which may include a mobile phone, tablet computer, camera, etc. This application does not limit the scope of the electronic device. The following description uses a mobile phone as an example; however, it is understood that this application is not limited to this.

[0100] Please refer to Figure 1 and Figure 2 The electronic device includes a mid-frame 10, a back cover 11, and a display panel 12. The mid-frame 10 encloses an accommodating space, the display panel 12 covers one side of the mid-frame 10, and the back cover 11 covers the other side of the mid-frame 10 to enclose the accommodating space. The electronic device may also include a motherboard 13 and a battery. Both the motherboard 13 and the battery are disposed within the accommodating space. The motherboard 13 is electrically connected to the display panel 12 to control the display panel 12 to display images, and the battery is electrically connected to the motherboard 13 to supply power to the motherboard 13.

[0101] In some embodiments, the electronic device further includes a camera module 20 disposed within an accommodating space. The camera module 20 can be electrically connected to the motherboard 13 and is used to acquire external images.

[0102] like Figure 3As shown, in some implementations, the camera module 20 includes a lens assembly 21, an optical sensor 22, and a prism 30, which are arranged along the optical axis. In one example, the lens assembly 21 can be positioned between the prism 30 and the optical sensor 22. The prism 30 receives external light and guides it to the lens assembly 21. After passing through the lens assembly 21, the light illuminates the optical sensor 22 and forms an image on it. The optical sensor 22 can convert the light signal into an electrical signal and send it to the motherboard 13 (e.g., ...). Figure 1 As shown). Figure 4 As shown, in other examples, prism 30 can be positioned between lens assembly 21 and optical sensor 22, where optical sensor 22 acquires external light and guides the light to prism 30, which in turn guides the light to optical sensor 22 and can also form an image on optical sensor 22.

[0103] It is understood that the lens assembly 21 may include several convex lenses and several concave lenses, which are arranged along the optical axis. This application embodiment does not limit the number of convex and concave lenses included in the lens assembly 21; the number and position of the convex and concave lenses can be reasonably set according to actual needs.

[0104] In the above implementation, the prism 30 can adjust the direction and / or position of the light. It is understood that the prism 30 includes an incident surface, an exiting surface, and at least one reflecting surface. By appropriately setting the positions of the incident and exiting surfaces, as well as the position and number of reflecting surfaces, the direction and / or position of the light emitted from the exiting surface can be adjusted. For example, the light emitted from the exiting surface and the light incident from the incident surface can be parallel or have a certain angle.

[0105] It is understood that the prism 30 in the embodiments of this application can also be applied to other optical modules, such as telescopes.

[0106] In some examples, the camera module 20 may include a wide-angle camera and / or a telephoto camera, etc., and this application embodiment does not limit this. In implementations where the camera module 20 includes a telephoto camera, such as... Figure 3As shown, the lens assembly 21 is positioned between the prism 30 and the optical sensor 22. The light-incident surface of the prism 30 faces the rear area of ​​the phone, and the light-exit surface of the prism 30 is approximately parallel to the thickness direction of the phone. The optical axis of the lens assembly 21 is set parallel to the thickness direction of the phone. Light from the rear of the phone can be captured through the prism 30, and the light is bent at approximately 90° before being guided into the lens assembly 21. Because the optical axis of the lens assembly 21 is parallel to the thickness direction of the phone, the focal length of the camera module 20 is not affected by the thickness of the phone. This allows for an increase in the focal length of the lens module while maintaining a relatively constant phone thickness, ensuring that the camera module 20 can capture images from a greater distance.

[0107] Please refer to Figure 5 and Figure 6 In this embodiment, the prism 30 includes an optical lens 310, and correspondingly, the light-incident surface 320, the reflecting surface 340, and the light-exiting surface 330 are all disposed on the optical lens 310. The optical lens 310 has an effective optical area 350 and an ineffective optical area 360. The effective optical area 350 is the area through which the light required for the optical sensor 22 to acquire an image passes, while the ineffective optical area 360 is any other area on the optical lens 310 besides the effective optical area 350. During imaging, stray light rays propagate, are reflected, or refracted in the ineffective optical area 360 of the optical lens 310 before entering the optical sensor 22, adversely affecting the image quality. It is understood that the position of the ineffective optical area 360 within the prism 30 may differ depending on the camera module 20 or the specific optical requirements.

[0108] In this embodiment, the optical lens 310 is provided with a light barrier 370 inside. The light barrier 370 is used to block light and absorb stray light, thereby reducing or eliminating stray light contained in the light emitted from the light-emitting surface 330, thereby reducing or eliminating stray light received by the optical sensor 22, improving imaging quality, and thus improving the image quality acquired by the camera module 20.

[0109] It is understandable that, for any optical lens 310, the area where the light barrier 370 is located constitutes part of the ineffective optical zone 360 ​​of the optical lens 310.

[0110] In the above implementation, the light-blocking barrier 370 has a light-blocking color and is crack-free, meaning it is formed using a non-destructive process. It can be understood that "crack-free" means that under visible magnification, such as observation with an electron microscope with a precision of 20μm or 50μm, there are no obvious structural changes such as bubbles, cavities, or cracks within the light-blocking barrier 370. This allows the optical lens 310 to maintain good mechanical stability, preventing breakage and improving the reliability of the prism 30.

[0111] From another perspective, the absence of cracks within the light barrier 370 ensures that the structural density of the optical lens 310 does not change significantly after processing the light barrier 370, allowing the optical lens 310 to maintain good mechanical stability. For example, the ratio of the overall structural density of the optical lens 310 to the structural density of the light barrier 370 is greater than or equal to 97% and less than or equal to 103% (e.g., 97%, 100%, 103%, etc.). In some embodiments, the ratio of the overall structural density of the optical lens 310 to the structural density of the light barrier 370 is greater than or equal to 98% and less than or equal to 102% (e.g., 98%, 100%, 102%). This structural density can be obtained using standard density testing methods.

[0112] In some embodiments, the light barrier 370 can be formed by laser engraving, that is, by irradiating the interior of the optical lens 312 with a laser, a modified region is formed by locally modulating the interior of the optical lens 312, thus forming a non-destructive light barrier 370. In this process, the material in the laser-affected area of ​​the optical lens 310 is ionized to form electrons and holes, creating lattice distortion near the focal point. This distortion traps electrons / holes, changing the color of the area and forming the light barrier 370. Since the light barrier 370 is formed by distorting and trapping electrons / holes, its structure is physically indistinguishable from other areas of the optical lens 310 (such as the effective optical region 350), except for color differences. For example, under electron microscopes with 20μm or 50μm resolution, no obvious structural differences are usually visible; the difference is generally in the chemical bonds. This achieves non-destructive processing, and correspondingly, the non-destructive light barrier 370 typically also avoids physical damage such as bursting.

[0113] In some embodiments, the light barrier 370 can be processed using a femtosecond laser or a picosecond laser. The processing precision is in the sub-micron to nanometer range, offering high accuracy. In some examples, the laser engraving process can use a 1030nm wavelength laser with a pulse energy of 100-200mJ and a scanning speed of approximately 10mm / s. This ensures high processing precision while maintaining moderate laser energy, preventing cracking caused by excessive energy.

[0114] In related technologies, optical lenses incorporate light-blocking structures formed through laser engraving. However, these structures are typically created due to the thermal effect of the laser on the material, making them inherently destructive. This means the optical lens at the light-blocking structure often suffers physical damage, such as microcracks or bubbles. This leads to cracks forming around the light-blocking structure, resulting in poor reliability of the optical lens. Such light-blocking structures are usually whitish and difficult to blacken, resulting in mediocre light-blocking performance. Furthermore, the lasers used to process these structures are typically nanosecond or continuous lasers, with processing precision usually at the micrometer level.

[0115] In this embodiment, the optical lens 310 has a light-blocking wall 370 inside. The light-blocking wall 370 has a light-blocking color and is free of cracks. This ensures that the structural density of the optical lens 310 does not change significantly after the light-blocking wall 370 is processed, and the optical lens 310 can maintain good mechanical stability, avoiding breakage and improving the reliability of the prism 30.

[0116] In some embodiments, the light barrier 370 extends from the outer surface of the optical lens 310 toward the interior of the optical lens 310. In other embodiments, the light barrier 370 is spaced apart from the outer surface of the optical lens 310; in other words, the light barrier 370 is entirely located inside the optical lens 310.

[0117] In the above implementation, the light barrier 370 has a light-blocking color, which can improve the light-blocking effect of the light barrier 370, further reduce stray light in the light emitted from the light-emitting surface 330, and further improve the imaging effect of the camera module 20.

[0118] This application does not limit the color of the light-blocking material. For example, the light-blocking color may include black or brown. Black or brown has stronger light absorption capabilities and can improve the absorption effect of stray light. Of course, the light-blocking color in this application embodiment may also be other colors, such as purple or yellow.

[0119] In the method of forming the light barrier 370 through laser engraving, the optical lens 310 is made of glass containing oxides. The color of the light barrier corresponds to the oxides; that is, during the laser engraving process of forming the light barrier 370, the oxides determine the color of the light barrier 370. By including oxides within the glass, the light barrier 370 can have a certain light-blocking color, thereby improving the absorption effect of stray light.

[0120] It is understandable that different oxides result in different light-blocking colors in the light-blocking barrier 370. By making a reasonable choice of oxide, the light-blocking barrier 370 can have a specific light-blocking color.

[0121] For example, the oxide may include at least one of boron oxide, titanium oxide, barium oxide, lanthanide oxide, and rubidium oxide. In some examples, the light-blocking color of the light-blocking wall 370 formed when the oxide is boron oxide may be brown, and the light-blocking color of the light-blocking wall 370 formed when the oxide is a titanium oxide may be black.

[0122] Understandably, titanium oxides are a class of oxide materials with titanium as the main component, such as titanium monoxide and titanium dioxide. Barium oxides are a class of oxide materials with barium as the main component, such as barium oxide. Lanthanide oxides are a class of oxide materials with lanthanide elements (from lanthanum to lutetium in the periodic table) as the main component, such as lanthanum oxide, cerium oxide, and praseodymium oxide. Rubidium oxides are a class of oxide materials with rubidium as the main component, such as rubidium oxide and rubidium peroxide.

[0123] In the above implementation, the color depth of the light barrier 370 is related to its thickness (depth). Figure 5 Taking the indicated orientation as an example, the thickness refers to the vertical dimension; the thicker the thickness, the darker the color. The color of the light barrier 370 is also related to the degree of local modulation; the more times the same location is modulated with laser, the darker the color at that location becomes.

[0124] In some embodiments, the content of the oxide component can be greater than or equal to 5% (e.g., 5%, 10%, 20%, etc.). In this case, the light barrier 370 can have a darker color and a better light-blocking effect. In some examples, the content of the oxide component can be greater than or equal to 10% (e.g., 10%, 20%, 30%, etc.) to further improve the light-blocking effect of the light barrier 370.

[0125] In some embodiments, the refractive index of the optical lens 310 is 1.49-2.1 (e.g., 1.49, 2, 2.1, etc.), which ensures that the prism 30 has good optical performance.

[0126] Please refer to Figure 7 In the figure, the vertical direction represents the thickness direction of the light-blocking wall 370. In some embodiments, the light-blocking wall 370 includes multiple stacked blocking layers 371, with adjacent blocking layers 371 connected or spaced apart. The thickness of the light-blocking wall 370 is related to the number of blocking layers 371; the more blocking layers 371, the thicker the light-blocking wall 370. Through this arrangement, multiple blocking layers 371 form the light-blocking wall 370, ensuring that the light-blocking wall 370 has sufficient depth, thereby improving the absorption effect on stray light.

[0127] It is understandable that when creating the light barrier 370 using laser engraving, a barrier layer 371 is formed at the same depth by laser irradiation. Then, the depth of laser irradiation is adjusted to form another barrier layer 371 at a different depth, and so on, within the optical lens 312 (e.g., ...). Figure 5 Multiple blocking layers 371 are formed within the non-effective optical region 360 shown. In a plane perpendicular to the depth direction, the projections of adjacent blocking layers 371 may at least partially overlap.

[0128] In some implementations, the number of blocking layers 371 is greater than or equal to 10 (such as 10, 20, 30, etc.). With this setting, the light barrier 370 has a certain thickness, which makes the transmittance of the light barrier 370 low. For example, the transmittance can be reduced to below 0.3%, thereby having a good light blocking effect.

[0129] In some examples, the number of blocking layers 371 can range from 10 to 20 (e.g., 10, 15, 20 layers, etc.). In this case, the light barrier 370 can meet the requirements of low transmittance and high processing efficiency.

[0130] In some embodiments, the thickness of the barrier layer 371 is 100μm-300μm (e.g., 100μm, 200μm, 300μm, etc.). This setting can improve the manufacturing precision of the barrier layer 371, thereby improving the manufacturing precision of the light barrier 370; in addition, the moderate thickness of the barrier layer 371 also reduces the difficulty of the laser engraving process.

[0131] In some embodiments, a plurality of blocking layers 371 are stacked along the depth direction of the light blocking wall 370, and the depth direction of the light blocking wall 370 and the stray light rays in the optical lens 310 have a preset angle A (e.g., ...). Figure 6 (As shown). This arrangement also prevents the depth direction of the light barrier 370 from being parallel to the stray light rays, thereby preventing stray light rays from passing between adjacent barrier layers 371 and thus improving the light-blocking effect.

[0132] For example, the preset angle A can be from 170° to 10° (such as 170°, 90°, 60°, 10°, etc.). The depth direction of the light barrier 370 has a sufficient angle with the stray light rays to ensure the light blocking effect.

[0133] In some embodiments, the light barrier 370 has a triangular cross-sectional shape along its thickness direction (e.g., Figure 8a As shown), rectangle (as shown) Figure 8b As shown), stepped (as shown) Figure 8c As shown), wavy (as shown) Figure 8d As shown), circular (as shown) Figure 8eAt least one of (as shown). It is understood that the light barrier 370 is along the direction perpendicular to the depth (as shown). Figure 5 The light barrier (perpendicular to the plane of the paper) can extend in a roughly columnar shape to enhance the light-blocking effect. Of course, the light barrier 370 can also be in other shapes, for example, in some examples, such as... Figure 8f As shown, the light barrier 370 has a roughly triangular cross-sectional shape along its thickness direction, and this cross-section is truncated by a plurality of slits 372 spaced apart along the depth direction; in other examples, such as Figure 8g , Figure 8h As shown, the light barrier 370 has a generally rectangular cross-sectional shape parallel to and perpendicular to the thickness direction, and the cross-section is cut off by a plurality of slits 372 spaced apart along the depth direction, or the cross-section is cut off by a plurality of slits 372 spaced apart along the depth direction perpendicular to the thickness direction; in other examples, the light barrier 370 may also extend in a spiral shape along the perpendicular thickness direction.

[0134] It is understandable that the light barrier 370 includes multiple barrier layers 371 stacked together (such as...). Figure 7 In the implementation shown, the shape of the light barrier 370 can be adjusted by setting the position and / or size of each blocking layer 371.

[0135] Please refer to Figure 9 , Figure 9 The light rays shown are non-stray light, which can be either central or non-central rays. In some embodiments, a fogging structure 380 is provided on the surface of the optical lens 310 near the light barrier 370. The fogging structure 380 may include a rough matte surface or a non-glossy surface. Exemplarily, the fogging structure 380 can be formed by a chemical fogging process, a physical fogging process, or an optical fogging process. With the above configuration, the fogging structure 380 can prevent external stray light from entering the optical lens 310, and at the same time, the fogging structure 380 can further absorb stray light within the optical lens 310, thereby improving the imaging effect of the camera module 20.

[0136] Please refer to Figure 10 In some embodiments, a light-shielding layer 390 is applied to the surface of the optical lens 310 near the light barrier 370. For example, the light-shielding layer 390 may include light-shielding ink. This configuration prevents stray light from entering the optical lens 310, while also absorbing stray light within the optical lens 310, thus improving the imaging effect of the camera module 20.

[0137] In some embodiments, an atomizing structure 380 and a light-shielding layer 390 are provided on the surface of the optical lens 310 near the light-blocking wall 370. The light-shielding layer 390 covers the atomizing structure 380. This arrangement can further prevent external stray light from entering the optical lens 310, while further absorbing stray light inside the optical lens 310.

[0138] Please refer to Figure 11 and Figure 12 In this application embodiment, the shape of the prism 30 is not limited. In some implementations, the prism 30 can be cylindrical, that is, the optical lens 310 is cylindrical. The cross section of the optical lens 310 along the direction perpendicular to the center line is approximately trapezoidal. Correspondingly, the light-incident surface 320 and the light-exit surface 330 can be arranged alternately on the first surface 301 corresponding to the lower base of the trapezoid. The second surfaces 302 corresponding to the two waists of the trapezoid are both provided with reflective surfaces 340. At this time, the non-effective optical area 360 is arranged close to the third surface 303 corresponding to the upper base of the trapezoid.

[0139] In this case, the upper base of the trapezoid is the longer base, and the lower base is the shorter base.

[0140] With the above configuration, the cross-section of the prism 30 is roughly trapezoidal. The prism 30 is a boat-shaped prism. The prism 30 can bend light by 180°, that is, the light rays entering through the light-incident surface 320 and the light rays exiting through the light-outcident surface 330 are in opposite directions.

[0141] In some embodiments, the light-blocking wall 370 includes a wall 373 and a light-blocking layer 374, with the light-blocking layer 374 disposed between the wall 373 and the third surface 303. On the third surface 303, the projected area of ​​the wall 373 is smaller than the projected area of ​​the light-blocking layer 374; that is, the light-blocking layer 374 extends in a direction parallel to the third surface 303 to cover a larger area, while the wall 373 extends in a direction perpendicular to the third surface 303 (depth direction). In some examples, the size of the wall 373 is larger than the size of the light-blocking layer 374 in the direction perpendicular to the third surface 303. It is understood that both the wall 373 and the light-blocking layer 374 can be formed by laser engraving. With the above configuration, both the light-blocking layer 374 and the wall 373 can achieve light blocking, further absorbing stray light and improving the imaging effect of the camera module 20.

[0142] In some implementations, there are multiple walls 373, and the projections of these multiple walls 373 onto the third surface 303 are spaced apart. This arrangement can further improve the absorption effect of stray light. It is understood that the depths of the multiple walls 373 can be the same or different along the direction perpendicular to the third surface 303, and this embodiment does not impose any restrictions on this.

[0143] In some implementations, the light-blocking layer 374 can be plate-shaped. Please refer to [reference needed]. Figure 13 In other implementations, the light-blocking layer may also include multiple light-blocking bodies 375, and the multiple light-blocking bodies 375 are arranged in a projection array on the third surface 303; that is, the multiple light-blocking bodies 375 constitute a microstructure, and the absorption of stray light can also be achieved through the microstructure, thus playing the role of blocking light.

[0144] Please refer to Figure 14a In the implementation of the optical lens 310, the atomizing structure 380 can be disposed on the third surface 303. Please refer to... Figure 14b In the implementation of the optical lens 310 including the light-shielding layer 390, the light-shielding layer 390 is also disposed on the third surface 303. This is to further block light and thereby eliminate stray light.

[0145] In this embodiment, the shapes of the wall 373 and the light-blocking layer 374 can be the same or different, such as... Figure 15 As shown, along the depth direction, the cross-sections of both wall 373 and light-blocking layer 374 can be wavy. For example... Figure 16 As shown, along the depth direction, the cross-section of wall 373 is rectangular with gaps, and the cross-section of light-blocking layer 374 is wavy. (See diagram below.) Figure 17 As shown, along the depth direction, the cross-section of wall 373 is triangular, and the cross-section of light-blocking layer 374 is wavy. Figure 18 As shown, along the depth direction, the cross-section of the wall 373 is stepped, and the cross-section of the light-blocking layer 374 is rectangular.

[0146] Please refer to Figure 19 , Figure 19 The light rays shown in the diagram are non-stray light rays, which can be central rays or non-central rays. In the above embodiment, the light-incident surface 320 includes a convex or concave curved surface. This configuration allows the prism 30 to adjust the light rays (such as converging or diverging), thereby simplifying the structure of the lens assembly 21.

[0147] In some implementations, the light-emitting surface 330 includes a convex or concave curved surface, which allows the prism 30 to further adjust the light.

[0148] It is understood that the shape and focal length of the light-incident surface 320 and the light-exit surface 330 can be reasonably set according to the lens assembly 21 to meet optical requirements. The embodiments of this application do not limit this.

[0149] Please refer to Figure 20 , Figure 20The light rays shown are non-stray light rays, which can be central rays or non-central rays. In other embodiments, the prism 30 includes a first optical lens 311 and a second optical lens 312. Both the first optical lens 311 and the second optical lens 312 are columnar, and their center lines are parallel. The first optical lens 311 is triangular prism-shaped and includes a first surface 301, a second surface 302, a third surface 303, a first light-incident surface 321, a first reflective surface 341, a second reflective surface 342, a third reflective surface 343, and a first light-exiting surface 331, all parallel to the center line. The first light-incident surface 321 and the third reflective surface 343 are both disposed on the first surface 301, the second reflective surface 342 is disposed on the second surface 302, and the first light-exiting surface 331 and the third reflective surface 343 are both disposed on the third surface 303.

[0150] The second optical lens 312 includes a fourth surface 304, a fifth surface 305, a sixth surface 306, a seventh surface 307, a second light-incident surface 322, a fourth reflective surface 344, a fifth reflective surface 345, and a second light-emitting surface 332, all arranged parallel to the center line. The fourth surface 304 and the sixth surface 306 are located between the fifth surface 305 and the seventh surface 307. The fourth surface 304 faces the third surface 303. The second light-incident surface 322 and the fifth reflective surface 345 are both disposed on the fourth surface 304. The fourth reflective surface 344 is disposed on the sixth surface 306. The second light-emitting surface 332 is disposed on the seventh surface 307. With the above configuration, after the light enters through the first light-incident surface 321, it is reflected in sequence by the first reflecting surface 341, the second reflecting surface 342, and the third reflecting surface 343, and then exits through the first light-exiting surface 331. The light emitted from the first light-exiting surface 331 enters the second optical lens 312 through the second light-incident surface 322, and is reflected in sequence by the fourth reflecting surface 344 and the fifth reflecting surface 345, and then exits through the second light-exiting surface 332.

[0151] It is understood that the prism 30 in the above embodiments is generally composed of two prisms 30, with the first optical lens 311 being a roof-shaped prism and the second optical lens 312 being a trapezoidal prism. The third surface 303 and the fourth surface 304 can be spaced apart, and of course, the third surfaces 303 can also be attached to each other; this application embodiment does not limit this.

[0152] In some embodiments, the optical path of a stray light can be as follows: Figure 21As shown, after stray light enters the first optical lens 311, it passes through the third surface 303 in sequence, and is reflected by the second surface 302 near the intersection of the third surface 303 and the second surface 302. After being reflected by the second surface 302, it is reflected again by the third surface 303, and then reflected by the first surface 301 near the intersection of the first surface 301 and the third surface 303 towards the first light-emitting surface 331. It then enters the second optical lens 312, and after being reflected by the fourth reflective surface 344 and the fourth surface 304, it is emitted from the second light-emitting surface 332. Since the positions near the third surface 303 and near the intersection of the third surface 303 and the first surface 301, as well as the positions near the third surface 303 and near the intersection of the third surface 303 and the second surface 302, are all outside the effective optical area in the optical path of the stray light, the ineffective optical area 360 of the prism 30 can be located near the third surface 303 and near the intersection of the third surface 303 and the first surface 301, as well as near the third surface 303 and near the intersection of the third surface 303 and the second surface 302. Accordingly, a light barrier 370 can be provided in at least one of the aforementioned ineffective optical areas 360.

[0153] In some embodiments, the optical path of a stray light can be as follows: Figure 22 As shown, stray light enters the first optical lens 311, then enters the second optical lens 312 near the intersection of the third surface 303 and the first surface 301. After being reflected by the sixth surface 306 and the seventh surface 307, it is reflected again near the intersection of the fourth surface 304 and the seventh surface 307, and then exits from the second light-emitting surface 332. Since the positions near the intersection of the third surface 303 and the first surface 301, and near the intersection of the fourth surface 304 and the seventh surface 307, are outside the effective optical area, the ineffective optical area 360 of the prism 30 is the positions near the intersection of the third surface 303 and the first surface 301, and near the intersection of the fourth surface 304 and the seventh surface 307.

[0154] Please refer to Figure 23 , Figure 23The light rays illustrated are non-stray light rays, which can be central or non-central rays. In other embodiments, the ineffective optical region 360 is also located near the second surface 302 and near the intersection of the second surface 302 and the first surface 301; and / or, the ineffective optical region 360 is also located near the sixth surface 306 and near the intersection of the sixth surface 306 and the fifth surface 305; and / or, the ineffective optical region 360 is also located near the sixth surface 306 and near the intersection of the sixth surface 306 and the seventh surface 307. Accordingly, a light barrier 370 can be provided within at least one of the aforementioned ineffective optical regions 360. This arrangement can further block stray light, thereby improving the imaging effect of the lens module.

[0155] Please refer to Figure 24 In the above embodiments, the first light-incident surface 321 includes a curved surface that is convex or concave. This configuration allows the prism 30 to adjust the light (such as converging or diverging), thereby simplifying the structure of the lens assembly 21.

[0156] In some implementations, the second light-emitting surface 332 includes a convex or concave curved surface, which allows the prism 30 to further adjust the light.

[0157] Please refer to Figure 25 , Figure 25 The light rays shown are non-stray light rays, which can be central or non-central rays. In other embodiments, the prism 30 is columnar, and its cross-section perpendicular to the center line is approximately parallelogram-shaped; that is, the prism 30 is a parallelogram-shaped prism. Accordingly, the prism 30 includes a first surface 301, a second surface 302, a third surface 303, and a fourth surface 304 parallel to the center line. The first surface 301 and the second surface 302 are arranged opposite each other, and the third surface 303 and the fourth surface 304 are located between the first surface 301 and the fourth surface 304. The light-incident surface 320 can be disposed on the first surface 301, and the light-exiting surface 330 can be disposed on the second surface 302. Reflecting surfaces 340 are disposed on both the third surface 303 and the fourth surface 304. Accordingly, after the light enters through the light-incident surface 320, it is reflected sequentially on the two reflecting surfaces 340 and then exits through the light-exiting surface 330.

[0158] In the above implementation, the ineffective optical regions 360 may include four, of which two ineffective optical regions 360 may be disposed near the third surface 303 and respectively located near the first surface 301 and the second surface 302, and the remaining two ineffective optical regions 360 may be disposed near the fourth surface 304 and respectively located near the first surface 301 and the second surface 302. Accordingly, a light barrier 370 may be disposed within at least one of the ineffective optical regions 360.

[0159] Please refer to Figure 26 In the implementation of the prism 30 as a parallelogram prism 30, the light-incident surface 320 is provided with a convex or concave curved surface. Similarly, the light-exit surface 330 can also be provided with a convex or concave curved surface to adjust the light.

[0160] Please refer to Figure 27 , Figure 27 The light ray shown is non-stray light, which can be a central ray or a non-central ray. In other embodiments, the prism 30 is columnar, and its cross-section perpendicular to the center line is approximately triangular, i.e., the prism 30 is a triangular prism. Accordingly, the prism 30 includes a first surface 301, a second surface 302, and a third surface 303 parallel to the center line. One end of the first surface 301 is connected to one end of the second surface 302 and one end of the third surface 303, and the other end of the second surface 302 is connected to the other end of the third surface 303. The included angle between the first surface 301 and the third surface 303 is an obtuse angle, and the included angles between the second surface 302 and the first surface 301 and the third surface 303 are both acute angles. The light-incident surface 320 can be disposed on the first surface 301, the first reflecting surface 341 and the light-exiting surface 330 are both disposed on the second surface 302, and the second reflecting surface 342 is disposed on the third surface 303. After the light enters through the light-incident surface 320, it is reflected in sequence by the first reflecting surface 341 and the second reflecting surface 342, and then exits through the light-exiting surface 330.

[0161] In the above implementation, there can be three ineffective optical regions 360. Two of the ineffective optical regions 360 are located near the first surface 301 and respectively near the second surface 302 and the third surface 303. The other ineffective optical region 360 is located near the third surface 303 and near the intersection of the third surface 303 and the second surface 302. Accordingly, a light barrier 370 can be provided in at least one of the ineffective optical regions 360.

[0162] Please refer to Figure 28 In the implementation of the prism 30 as a triangular prism 30, the light-incident surface 320 is provided with a convex or concave curved surface. Similarly, the light-exit surface 330 can also be provided with a convex or concave curved surface to adjust the light.

[0163] Please refer to Figure 29 , Figure 29The light rays shown are non-stray light rays, which can be central or non-central rays. In other embodiments, prism 30 is a right-angle prism, and correspondingly, prism 30 is cylindrical, with a cross-section perpendicular to the center line that is approximately a right-angled triangle. Prism 30 includes a first surface 301, a second surface 302, and a third surface 303 parallel to the center line. One end of the first surface 301 is connected to one end of the second surface 302 and one end of the third surface 303, and the other end of the second surface 302 is connected to the other end of the third surface 303. The angle between the first surface 301 and the third surface 303 is a right angle, and the angles between the second surface 302 and the first surface 301 and the third surface 303 are both acute angles. The light-incident surface 320 can be disposed on the first surface 301, the reflecting surface 340 can be disposed on the second surface 302, and the light-exiting surface 330 can be disposed on the third surface 303. Light rays enter through the light-incident surface 320, are reflected by the reflecting surface 340, and exit through the light-exiting surface 330.

[0164] In the above implementation, there can be three ineffective optical regions 360. Two of the ineffective optical regions 360 are located near the first surface 301 and respectively near the second surface 302 and the third surface 303. The other ineffective optical region 360 is located near the third surface 303 and near the intersection of the third surface 303 and the second surface 302. Accordingly, a light barrier 370 can be provided in at least one of the ineffective optical regions 360.

[0165] Please refer to Figure 30 In the implementation of the prism 30 as a right-angled prism 30, the light-incident surface 320 is provided with a convex or concave curved surface. Similarly, the light-exit surface 330 can also be provided with a convex or concave curved surface to adjust the light.

[0166] Please refer to Figure 31 , Figure 31 The light rays shown are non-stray light rays, which can be central rays or non-central rays. In other embodiments, prism 30 is a pentaprism, and correspondingly, prism 30 is columnar, with a cross-section perpendicular to the center line that is approximately pentagonal. Prism 30 includes a first surface 301, a second surface 302, a third surface 303, a fourth surface 304, and a fifth surface 305 parallel to the center line, which are connected sequentially. The light-incident surface 320 can be disposed on the first surface 301, the first reflecting surface 341 on the third surface 303, the second reflecting surface 342 on the fifth surface 305, and the light-exiting surface 330 on the second surface 302.

[0167] In the above implementation, there can be three ineffective optical regions 360. Two of the ineffective optical regions 360 are located near the first surface 301 and respectively near the second surface 302 and the fifth surface 305. The other ineffective optical region 360 is located near the third surface 303 and near the intersection of the third surface 303 and the second surface 302. Accordingly, a light barrier 370 can be provided in at least one of the ineffective optical regions 360.

[0168] Please refer to Figure 32 In the implementation of the prism 30 as a pentaprism 30, the light-incident surface 320 is provided with a convex or concave curved surface. Similarly, the light-exit surface 330 can also be provided with a convex or concave curved surface to adjust the light.

[0169] This application also provides a method for manufacturing an optical lens, which can be used to manufacture the optical lens in any of the above embodiments.

[0170] The method includes:

[0171] S101: Provide prefabricated components.

[0172] The preform can be in a regular shape such as a plate or column, or it can be in other irregular shapes. In the implementation of optical lenses as prisms, the shape of the preform can be set according to the shape of the prism.

[0173] The optical lens manufacturing method provided in this application also includes:

[0174] S102: A light-blocking wall is formed inside the precast component using laser engraving technology; the light-blocking wall has a light-blocking color and is free of cracks.

[0175] The optical lens manufactured by the optical lens manufacturing method in the embodiments of this application has a light-blocking wall inside. The light-blocking wall is used to block light and absorb stray light, so as to reduce or eliminate stray light in the light emitted from the light-emitting surface, thereby reducing or eliminating stray light.

[0176] In the above implementation, the light-blocking wall has a light-blocking color and is crack-free, meaning it is formed using a non-destructive process. It can be understood that "crack-free" means that under visible magnification, such as observation with an electron microscope with a precision of 20μm or 50μm, there are no obvious structural changes such as bubbles, cavities, or cracks within the light-blocking wall. This allows the optical lens to maintain good mechanical stability, preventing breakage and improving the reliability of the prism.

[0177] In the above implementation, the light barrier is formed using a laser engraving process. This means that the interior of a prefabricated component is irradiated with a laser to modulate a localized area, creating a modified region and thus forming a non-destructive light barrier. Specifically, the material in the laser-affected area of ​​the optical lens is ionized, forming electrons and holes, and creating lattice distortion near the focal point. This distortion traps electrons / holes, changing the color of that area and forming the light barrier. Since the light barrier is formed by distorting and trapping electrons / holes, its structure is physically indistinguishable from other areas of the optical lens (such as the effective optical area), except for color differences. For example, under electron microscopes with 20μm or 50μm resolution, no obvious structural differences are usually visible; the difference is generally in the chemical bonds. This achieves non-destructive processing, and correspondingly, the non-destructive light barrier typically also avoids physical damage such as burst points.

[0178] In some embodiments, the light barrier can be processed using femtosecond or picosecond lasers, achieving high processing precision ranging from submicron to nanometer levels. In some examples, the laser engraving process can utilize a 1030nm wavelength laser with a pulse energy of 100-200mJ and a scanning speed of approximately 10mm / s. This ensures high processing precision while maintaining moderate laser energy, preventing cracking caused by excessive energy.

[0179] like Figure 33 As shown, in some embodiments, forming a light barrier inside the preform using a laser engraving process includes: repeatedly irradiating the interior of the preform with a laser to form multiple light spots 41, with adjacent light spots 41 being adjacent or at least partially overlapping to form a light barrier 370. This arrangement, where multiple light spots 41 are joined together to form a light barrier, reduces the energy of each laser irradiation, thereby preventing the optical lens from shattering.

[0180] In some implementations, the width (L1-L2) of the overlapping portion of adjacent light spots 41 is approximately half the width L2 of light spot 41. This ensures that the formed light barrier 370 has a good light-blocking effect.

[0181] For example, the following can be adopted: Figure 34 The internal engraving device shown performs laser internal engraving. The internal engraving device may include a laser 42, an aperture 43, a reflector 44, a focusing lens 45, and a worktable 46. During internal engraving, the preform 47 is first installed on the worktable 46, and then the laser 42 emits laser pulses. The laser pulses are sequentially irradiated onto the preform 47 through the aperture 43, the reflector 44, and the focusing lens 45 to form a light barrier 370 inside the preform 47.

[0182] like Figure 7As shown, in some embodiments, forming a light-blocking wall 370 inside the preform using a laser engraving process includes: stacking multiple blocking layers 371 inside the preform, with adjacent blocking layers 371 connected or spaced apart. The thickness of the light-blocking wall 370 is related to the number of blocking layers 371; the more blocking layers 371, the thicker the light-blocking wall 370. Through this arrangement, multiple blocking layers 371 form the light-blocking wall 370, ensuring sufficient depth and thus improving the absorption of stray light.

[0183] It is understandable that when creating the light barrier 370 using laser engraving technology, multiple light spots 41 are formed at the same depth by laser irradiation (e.g., Figure 33 As shown, a barrier layer 371 is formed by adjusting the depth of laser irradiation to form another barrier layer 371 at a different depth, and so on, to form a plurality of stacked barrier layers 371 inside the preform. In a plane perpendicular to the depth direction, the projections of adjacent barrier layers 371 may at least partially overlap.

[0184] In some implementations, the number of blocking layers 371 is greater than or equal to 10 (such as 10, 20, 30, etc.). With this setting, the light barrier 370 has a certain thickness, which makes the transmittance of the light barrier 370 low. For example, the transmittance can be reduced to below 0.3%, thereby having a good light blocking effect.

[0185] In some examples, the number of blocking layers 371 can be in the range of 10 to 20 layers (e.g., 10, 15, 20 layers, etc.). In this case, the light barrier 370 can meet the requirements of low transmittance and high processing efficiency.

[0186] In some embodiments, the thickness of the barrier layer 371 is 100μm-300μm (100μm, 200μm, 300μm, etc.). This setting can improve the manufacturing precision of the barrier wall, thereby improving the manufacturing precision of the light barrier wall 370; in addition, the moderate thickness of the barrier layer 371 also reduces the difficulty of the laser engraving process.

[0187] In some embodiments, the positional accuracy of a single blocking layer 371 is better than 0.02 mm, which can improve the positional accuracy of the blocking layer 371 and thus ensure the positional accuracy of the light barrier.

[0188] The above description is merely a specific implementation of the embodiments of this application, but the protection scope of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. An optical lens, characterized in that, include: The optical lens has a light-blocking wall inside, the light-blocking wall has a light-blocking color, and the light-blocking wall is free of cracks.

2. The optical lens according to claim 1, characterized in that, The optical lens is made of glass, which contains oxides, and the color of the light-blocking wall corresponds to the oxides.

3. The optical lens according to claim 2, characterized in that, The oxides include at least one of boron oxide, titanium oxide, barium oxide, lanthanide oxide, and rubidium oxide.

4. The optical lens according to claim 2 or 3, characterized in that, The content of the oxide is greater than or equal to 5%.

5. The optical lens according to any one of claims 2-4, characterized in that, The light barrier may be black or brown.

6. The optical lens according to any one of claims 1-5, characterized in that, The refractive index of the optical lens is 1.49-2.

1.

7. The optical lens according to any one of claims 1-6, characterized in that, The light barrier includes multiple stacked blocking layers, with adjacent blocking layers connected or spaced apart; and / or, the number of blocking layers is greater than or equal to 10; and / or, the thickness of the blocking layer is 100μm-300μm.

8. The optical lens according to claim 7, characterized in that, Multiple blocking layers are stacked along the depth direction of the light barrier, and the depth direction of the light barrier has a preset angle with the stray light rays in the optical lens.

9. The optical lens according to claim 8, characterized in that, The preset included angle is 170° to 10°.

10. The optical lens according to any one of claims 1-9, characterized in that, The cross-sectional shape of the light barrier along its thickness direction is at least one of the following: triangular, rectangular, stepped, wavy, and annular.

11. The optical lens according to any one of claims 1-10, characterized in that, A frosting structure is provided on the surface of the optical lens near the light barrier.

12. The optical lens according to any one of claims 1-11, characterized in that, The optical lens has a light-shielding layer covering the surface near the light barrier.

13. A prism, characterized in that, The optical lens includes any one of claims 1-12, wherein the optical lens is provided with an incident light surface, an exit light surface and at least one reflecting surface, and the prism is used to adjust the direction and / or position of the light.

14. The prism according to claim 13, characterized in that, The optical lens is cylindrical with a trapezoidal cross-section. The light-incident surface and the light-exit surface are spaced apart on the first surface corresponding to the lower base of the trapezoid. The second surfaces corresponding to the two waists of the trapezoid are provided with the reflective surface. The light-blocking wall is located near the third surface corresponding to the upper base of the trapezoid.

15. The prism according to claim 14, characterized in that, The light-blocking wall includes a wall body and a light-blocking layer, wherein the light-blocking layer is disposed between the wall body and the third surface; on the third surface, the projected area of ​​the wall body is smaller than the projected area of ​​the light-blocking layer.

16. The prism according to claim 15, characterized in that, The wall consists of multiple walls, and the projections of the multiple walls on the third surface are spaced apart.

17. The prism according to claim 15 or 16, characterized in that, The light-blocking layer includes multiple light-blocking bodies, and the projection array of the multiple light-blocking bodies is arranged on the third surface.

18. The prism according to claim 13, characterized in that, The prism includes a first optical lens and a second optical lens, both of which are cylindrical in shape and have parallel centerlines. The first optical lens is triangular prism-shaped and includes a first light-incident surface, a second surface, a third surface, a first light-reflecting surface, a first reflecting surface, a second reflecting surface, a third reflecting surface, and a first light-emitting surface, all parallel to the centerline. The first light-incident surface and the third reflecting surface are both disposed on the first surface, the second reflecting surface is disposed on the second surface, and the first light-emitting surface and the third reflecting surface are both disposed on the third surface. The second optical lens includes a fourth surface, a fifth surface, a sixth surface, a seventh surface, a second light-incident surface, a fourth reflective surface, a fifth reflective surface, and a second light-emitting surface, all arranged parallel to the center line. The fourth surface and the sixth surface are located between the fifth surface and the seventh surface. The fourth surface faces the third surface. The second light-incident surface and the fifth reflective surface are both disposed on the fourth surface. The fourth reflective surface is disposed on the sixth surface. The second light-emitting surface is disposed on the seventh surface. The light barrier is located near the third surface and near the intersection of the third surface and the second surface.

19. The prism according to claim 18, characterized in that, The light-blocking wall is also located near the second surface and near the intersection of the second surface and the first surface; and / or, the light-blocking wall is also located near the third surface and near the intersection of the third surface and the first surface; and / or, the light-blocking wall is also located near the fourth surface and near the intersection of the fourth surface and the seventh surface; and / or, the light-blocking wall is also located near the sixth surface and near the intersection of the sixth surface and the fifth surface; and / or, the light-blocking wall is also located near the sixth surface and near the intersection of the sixth surface and the seventh surface.

20. The prism according to any one of claims 13-19, characterized in that, The light-incident surface includes a convex curved surface or a concave curved surface; and / or, the light-exiting surface includes a convex curved surface or a concave curved surface.

21. A camera module, characterized in that, It includes: a lens assembly, an optical sensor, and a prism as described in any one of claims 13-20, wherein the lens assembly, the prism, and the optical sensor are arranged along the optical axis.

22. An electronic device, characterized in that, include: The motherboard and the camera module as described in claim 21, wherein the camera module is electrically connected to the motherboard.

23. A method for manufacturing an optical lens, characterized in that, include: Provide prefabricated components; A light barrier is formed inside the preform using a laser engraving process. The light-blocking wall has a light-blocking color and is free of cracks.

24. The method for manufacturing an optical lens according to claim 23, characterized in that, The laser wavelength in the laser engraving process is 1030nm-1064nm, the laser pulse energy is 100-200mJ, and the laser scanning speed is 10mm / s.

25. The method for manufacturing an optical lens according to claim 23 or 24, characterized in that, The laser used in the laser engraving process includes femtosecond lasers or picosecond lasers.

26. The method for manufacturing an optical lens according to any one of claims 23-25, characterized in that, Forming a light barrier inside the preform using laser engraving technology includes: The interior of the preform is irradiated with a laser multiple times to form multiple light spots, with adjacent light spots being adjacent or at least partially overlapping to form the light barrier.

27. The method for manufacturing an optical lens according to claim 26, characterized in that, The width of the overlapping portion of adjacent light spots is half the width of the light spot.

28. The method for manufacturing an optical lens according to any one of claims 23-27, characterized in that, Forming a light barrier inside the preform using laser engraving technology includes: Multiple barrier layers are stacked inside the preform, with adjacent barrier layers connected or spaced apart; and / or, the number of barrier layers is greater than or equal to 10; and / or, the thickness of the barrier layer is 100μm-300μm.

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