Optical lenses, camera modules and electronic devices

Abstract

This application provides an optical lens, a camera module, and an electronic device. The optical lens body includes an incident surface, a first reflecting surface, a second reflecting surface, and an exiting surface. The incident surface and the second reflecting surface are located on one side surface of the lens body, with the incident surface surrounding the second reflecting surface. The first reflecting surface and the exiting surface are located on the opposite side surface of the lens body, with the first reflecting surface surrounding the exiting surface. Light can enter through the incident surface, be reflected sequentially by the first and second reflecting surfaces, and then exit through the exiting surface. An annular light-absorbing surface is provided between the incident surface and the second reflecting surface, and / or between the first reflecting surface and the exiting surface. The light-absorbing surface is configured as a frosted surface, a blackened surface, or a microstructured surface, and / or, a light-absorbing layer is provided on the light-absorbing surface. The aforementioned optical lens is provided with a light-absorbing structure to absorb stray light, thereby improving image quality.

Description

Technical Field

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

[0002] As the camera requirements of electronic devices increase, the focal length of camera modules is becoming increasingly larger. Currently, industry experts have proposed an optical lens that reflects light within the lens before exiting, aiming to balance the large focal length and miniaturization requirements of camera modules. However, this optical lens generates a significant amount of stray light, resulting in poor image quality from the camera module. Summary of the Invention

[0003] This application provides an optical lens, a camera module, and an electronic device. The optical lens is provided with a light-absorbing structure to absorb stray light, thereby improving the imaging quality of the camera module.

[0004] In a first aspect, this application provides an optical lens. The optical lens can be applied within a camera module. The optical lens includes a lens body, which includes an incident surface, a first reflecting surface, a second reflecting surface, and an exiting surface. The incident surface and the second reflecting surface are located on one side surface of the lens body, with the incident surface surrounding the second reflecting surface. The first reflecting surface and the exiting surface are located on the opposite side surface of the lens body, with the first reflecting surface surrounding the exiting surface. Light can enter through the incident surface, be reflected sequentially by the first and second reflecting surfaces, and then exit through the exiting surface.

[0005] An annular light-absorbing surface is provided between the incident surface and the second reflecting surface, and / or between the first reflecting surface and the exiting surface. That is, an annular light-absorbing surface is provided between the incident surface and the second reflecting surface; or, an annular light-absorbing surface is provided between the first reflecting surface and the exiting surface; or, an annular light-absorbing surface is provided between the incident surface and the second reflecting surface, and an annular light-absorbing surface is provided between the first reflecting surface and the exiting surface. The light-absorbing surface is capable of absorbing light.

[0006] In this application, because the structure of the optical lens enables light to be reflected twice internally before being emitted, it achieves two optical path folds, which greatly increases the optical path of light in the camera module. This is beneficial for the camera module to achieve a long focal length while reducing the overall length of the camera module, thereby facilitating the miniaturization of the camera module and thus enabling the thin and light design of electronic devices.

[0007] By placing the light-absorbing surface between the incident surface and the second reflecting surface and / or between the first reflecting surface and the exiting surface, a light-absorbing structure is set at the non-effective optical surface of the optical lens, thereby effectively reducing stray light from the optical lens, improving phenomena such as bokeh and background blur in the camera module, and enhancing the imaging quality of the camera module.

[0008] In some implementations, the lens body of the optical lens may also include a first transition surface, which surrounds and connects the incident surface and the second reflecting surface. In this case, the first transition surface is arranged around the second reflecting surface, and the incident surface is arranged around the first transition surface. The first transition surface can serve as a transitional connection between the incident surface and the second reflecting surface, which is beneficial for the surface design of the incident surface and the second reflecting surface.

[0009] The lens body of the optical lens may also include a second transition surface, which can be arranged around the first reflecting surface and the emitting surface. In this case, the second transition surface is arranged around the emitting surface, and the first reflecting surface is arranged around the second transition surface. The second transition surface can serve as a transition connection between the first reflecting surface and the emitting surface, which is beneficial for the surface design of the first reflecting surface and the emitting surface.

[0010] In some implementations, the widths of the first and second transition surfaces can be greater than or equal to 0.2 mm to improve the forming yield of the optically effective surface of the lens body. Specifically, the width of the first transition surface can be less than or equal to 1 / 20 of the radial outer diameter of the incident surface on the optical lens to avoid insufficient size of the incident surface due to an excessively large first transition surface, thus ensuring the resolving power of the optical lens 1. Similarly, the width of the second transition surface can be less than or equal to 1 / 20 of the radial outer diameter of the first reflecting surface on the optical lens to avoid insufficient size of the first reflecting surface due to an excessively large second transition surface, thus ensuring the resolving power of the optical lens 1.

[0011] In some implementations, a portion or all of the first transition surface can be set as a light-absorbing surface, and / or a portion or all of the second transition surface can be set as a light-absorbing surface.

[0012] The incident surface, first reflecting surface, second reflecting surface, and exiting surface are the effective optical surfaces of the optical lens. Effective light enters the optical lens through the incident surface, is reflected sequentially by the first and second reflecting surfaces, and then exits the optical lens through the exiting surface. The light-absorbing surface is staggered from the effective optical surfaces to avoid affecting the normal propagation of effective light and to effectively absorb stray light.

[0013] In some possible implementations, the light-absorbing surface can be configured as a surface structure capable of absorbing light. The light-absorbing surface can be configured as a frosted surface, a blackened surface, or a microstructured surface.

[0014] In some possible implementations, a light-absorbing layer is provided on the light-absorbing surface. The material of the light-absorbing layer can be ink, clay printing, thin film, etc.

[0015] In some possible implementations, the light-absorbing surface can be configured as a surface structure capable of absorbing light and equipped with a light-absorbing layer. In this case, the light-absorbing layer is easier to fix to the light-absorbing surface, the connection between the two is stable, and they can work together to achieve a better light absorption effect. In addition, the atomized structure or microstructure of the light-absorbing surface can also be used for feature recognition, which is beneficial for assisting in locating the fabrication area of ​​the light-absorbing layer, thus enabling the light-absorbing layer to have high processing accuracy.

[0016] In some possible implementations, the width of the light-absorbing surface is greater than or equal to 0.1 mm. In this case, the light-absorbing effect is better, and the fabrication difficulty is lower. It is understood that, in the implementation of this application, the width of the annular surface structure, unless otherwise specified, generally refers to the distance between the inner and outer ring edges of the surface.

[0017] In some possible implementations, the inner and outer ring edges of the light-absorbing surface can form gaps with adjacent effective optical surfaces of the optical lens, for example, gaps greater than or equal to 0.1 mm, to reduce the risk of damage to the effective optical surfaces during the fabrication of the light-absorbing surface, thereby ensuring the optical reliability of the optical lens. In this case, if the first transition surface has a light-absorbing surface, the width of the first transition surface is greater than the width of the light-absorbing surface. If the second transition surface has a light-absorbing surface, the width of the second transition surface is greater than the width of the light-absorbing surface. For example, the width of the first transition surface and / or the second transition surface can be greater than or equal to 0.2 mm.

[0018] In some possible implementations, the light-absorbing surface is annular. Specifically, in a cross-section parallel to the optical axis of the optical lens, the cross-sectional shape of the light-absorbing surface can be straight, curved, spline-curve, multi-segment, or other shapes.

[0019] In some possible implementations, the light-absorbing surface is petal-shaped. Both the inner and outer edges of the light-absorbing surface can be petal-shaped, or one of them can be petal-shaped. The petal shape can also be understood as a closed, wavy ring. In this implementation, by setting the light-absorbing surface as a petal-shaped ring, the shape of stray light from the optical lens can be harmonized, making the shape of unabsorbed stray light more regular, which is beneficial for improving the imaging quality of the optical lens and camera module.

[0020] In some possible implementations, the light-absorbing surface is a sawtooth ring. Specifically, both the inner and outer edges of the light-absorbing surface can be sawtooth rings, or one of them can be sawtooth rings. In this implementation, by setting the light-absorbing surface as a sawtooth ring, the shape of stray light from the optical lens can be harmonized, making the shape of unabsorbed stray light regular, which is beneficial to improving the imaging quality of the optical lens and the camera module.

[0021] In some possible implementations, the microstructure surface includes raised microstructures, each comprising a first surface and a second surface, both of which are annular, with the angle between the first and second surfaces ranging from 30° to 120°.

[0022] In this implementation, the angle between the first and second surfaces of the light-absorbing surface microstructure is in the range of 30° to 120°, forming a V-shape. After the light rays incident on the light-absorbing surface are reflected by the first and second surfaces, they are refracted back along the original path, thereby preventing the light rays from continuing to propagate forward inside the lens body after reflection at the first transition surface and forming stray light. This helps to reduce stray light in the optical lens and improve the imaging quality.

[0023] For example, the absolute value of the difference between the width of the first surface and the width of the second surface is less than or equal to 100 μm. For example, the absolute value of the difference can be, but is not limited to, 0, 10 μm, 40 μm, 60 μm, 80 μm, 100 μm, or other values ​​less than 100 μm.

[0024] In this implementation, the absolute value of the difference between the width of the first surface and the width of the second surface satisfies the above design, which enables most of the light rays inside the lens body to be reflected from the first surface to the second surface and return along the original path, regardless of the angle at which they are incident on the microstructure, or to be reflected from the second surface to the first surface and return along the original path. This avoids the situation where the size difference between the first surface and the second surface is too large, which would prevent the light rays from being reflected between the two surfaces, thereby improving the effect of the light-absorbing surface in eliminating stray light.

[0025] In some possible implementations, at least a portion of the light-absorbing surface is recessed into the lens body to form a groove, and the light-absorbing layer is fixed to the groove wall. In this case, the light-absorbing layer can absorb light incident on the groove, thereby reducing stray light from the optical lens. Furthermore, the groove arrangement increases the light-absorbing area of ​​the light-absorbing layer, which helps ensure its stray light reduction effect.

[0026] When ink is used in the light-absorbing layer, the groove design can reduce the risk of ink overflowing onto the effective optical surface of the optical lens, thereby improving the product yield of the optical lens.

[0027] For example, the edge of the groove has a safety distance from the adjacent effective optical surface. This distance can be greater than or equal to 0.1 mm. For instance, the distance S1 between the groove on the second transition surface and the first reflecting surface is ≥ 0.1 mm, and the distance S2 between the groove and the exit surface is ≥ 0.1 mm. Similarly, the distances between the groove on the first transition surface and the incident surface and the second reflecting surface are also greater than or equal to 0.1 mm.

[0028] In this implementation, by setting a safety distance between the groove and the effective optical surface, the risk of edge chipping during the groove processing due to excessive manufacturing tolerance can be effectively avoided, thus helping to ensure the product yield of optical lenses.

[0029] In some possible implementations, at least a portion of the light-absorbing surface is recessed into the lens body to form a groove, and the optical lens includes a buffer adhesive that fills the groove. The buffer adhesive can be a soft material, such as silicone. In this implementation, the buffer adhesive can absorb stress and act as a buffer, thereby reducing the risk of the optical lens breaking and improving the structural reliability of the optical lens.

[0030] In some possible implementations, the buffer adhesive is a non-transparent adhesive. This non-transparent adhesive can absorb and block light, helping to reduce stray light from the optical lens. The non-transparent adhesive can be, for example, black glue.

[0031] In some possible implementations, the light-absorbing layer is fixed to the groove wall, and the buffer adhesive connects the light-absorbing layer.

[0032] In this implementation, the optical lens can absorb stray light through the light-absorbing layer and absorb stress through the buffer adhesive, thereby improving the imaging quality and structural reliability of the optical lens.

[0033] In some possible implementations, the light-absorbing surface includes an inner ring region, a middle region, and an outer ring region connected in sequence. The inner ring region and / or the outer ring region are recessed into the interior of the lens body to form an ink overflow groove. In this case, the ink overflow grooves formed by the inner ring region and / or the outer ring region are both annular, separating the middle region from the effective optical surface of the optical lens. The light-absorbing layer is an ink layer, and the light-absorbing layer is provided at least in the middle region and the ink overflow groove.

[0034] In this implementation, during the formation of the light-absorbing layer, such as when ink is sprayed onto the light-absorbing surface, because the inner and outer ring areas are provided with ink overflow grooves, when the ink flows from the middle area to both sides, it accumulates in the ink overflow grooves. The risk of the ink flowing across the ink overflow grooves to the effective optical surface is low. The blocking effect of the ink overflow grooves is obvious, which can prevent the ink from flowing to the effective optical curved surface next to the light-absorbing surface, avoid contaminating the effective optical curved surface of the lens body, and improve the product yield and optical reliability of the optical lens.

[0035] For example, the depth of the ink overflow groove can be greater than or equal to 0.01 mm, and the width can be greater than or equal to 0.05 mm. In this case, the ink overflow groove is easier to process, has a larger capacity, and provides better ink blocking effect. For example, the cross-sectional shape of the ink overflow groove can be U-shaped, V-shaped, W-shaped, or semi-circular, etc.

[0036] For example, there is a safety distance between the edge of the ink overflow groove and the adjacent effective optical surface. This distance can be greater than or equal to 0.1 mm. In this case, by setting a safety distance between the ink overflow groove and the effective optical surface, the risk of edge chipping during the processing of the ink overflow groove due to excessive manufacturing tolerances can be effectively avoided, thus helping to ensure the product yield of optical lenses.

[0037] In some possible implementations, the lens body has a first refractive index Nd1, and the light-absorbing layer has a second refractive index Nd2, where |Nd1-Nd2|≤0.1. In this implementation, by setting the refractive index difference between the lens body and the light-absorbing layer, the reflectivity of the inner surface of the light-absorbing layer (i.e., the surface facing the lens body) is kept below 0.5%, thereby achieving a better light absorption effect.

[0038] In some possible implementations, the light-absorbing surface is provided with multiple protrusions, which are arranged at intervals along the circumference of the light-absorbing surface.

[0039] In this implementation, the boss can serve as a process reference for further processing of the lens body after molding (such as subsequent frosting treatment, forming a light-absorbing layer on the light-absorbing surface, etc.), and can also be used for feature identification in subsequent processing. The shape of the boss can be designed to be relatively regular, for example, cylindrical, while other structures of the lens body are mostly curved or irregular in shape, making them difficult to use as process references and requiring higher positioning accuracy. Therefore, using the boss as a process reference reduces positioning difficulty and improves positioning efficiency, thereby increasing the efficiency of further processing.

[0040] In some possible implementations, the light-absorbing surface is also provided with a convex ring, which connects multiple protrusions, with the protrusions protruding relative to the convex ring.

[0041] In this implementation, the boss and convex ring can serve as process references for further processing of the lens body after molding (such as subsequent frosting treatment, forming a light-absorbing layer on the light-absorbing surface, etc.), and can also be used for feature identification in subsequent processing. The shapes of the boss and convex ring can be designed to be relatively regular, while other structures of the lens body are mostly curved or irregular in shape, making them difficult to use as process references and requiring higher positioning accuracy. Therefore, using the boss and convex ring as process references reduces positioning difficulty and improves positioning efficiency, thereby increasing the efficiency of further processing.

[0042] In some possible implementations, a light-blocking structure is provided inside the lens body, located between the incident and exit surfaces. This light-blocking structure is positioned along the stray light propagation path of the optical lens, thus blocking the propagation path of the effective light. For example, the light-blocking structure can be positioned close to the first transition surface or close to the second transition surface.

[0043] In this implementation, the light-blocking structure can disperse and absorb light, preventing it from propagating further, thereby eliminating stray light from the optical lens and improving image quality. The light-blocking structure can be ring-shaped, surrounding the optical axis of the optical lens (see reference). Figure 5A This is achieved by setting up a light-blocking structure to better block stray light. A light-blocking structure can also be a type of light-absorbing structure for optical lenses.

[0044] In some possible implementations, the light-blocking structure is a frosted or blackened structure. In some examples, the frosted or blackened structure can be formed inside the lens body using laser engraving.

[0045] For example, the light-blocking structure can be a closed structure, a planar structure, or other three-dimensional structures. For instance, the cross-sectional shape of the light-blocking structure can be a straight line, triangle, T-shape, V-shape, spiral, comb-shaped, etc., and the implementation method in this application is not strictly limited in this respect. For example, in... Figure 16 The optical lens shown includes two light-blocking structures. One light-blocking structure is located near the first transition surface, and its cross-sectional shape can be triangular. The other light-blocking structure is located near the second transition surface, and its cross-sectional shape can be V-shaped.

[0046] In some other implementations, the light-blocking structure can also be a light-blocking component embedded in the lens, such as a light-blocking film.

[0047] In the implementation of this application, the optical lens can achieve stray light elimination solely through the surface light-absorbing structure, or solely through the internal light-absorbing structure, or it can achieve stray light elimination by combining the surface light-absorbing structure with the internal light-absorbing structure.

[0048] In some possible implementations, the lens body of the optical lens can be made of glass. In this case, the optical lens has strong temperature resistance. Thus, when the optical lens is used in the camera module, the risk of the optical lens changing its surface shape due to the temperature rise of the camera module is low. This makes the transmission and reflection functions of the optical lens stable, which is beneficial to the optical path stability of the camera module and thus ensures the image quality.

[0049] In some implementations, the lens body of the optical lens can be manufactured through integral molding. In this case, the lens body is a one-piece structural component. In this implementation, since the lens body can be manufactured through integral molding, the surface accuracy of the lens body can be guaranteed, the relative positions of multiple effective optical surfaces are accurate, and the overall structural stability of the lens body is high. Furthermore, due to the high hardness of glass, compared to cutting, integral molding can improve processing efficiency and reduce processing difficulty.

[0050] In some possible implementations, the lens body includes a first lens body, a medium layer, and a second lens body stacked sequentially. The incident surface and the second reflecting surface are located on the first lens body, and the first reflecting surface and the exiting surface are located on the second lens body. The medium layer includes a first surface connecting the first lens body and a second surface connecting the second lens body. The first surface and the second surface are parallel to each other, and the medium layer is made of a light-transmitting material.

[0051] In this implementation, the lens body of the optical lens has a modular structure, offering high design flexibility. For example, the first and second lens bodies can be made of the same or different materials; for instance, they can be made of glass and plastic respectively, forming a glass-plastic composite structure. Of course, in other implementations, both the first and second lens bodies can be made of glass or both of plastic.

[0052] In some possible implementations, the thickness of the dielectric layer is less than or equal to 100 μm. In some examples, the thickness of the dielectric layer can be less than or equal to 30 μm.

[0053] In this implementation, by adjusting the thickness of the dielectric layer, the risk of misalignment or tilting of the first and second lens bodies is reduced, thereby improving the assembly precision of the optical lens body and ensuring its optical reliability. Simultaneously, a thinner dielectric layer also avoids large optical path differences caused by significant refractive index deviations, thus ensuring the imaging quality of the optical lens.

[0054] The thickness of the dielectric layer can be greater than or equal to 5 μm. This thickness prevents issues like insufficient adhesive or air bubbles caused by a thin dielectric layer, ensuring optimal bonding performance.

[0055] In some examples, the thickness of the dielectric layer can range from 5 μm to 15 μm. At this thickness, the optical lenses exhibit good product yield and high image quality.

[0056] In some possible implementations, the first mirror body has a third refractive index Nd3, and the dielectric layer has a fourth refractive index Nd4, where 0.9 ≤ Nd4 / Nd3 ≤ 1.1; the second mirror body has a fifth refractive index Nd5, where 0.9 ≤ Nd4 / Nd5 ≤ 1.1. This controls the difference between the refractive indices of the two mirror bodies and the refractive index of the dielectric layer to within 10%, ensuring that the refractive indices are close and effectively reducing optical path difference, thereby ensuring the imaging quality of the optical lens. The third refractive index Nd3 and the fifth refractive index Nd5 can be equal or unequal.

[0057] Specifically, when a light-absorbing layer is provided on the light-absorbing surface of the first transition surface, the absolute value of the difference between the refractive index of the first mirror and the refractive index of the light-absorbing layer is less than or equal to 0.1 mm, so that the reflectivity of the inner surface of the light-absorbing layer is below 0.5%, thereby achieving a better light absorption effect. When a light-absorbing layer is provided on the light-absorbing surface of the second transition surface, the absolute value of the difference between the refractive index of the second mirror and the refractive index of the light-absorbing layer is less than or equal to 0.1 mm, so that the reflectivity of the inner surface of the light-absorbing layer is below 0.5%, thereby achieving a better light absorption effect.

[0058] In some possible implementations, the first mirror body includes an inner surface facing the dielectric layer, and the second mirror body includes an inner surface facing the dielectric layer. At least one of the first surface, the second surface, the inner surface of the first mirror body, and the inner surface of the second mirror body is provided with a light-blocking region. The light-blocking region is a fogged structure, a blackened structure, a microstructure, or is provided with a light-blocking layer.

[0059] In this implementation, the optical lens has a light-blocking region on at least one of the first surface of the dielectric layer, the second surface of the dielectric layer, the inner surface of the first lens body, and the inner surface of the second lens body. The light-blocking region blocks the propagation of stray light, thereby eliminating stray light and improving the imaging quality of the optical lens.

[0060] Among these methods, setting a light-blocking region on at least one of the first surface of the dielectric layer, the second surface of the dielectric layer, the inner surface of the first mirror body, and the inner surface of the second mirror body is relatively easy to manufacture, implement, and achieves high precision. For example, compared to setting a light-absorbing surface on the first transition surface and / or the second transition surface, the above-mentioned surfaces are flatter and easier to manufacture. For example, when using laser technology to realize the atomization structure, the laser energy can be concentrated in the pre-processed area, resulting in high processing efficiency and high precision.

[0061] In some possible implementations, the optical lens includes a light-blocking component inserted into the dielectric layer and located between the incident and exit surfaces. The light-blocking component is positioned along the stray light propagation path of the optical lens, thus blocking the propagation path of the effective light rays. The light-blocking component can be arranged around the optical axis of the optical lens. The light-blocking component can be a thin sheet, plate, or three-dimensional structure capable of absorbing or reflecting light.

[0062] In this implementation, the light blocking component can disperse and absorb light, preventing it from continuing to propagate forward, thereby eliminating stray light from the optical lens and improving image quality.

[0063] The cross-sectional shape of the light blocking component can be a straight line, a cross, a triangle, a T, a V, a spiral, a comb, etc.

[0064] In some possible implementations, the incident surface is a plane, a convex surface, or a concave surface; and / or, the first reflecting surface is a plane, a convex surface, or a concave surface; and / or, the second reflecting surface is a plane, a convex surface, or a concave surface; and / or, the exiting surface is a plane, a convex surface, or a concave surface.

[0065] In some possible embodiments, the lens body further includes a first transition surface and a second transition surface, the first transition surface being connected between the incident surface and the second reflecting surface, and the second transition surface being connected between the first reflecting surface and the exiting surface.

[0066] In this embodiment, the first transition surface serves as a transitional connection between the incident surface and the second reflecting surface, which is beneficial for the surface design of the incident surface and the second reflecting surface. Similarly, the second transition surface serves as a transitional connection between the first reflecting surface and the exiting surface, which is also beneficial for the surface design of the first reflecting surface and the exiting surface.

[0067] For example, the optical lens includes at least one light-blocking barrier located on the side of the first transition surface facing the first reflective surface, and / or, the light-blocking barrier located on the side of the second transition surface facing the second reflective surface. The light-blocking barrier is colored and free of cracks.

[0068] In this embodiment, by setting at least one light-blocking wall within the non-effective optical area of ​​the optical lens, the light-blocking wall effectively prevents stray light from propagating within the optical lens, thereby reducing stray light and improving image quality. The light-blocking wall is colored and crack-free, which not only enhances the light-blocking effect but also avoids physical damage to the optical lens, thus ensuring the structural and optical performance reliability of the optical lens.

[0069] By setting up a light-blocking wall on the side of the first transition surface facing the first reflective surface, and / or on the side of the second transition surface facing the second reflective surface, a portion of the stray light from the optical lens can be blocked. For example, most of the direct stray light and the fourth reflection stray light will be blocked by the light-blocking wall, thereby reducing the stray light from the optical lens and improving the imaging quality.

[0070] In some possible embodiments, the optical lens is made of a glass material containing oxide components with a refractive index in the range of 1.49 to 2.1, including at least one of boron oxide, titanium oxide, barium oxide, lanthanide oxide, or rubidium oxide.

[0071] In this embodiment, the material selection of the optical lens not only meets its optical path propagation requirements, but also facilitates the formation of a colored and crack-free light barrier.

[0072] In some possible embodiments, 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% to further improve the light-blocking effect of the light-blocking wall.

[0073] In some possible embodiments, the light barrier is black, brown, off-white, or yellow. The color of the light barrier is diverse.

[0074] In some possible embodiments, the light barrier is characterized by having a cross-section, the plane of which coincides with the optical axis of the optical lens, and the shape of the cross-section being strip-shaped, T-shaped, V-shaped, I-shaped, triangular, trapezoidal, stepped, columnar, wavy, annular, sawtooth, petal-shaped, spiral, or rectangular.

[0075] In this embodiment, the light-blocking walls have diverse structures, which can better adapt to the shape of the non-effective optical area where they are located, thereby improving their light-blocking effect. The shape of each light-blocking wall can be designed independently, offering high design flexibility.

[0076] In some possible embodiments, the light barrier includes multiple blocking layers arranged in a stacked manner. In this embodiment, during the fabrication of the light barrier, multiple laser spots are first used to lay out the blocking layers, and then the light barrier is formed by stacking the multiple blocking layers. By changing the shape of the blocking layers, or by changing the stacking direction, stacking position, or stacking number of the blocking layers, various shapes of the light barrier can be achieved.

[0077] For example, adjacent barrier layers may be connected or spaced apart. In this case, the arrangement of the barrier layers can be diverse.

[0078] For example, the number of blocking layers is more than 10. In this case, the light-blocking wall has a certain thickness, resulting in low transmittance, for example, reducing the transmittance to below 0.3%, thus achieving a good light-blocking effect. The number of blocking layers can be in the range of 10 to 20 layers. In this case, the light-blocking wall can meet the requirements of low transmittance and high processing efficiency.

[0079] For example, the thickness of the barrier layer is in the range of 100 micrometers to 300 micrometers. At this thickness, the manufacturing precision of the barrier layer is high, which is beneficial for improving the manufacturing precision of the light barrier.

[0080] In some possible embodiments, the multiple blocking layers are arranged parallel to the optical axis of the optical lens, or form an angle of less than 45° with the optical axis of the optical lens. In this case, light rays incident on the light barrier formed by the stacked blocking layers are less prone to dispersion, and the light barrier has a better light-blocking effect.

[0081] In some possible embodiments, at least one light-blocking barrier includes a first light-blocking barrier located on the side of the first transition surface facing the first reflective surface. The first light-blocking barrier is arranged around the optical axis of the optical lens and is a continuous structure or includes multiple spaced-apart portions. In this case, the first light-blocking barrier has a good light-blocking effect.

[0082] In some possible embodiments, at least one light-blocking wall includes a second light-blocking wall located on the side of the second transition surface facing the second reflective surface. The second light-blocking wall is arranged around the optical axis of the optical lens and is a continuous structure or includes multiple spaced-apart portions. In this case, the second light-blocking wall has a good light-blocking effect.

[0083] In some possible embodiments, the width of the first light-blocking wall is reduced in the direction from the first transition surface to the first reflective surface. Here, the width of the first light-blocking wall refers to the dimension of its cross-section in the direction perpendicular to the direction from the first transition surface to the first reflective surface, and the plane containing the cross-section of the first light-blocking wall coincides with the optical axis of the optical lens.

[0084] In this embodiment, the shape of the first light-blocking wall is highly adaptable to the shape of the non-effective optical area it is located in, and the light-blocking effect of the first light-blocking wall is good. It is understood that the first light-blocking wall can adopt a variety of shapes to meet the requirements of its width variation, and the specific shape is not strictly limited in this embodiment.

[0085] In some possible embodiments, the width of the second light barrier is reduced in the direction from the second transition surface to the second reflective surface. Here, the width of the second light barrier refers to the dimension of its cross-section in the direction perpendicular to the direction from the second transition surface to the second reflective surface, and the plane containing the cross-section of the second light barrier coincides with the optical axis of the optical lens.

[0086] In this embodiment, the shape of the second light barrier is highly adaptable to the shape of the non-effective optical area it is located in, resulting in good light-blocking effect. It is understood that the second light barrier can adopt various shapes to meet its width variation requirements; this embodiment does not strictly limit the specific shape.

[0087] In some possible embodiments, the first light barrier and / or the second light barrier are annular, serrated, petal-shaped, or spiral. The first light barrier and / or the second light barrier can be a complete, rotationally symmetric annular structure, or it can be other shapes that are not complete and / or not rotationally symmetric. This application does not strictly limit the specific shape of the light barrier in its embodiments.

[0088] In some possible embodiments, the optical lens further includes a third transition surface and a fourth transition surface. The third transition surface is located on the same side surface of the optical lens as the second reflecting surface and is surrounded by the second reflecting surface. The fourth transition surface is located on the same side surface of the optical lens as the exiting surface and is surrounded by the exiting surface. The third transition surface facilitates the surface design of the second reflecting surface and reduces manufacturing difficulty. Similarly, the fourth transition surface facilitates the surface design of the exiting surface and reduces manufacturing difficulty.

[0089] In some possible embodiments, at least one light-blocking wall is located between the third transition surface and the fourth transition surface. For example, at least one light-blocking wall may include a third light-blocking wall located between the third transition surface and the fourth transition surface. In this case, the third light-blocking wall can block a portion of the stray light from the optical lens; for example, most of the inter-plane reflected stray light will be blocked by the third light-blocking wall, thereby reducing the stray light from the optical lens and improving the imaging quality.

[0090] In some possible embodiments, the width of the third light barrier decreases in the direction from the third transition surface to the fourth transition surface. Here, the width of the third light barrier refers to the dimension of its cross-section in the direction perpendicular to the direction from the third transition surface to the fourth transition surface, and the plane containing the cross-section of the third light barrier coincides with the optical axis of the optical lens.

[0091] In this embodiment, the shape of the third light barrier is highly adaptable to the shape of the non-effective optical area it is located in, resulting in good light-blocking effect. It is understood that the third light barrier can adopt various shapes to meet its width variation requirements; this embodiment does not strictly limit the specific shape.

[0092] In some possible embodiments, at least a portion of the first transition surface and / or the second transition surface is a fogged surface, a blackened surface, a microstructured surface, or is covered with a light-absorbing layer.

[0093] In this embodiment, the optical lens effectively reduces stray light and achieves better imaging results by setting a light-blocking wall inside it and setting a light-absorbing structure on its surface.

[0094] In some possible embodiments, the third transition surface has a protrusion. In this case, during the molding process of the optical lens, a groove is formed in the molding die corresponding to the protrusion. This groove can be used to position the center of the incoming material and helps to stably place the material in the molding die. The optical lens can be molded in one step, which not only improves molding efficiency (reducing the number of molding cycles), reduces the number of molding cycles, and lowers manufacturing costs, but also avoids the appearance defects caused by air trapping problems resulting from secondary or multiple molding processes. This improves the processing accuracy of molding and leads to a higher yield of optical lenses. Furthermore, the third transition surface has a large area, making it easier to arrange the protrusion, and the shape and size of the protrusion are relatively easy to meet the molding positioning requirements. The protrusion's position corresponds to the non-effective optical surface and non-effective optical area of ​​the optical lens, and will not affect the optical performance of the optical lens.

[0095] In some possible embodiments, the surface shape of the raised outer surface can be spherical, aspherical, spline surface, etc.

[0096] In some possible embodiments, the radius of curvature of the outer surface of the protrusion is less than or equal to the radius of curvature of the incident surface. In this embodiment, the radius of curvature of the outer surface of the protrusion is designed to be less than or equal to the radius of curvature of the incident surface, thereby playing a centering role during the molding process and avoiding or reducing the risk of air entrapment, thus improving the molding accuracy of the optical lens.

[0097] For example, the diameter of the protrusion can be greater than or equal to 1.5 mm. Alternatively, the ratio of the diameter of the protrusion to the diameter of the second reflective surface can be greater than or equal to 1 / 5. In this case, the protrusion design does not reduce the optical performance of the optical lens and helps to stabilize the incoming material during the molding process, thereby improving the manufacturing yield of the optical lens.

[0098] In some possible embodiments, the outer surface of the protrusion is a frosted surface, a blackened surface, a microstructured surface, or is covered with a light-absorbing layer. In this case, the protrusion can absorb stray light and block its propagation, which is beneficial to improving the optical performance of the optical lens.

[0099] In some possible embodiments, the optical lens further includes a filler that covers at least a portion of the second reflective surface and the first transition surface, and the filler is made of a light-absorbing material or a light-blocking material.

[0100] In optical lenses, when a sharp corner structure is formed at the first transition surface, the sharp corner structure may have a color difference problem (i.e., gold edge) when viewed from different angles. In this embodiment, the optical lens removes the sharp corner structure by setting a filler, thereby effectively solving the above-mentioned color difference problem and improving the optical performance of the optical lens.

[0101] In some examples, the top surface of the filler can be flush with the highest point of the first transition surface.

[0102] In some possible implementations, the optical lens includes a first high-reflectivity film and a second high-reflectivity film, with the first high-reflectivity film covering a first reflective surface and the second high-reflectivity film covering a second reflective surface.

[0103] In this implementation, the optical lens is coated with a high-reflectivity film on the first and second reflecting surfaces to reduce the transmittance and increase the reflectance of the first and second reflecting surfaces, thereby improving image quality. For example, the transmittance of the first and second reflecting surfaces can be less than or equal to 1%, and the reflectance can be greater than or equal to 70%.

[0104] For example, the thickness of the first high reflectivity film and the second high reflectivity film can be in the range of 150nm to 500nm, such as 200nm, 250nm, 280nm, 330nm, 400nm, 470nm, etc., in order to balance the anti-reflective effect and thinness.

[0105] In some possible implementations, the optical lens further includes a first isolation film that covers a second high-reflectivity film. The optical lens also includes a first anti-reflection film and a second anti-reflection film, with the first anti-reflection film covering the incident surface and the first isolation film, and the second anti-reflection film covering the exit surface.

[0106] In this implementation, the optical lens uses antireflective coatings at both the incident and exit surfaces to reduce reflectivity and increase transmittance, thereby improving image quality. For example, the transmittance at the incident and exit surfaces can be greater than or equal to 80%. During the fabrication of the first antireflective coating, the first isolation film covers the second high-reflectivity film, protecting it from damage and ensuring high reliability for both. Furthermore, the first isolation film can absorb stress, reducing problems such as film cracking and peeling caused by increased film thickness, further improving the reliability of both the second high-reflectivity film and the first antireflective coating, resulting in a highly reliable optical lens. Moreover, since the first antireflective coating can simultaneously cover both the first high-reflectivity film and the first isolation film, there is no need to fabricate a separate fixture to block the second reflective surface during the fabrication of the first antireflective coating, simplifying the fixture structure and reducing fabrication difficulty.

[0107] For example, the thickness of the first antireflection film and the second antireflection film can be in the range of 150nm to 450nm, such as 200nm, 250nm, 280nm, 330nm, 400nm, etc., in order to balance the antireflection effect and thinness.

[0108] For example, the first isolation film can be made of oil mist, black glue, or other materials. The first isolation film can be attached to the second high-reflectivity film, protecting the second high-reflectivity film and being covered by the first anti-reflection film. The isolation film can also be called an isolation layer, isolation adhesive, etc.

[0109] In some possible implementations, the optical lens also includes a second isolation film, which covers the first high-reflectivity film, and the second anti-reflection film further covers the second isolation film. In this case, the second isolation film covering the first high-reflectivity film prevents damage to the first high-reflectivity film during the fabrication of the second anti-reflection film, resulting in high reliability for both the first high-reflectivity film and the second anti-reflection film. Furthermore, the second isolation film can also absorb stress, reducing problems such as film cracking and peeling caused by increased film thickness, further improving the reliability of both the first high-reflectivity film and the second anti-reflection film, thus enhancing the overall reliability of the optical lens. Moreover, since the second anti-reflection film can simultaneously cover the exit surface and the second isolation film, there is no need to fabricate an additional fixture to block the first reflective surface during the fabrication of the second anti-reflection film, thereby simplifying the fixture structure and reducing the fabrication difficulty.

[0110] In some possible implementations, the optical lens also includes a peripheral side surface that surrounds the two side surfaces of the lens body. At least a portion of the peripheral side surface has a frosted structure, a blackened structure, or a light-absorbing layer. In this case, the aforementioned area of ​​the peripheral side surface can absorb stray light, thereby reducing stray light in the optical lens and improving the imaging effect of the optical lens and the camera module.

[0111] Secondly, this application provides a camera module. The camera module includes a lens group, an image sensor, and an optical lens of any of the above, with the lens group located between the optical lens and the image sensor. In this application, the camera module achieves high imaging quality.

[0112] In some possible implementations, the camera module also includes a first optical path folding element and a lens barrel. The lens barrel encloses a mounting space, in which the optical lens, the first optical path folding element, and the lens group are all mounted. The first optical path folding element is located between the optical lens and the lens group and is used to change the direction of light propagation.

[0113] The lens barrel can be a one-piece molded structure. In this case, after the optical lens, the first optical path folding element, and the lens group are installed into the lens barrel, these three components do not need to be assembled and aligned separately. This reduces the number of structural assembly and optical path alignment steps, which can save assembly time, reduce costs, and reduce optical path alignment errors during assembly. This is beneficial to the overall optical path accuracy of the camera module and improves the shooting effect.

[0114] In other implementations, the lens barrel can also be a modular structure. For example, the lens barrel can include three parts: an optical lens, a first optical path folding element, and a lens group, each mounted to one of the three parts to form a component, which are then assembled to form a complete structure. In this case, using a modular structure for the lens barrel and then reassembling it helps reduce design complexity and module assembly difficulty. As another example, the lens barrel can also include two parts: one of the optical lens, the first optical path folding element, and the lens group is mounted in one part, and the other two are mounted in the other part.

[0115] Thirdly, this application provides an electronic device. The electronic device includes a housing and a camera module as described above, the camera module being mounted on the housing. The electronic device has high image quality. Attached Figure Description

[0116] Figure 1A This is a schematic diagram of the structure of the electronic device provided in some embodiments of this application;

[0117] Figure 1B yes Figure 1A A partially exploded structural diagram of the electronic device shown.

[0118] Figure 2 yes Figure 1A The electronic device shown is partially structurally illustrated in some embodiments after being cut along line AA.

[0119] Figure 3 yes Figure 2 A partial structural exploded view of the central camera module in some embodiments;

[0120] Figure 4A yes Figure 2 A schematic diagram of the structure of a central optical lens in some embodiments;

[0121] Figure 4B yes Figure 4A A schematic diagram of the optical lens shown from another perspective;

[0122] Figure 5A yes Figure 4A A schematic diagram of the structure of the optical lens shown in some embodiments after being cut along line BB;

[0123] Figure 5B yes Figure 5A The diagram shows the light patterns of the optical lens in some application scenarios.

[0124] Figure 6 yes Figure 2 Schematic diagrams of the optical lens in some other embodiments;

[0125] Figure 7A yes Figure 2 Schematic diagrams of the optical lens in some other embodiments;

[0126] Figure 7B yes Figure 2 Schematic diagrams of the optical lens in some other embodiments;

[0127] Figure 7C yes Figure 2 Schematic diagrams of the optical lens in some other embodiments;

[0128] Figure 8 yes Figure 2 Schematic diagrams of the optical lens in some other embodiments;

[0129] Figure 9 yes Figure 2 Schematic diagrams of the optical lens in some other embodiments;

[0130] Figure 10 yes Figure 2 A partial structural schematic diagram of the optical lens in some other embodiments;

[0131] Figure 11 yes Figure 2 A partial structural schematic diagram of the optical lens in some other embodiments;

[0132] Figure 12 yes Figure 2 A partial structural schematic diagram of the optical lens in some other embodiments;

[0133] Figure 13 yes Figure 2 A partial structural schematic diagram of the optical lens in some other embodiments;

[0134] Figure 14 yes Figure 2 A partial structural schematic diagram of the optical lens in some other embodiments;

[0135] Figure 15 yes Figure 2 Schematic diagrams of the optical lens in some other embodiments;

[0136] Figure 16 yes Figure 2 A partial structural schematic diagram of the optical lens in some other embodiments;

[0137] Figure 17 yes Figure 2 Schematic diagrams of the optical lens in some other embodiments;

[0138] Figure 18 yes Figure 2 A partial structural schematic diagram of the optical lens in some other embodiments;

[0139] Figure 19 yes Figure 2 A partial structural schematic diagram of the optical lens in some other embodiments;

[0140] Figure 20A yes Figure 2 Schematic diagrams of the optical lens in some other embodiments;

[0141] Figure 20B yes Figure 20A A schematic diagram of the optical lens shown from another angle;

[0142] Figure 21A This is a schematic diagram of the structure of the lens body formed by molding in some embodiments of this application;

[0143] Figure 21B yes Figure 21A The lens body shown is further processed into an optical lens in some embodiments;

[0144] Figure 22 yes Figure 2 Schematic diagrams of the optical lens in some other embodiments;

[0145] Figure 23 yes Figure 22 The diagram shows the coating steps in the manufacturing process of the optical lens.

[0146] Figure 24 It was through Figure 23 A schematic diagram of the structure formed by the steps shown;

[0147] Figure 25 yes Figure 22 The diagram shows the coating steps in the fabrication process of the optical lens. Figure 2 ;

[0148] Figure 26 yes Figure 22 The diagram shows the intermediate structure of the optical lens during the manufacturing process.

[0149] Figure 27 yes Figure 22 The diagram shows the coating steps in the fabrication process of the optical lens. Figure 3 ;

[0150] Figure 28 yes Figure 2 Schematic diagrams of the optical lens in some other embodiments;

[0151] Figure 29 yes Figure 28 The diagram shows the intermediate structure of the optical lens during the manufacturing process.

[0152] Figure 30 yes Figure 28 The diagram shows the coating steps in the manufacturing process of the optical lens.

[0153] Figure 31 yes Figure 2 The diagram shows the internal structure of the optical lens in some embodiments.

[0154] Figure 32A yes Figure 31 Top view of the optical lens shown;

[0155] Figure 32B yes Figure 31 The bottom view of the optical lens shown;

[0156] Figure 33 yes Figure 31 A schematic diagram of the optical path structure of the optical lens shown.

[0157] Figure 34 yes Figure 31 Schematic diagram of some deformed structures of the second light barrier of the optical lens shown;

[0158] Figure 35 yes Figure 31 Schematic diagram of some deformed structures of the third light barrier of the optical lens shown;

[0159] Figure 36 yes Figure 2 Schematic diagram of the internal structure of the optical lens shown in some other embodiments;

[0160] Figure 37 yes Figure 31 Schematic diagrams of some modified light-absorbing structures of the second transition surface of the optical lens shown.

[0161] Figure 38 yes Figure 31 Schematic diagrams of some deformed light-absorbing structures of the third and fourth transition surfaces of the optical lens shown.

[0162] Figure 39 This is a schematic diagram of a cross-sectional structure of a light-absorbing structure on a non-effective optical surface of an optical lens, as provided in an embodiment of this application.

[0163] Figure 40 This is a schematic diagram of another cross-sectional structure of the light-absorbing structure of an optical lens on its non-effective optical surface, provided in an embodiment of this application;

[0164] Figure 41 This is a schematic diagram of the structure corresponding to a method for manufacturing an optical lens provided in an embodiment of this application;

[0165] Figure 42 It is the preparation Figure 41A schematic diagram of the process structure of prefabricated components;

[0166] Figure 43A It is the preparation Figure 41 Schematic diagram of the structural steps of the Zhongguang retaining wall;

[0167] Figure 43B It is the preparation Figure 41 Schematic diagram of the steps and structure of the Zhongguang retaining wall Figure 2 ;

[0168] Figure 44A It is the preparation Figure 41 A schematic diagram of the light-absorbing structure located on the surface of the preform;

[0169] Figure 44B It is the preparation Figure 41 Schematic diagram of the light-absorbing structure located on the surface of the preform. Figure 2 ;

[0170] Figure 45 yes Figure 2 Schematic diagram of the internal structure of the optical lens shown in some other embodiments;

[0171] Figure 46 yes Figure 45 The diagram shows the structure of the optical lens during the molding process.

[0172] Figure 47 yes Figure 45 The optical lens shown is a three-dimensional structural diagram in some embodiments;

[0173] Figure 48 yes Figure 2 Schematic diagram of the internal structure of the optical lens shown in some other embodiments;

[0174] Figure 49 yes Figure 48 The diagram shows the structure of the optical lens during the molding process.

[0175] Figure 50 yes Figure 2 Schematic diagram of the internal structure of the optical lens shown in some other embodiments;

[0176] Figure 51 yes Figure 2 The diagram shows the internal structure of the optical lens in some other embodiments. Detailed Implementation

[0177] The embodiments of this application are described below with reference to the accompanying drawings.

[0178] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The term "multiple" refers to at least two. The term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. The term "integral-molded structural component" means that during the formation of one part of the structural component, that part is connected to another part without requiring further processing (such as bonding, welding, snap-fit ​​connection, screw connection) to connect the two parts together.

[0179] The directional terms mentioned in the embodiments of this application, such as "inner", "outer", "side", etc., are only for reference to the direction of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0180] In the embodiments of this application, the relative positional relationships mentioned, such as parallel, perpendicular, and aligned, are defined in relation to the current technological level, rather than being absolutely strict. Slight deviations are permissible; approximations of parallelism, perpendicularity, or alignment are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. Similarly, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0181] In the embodiments of this application, the terms "first," "second," "third," and "fourth" 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. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0182] Please refer to the following: Figures 1A to 2 , Figure 1A This is a schematic diagram of the structure of the electronic device 100 provided in some embodiments of this application. Figure 1B yes Figure 1A A partial exploded view of the electronic device 100 shown. Figure 2 yes Figure 1A The electronic device 100 shown is partially structurally illustrated in some embodiments after being cut along line AA.

[0183] In some embodiments, the electronic device 100 may be a mobile phone, tablet personal computer, laptop computer, smart screen, personal digital assistant (PDA), camera, personal computer, laptop computer, in-vehicle equipment, wearable device, augmented reality (AR) glasses, AR helmet, virtual reality (VR) glasses, or VR helmet, or other devices with camera functions. Figure 1A In this embodiment, the electronic device 100 is a mobile phone as an example for description. Of course, other types of electronic devices 100 can also adopt a similar structure, which will not be described in detail below.

[0184] Understandable, Figure 1A and Figure 1B The electronic device 100 is shown only schematically, and the actual shape, size, location, and construction of these components are not subject to change. Figure 1A and Figure 1B Due to limitations, electronic device 100 may also include, compared to Figure 1A and Figure 1B More or fewer parts.

[0185] In some embodiments, the electronic device 100 may include a camera module 10, a screen 20, and a housing 30. The screen 20 is used to display images, videos, etc. The screen 20 may include a light-transmitting panel 201 and a display screen 202. The light-transmitting panel 201 and the display screen 202 are stacked and fixedly connected. The light-transmitting panel 201 mainly serves to protect the display screen 202 from dust. The material of the light-transmitting panel 201 includes, but is not limited to, glass. The display screen 202 may be a flexible display screen or a rigid display screen. For example, the display screen 202 can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MLED) display screen, a micro organic light-emitting diode (MOLED) display screen, a quantum dot light-emitting diode (QLED) display screen, a liquid crystal display (LCD), etc.

[0186] For example, the housing 30 is used to protect the internal electronic components of the electronic device 100. The housing 30 may include a cover plate 301, a frame 302, and a camera trim 303. The cover plate 301 is located on the side of the display screen 202 away from the light-transmitting panel 201, and is stacked with the light-transmitting panel 201 and the display screen 202. The frame 302 is fixed to the cover plate 301. For example, the frame 302 can be fixedly connected to the cover plate 301 by adhesive. The frame 302 may also be integrally formed with the cover plate 301, that is, the frame 302 and the cover plate 301 are a single structure. The frame 302 is located between the cover plate 301 and the light-transmitting panel 201. The light-transmitting panel 201 can be fixed to the frame 302 by adhesive. The light-transmitting panel 201, the cover plate 301, and the frame 302 form an internal accommodating space of the electronic device 100. This internal accommodating space houses the display screen 202. The cover plate 301 can be made of materials such as metal, plastic, or glass. The cover plate 301 can be a plate made of a single material or a plate structure made of multiple materials and spliced ​​from multiple plates. The cover plate 301 is provided with a mounting opening 3011, and the camera decorative piece 303 covers and is fixed to the mounting opening 3011.

[0187] For example, camera module 10 is used to capture photos / videos. For example, camera module 10 is mounted within housing 30, located within the internal accommodating space of electronic device 100. Camera module 10 can be used as a rear-facing camera. For example, the light-receiving area of ​​camera module 10 faces camera trim 303. Camera trim 303 is used to protect camera module 10.

[0188] In some embodiments, the camera trim 303 protrudes from the side of the cover plate 301 away from the light-transmitting panel 201. This increases the space for the camera module 10 in the thickness direction of the electronic device 100. In other embodiments, the camera trim 303 may be flush with the cover plate 301 or recessed into the internal accommodating space of the electronic device 100.

[0189] The camera decorative element 303 has a light-transmitting hole 3031. The light-transmitting hole 3031 allows light from objects to enter the camera module 10. In some other embodiments, the electronic device 100 may not include the camera decorative element 303. In this case, the cover plate 301 no longer has a mounting opening 3011, but the light-transmitting hole 3031 is provided on the cover plate 301, allowing light from objects to enter the camera module 10.

[0190] In some embodiments, the camera module 10 can also be used as a front-facing camera. For example, the light-incident surface of the camera module 10 faces the light-transmitting panel 201. The display screen 202 is provided with a light-path obstruction hole. This light-path obstruction hole allows light from the scene to pass through the light-transmitting panel 201 and then enter the light-incident surface of the camera module 10. In some embodiments, the electronic device 100 may also include one or more other camera modules (not shown in the figures), which are not strictly limited in this application.

[0191] In some embodiments, such as Figure 1B As shown, the electronic device 100 may further include a circuit board 40 and an image processor 50. The circuit board 40 and the image processor 50 are located within the internal accommodating space of the electronic device 100. The image processor 50 is fixed to and electrically connected to the circuit board 40. The image processor 50 is communicatively connected to the camera module 10. The image processor 50 is used to acquire image data from the camera module 10 and process the image data. The communication connection between the camera module 10 and the image processor 50 may include data transmission via electrical connections such as wiring, or data transmission via coupling or other methods. It is understood that the camera module 10 and the image processor 50 may also be connected via other methods capable of data transmission.

[0192] In some embodiments, the electronic device 100 may further include an analog-to-digital converter (also known as an A / D converter, not shown in the figure). The analog-to-digital converter is connected between the camera module 10 and the image processor 50. The analog-to-digital converter is used to convert the signal generated by the camera module 10 into a digital image signal and transmit it to the image processor 50, whereby the image processor 50 processes the digital image signal and finally displays the image or video on the screen 20.

[0193] In some embodiments, the electronic device 100 may further include a memory (not shown in the figure), which is communicatively connected to the image processor 50. The image processor 50 processes the digital image signal and then transmits the image to the memory so that the image can be retrieved from the memory and displayed on the screen 20 at any time when it is needed to view the image. In some embodiments, the image processor 50 may also compress the processed digital image signal before storing it in the memory to save memory space.

[0194] Understandable, Figure 1A and Figure 1B The installation position of the camera module 10 in the illustrated embodiment of the electronic device 100 is merely illustrative, and this application does not strictly limit the installation position of the camera module 10. In some other embodiments, the camera module 10 may also be installed in other locations on the electronic device 100, such as the upper middle or upper right corner of the back of the electronic device 100. In some other embodiments, the electronic device 100 may include a terminal body and an auxiliary component that can rotate, move, or be detached relative to the terminal body, and the camera module 10 may also be disposed on the auxiliary component.

[0195] Please refer to the following: Figure 2 and Figure 3 , Figure 3 yes Figure 2 A partial structural exploded view of the camera module 10 in some embodiments.

[0196] In some embodiments, the camera module 10 may include an optical lens 1, a first optical path folding element 2, a lens group 3, a second optical path folding element 4, a filter 5, an image sensor 6, a lens barrel 7, and a module housing 8. The optical lens 1, the first optical path folding element 2, and the lens group 3 may be installed inside the lens barrel 7, while the second optical path folding element 4, the filter 5, and the image sensor 6 may be installed inside the module housing 8. The lens barrel 7 may be connected to the module housing 8. Light can enter through the optical lens 1, pass sequentially through the optical lens 1, the first optical path folding element 2, the lens group 3, the second optical path folding element 4, and the filter 5, and then be incident on the image sensor 6. That is, in the optical system of the camera module 10, from the object side to the image side, the optical lens 1, the first optical path folding element 2, the lens group 3, the second optical path folding element 4, the filter 5, and the image sensor 6 are arranged sequentially.

[0197] In this embodiment, the first optical path folding element 2 and the second optical path folding element 4 are used to change the direction of the optical path, thereby realizing optical path folding, increasing the optical path length of the light in the camera module 10, which is beneficial to achieving a long focal length of the camera module 10 while realizing a miniaturized design.

[0198] For example, the lens body 11 of the optical lens 1 may include an incident surface 11a, a first reflecting surface 11b, a second reflecting surface 11c, and an exiting surface 11d. The incident surface 11a and the second reflecting surface 11c are located on one side surface of the optical lens 1, with the incident surface 11a surrounding the second reflecting surface 11c; the first reflecting surface 11b and the exiting surface 11d are located on the opposite side surface of the optical lens 1, with the first reflecting surface 11b surrounding the exiting surface 11d. Light can enter through the incident surface 11a, be reflected sequentially by the first reflecting surface 11b and the second reflecting surface 11c, and then exit through the exiting surface 11d.

[0199] It should be noted that, Figure 2 The dotted line with arrows in the middle indicates the light path in the camera module 10. It can be understood that this path is only for illustration and does not limit the light path in the camera module 10.

[0200] In this embodiment, since the structure of the optical lens 1 enables light to be reflected twice internally before being emitted, it achieves two optical path folds, which greatly increases the optical path of light within the camera module 10. This is beneficial for the camera module 10 to achieve a long focal length while reducing the overall length of the camera module 10, thereby facilitating the miniaturization of the camera module 10 and further contributing to the thin and light design of the electronic device 100.

[0201] For example, the first optical path folding element 2 can be a combination of a prism, a mirror, or a lens, as long as the first optical path folding element 2 can change the propagation direction of light and realize optical path folding.

[0202] For example, the lens group 3 can contain one or more lenses, and the lens group 3 may include lenses with positive optical power and / or lenses with negative optical power. The lens group 3 is located between the optical lens 1 and the image sensor 6 to adjust the optical path and improve the imaging effect.

[0203] For example, the second optical path folding element 4 can be a combination of a prism, a mirror, or a lens, as long as the second optical path folding element 4 can change the propagation direction of light and realize optical path folding.

[0204] For example, filter 5 can be an infrared filter or blue glass (BG), as long as it can filter light to improve the imaging effect.

[0205] For example, the lens barrel 7 can be configured to form a mounting space 71, in which the optical lens 1, the first optical path folding element 2, and the lens group 3 are all mounted. The mounting space 71 may have a first opening 711 and a second opening 712, the orientation of the first opening 711 intersecting the orientation of the second opening 712. The optical lens 1 and the first optical path folding element 2 can be inserted into the mounting space 71 through the first opening 711, and the lens group 3 can be inserted into the mounting space 71 through the second opening 712.

[0206] In this embodiment, the lens barrel 7 can be used to install and protect the optical lens 1, the first optical path folding element 2 and the lens group 3, so that the relative positional relationship of the optical lens 1, the first optical path folding element 2 and the lens group 3 is stable, which is beneficial to the optical path stability of the camera module 10.

[0207] The lens barrel 7 can be a one-piece molded structural component. In this case, after the optical lens 1, the first optical path folding element 2 and the lens group 3 are installed into the lens barrel 7, there is no need for additional assembly and alignment between the three components. This reduces the process of structural assembly and optical path alignment, which can save assembly time, reduce costs, and reduce the error of optical path alignment during assembly. This is beneficial to the overall optical path accuracy of the camera module 10 and improves the shooting effect.

[0208] In other embodiments, the lens barrel 7 can also be a modular structure. For example, the lens barrel 7 may include three parts: the optical lens 1, the first optical path folding element 2, and the lens group 3 are respectively installed into the three parts to form components, and then the three components are assembled to form a complete structure. In this case, the lens barrel 7 adopts a modular structure and then reassembles, which helps to reduce the design difficulty and the assembly difficulty of the module. As another example, the lens barrel 7 may also include two parts: one of the optical lens 1, the first optical path folding element 2, and the lens group 3 is installed in one part, and the other two are installed in the other part. It should be noted that the modular structure of the lens barrel 7 may also include more independent parts, depending on the actual application design, and is not limited here.

[0209] The camera module 10 may also include a lens cover 9, which is installed on the lens barrel 7, for example, it can be aligned with the first opening 711 of the lens barrel 7 to help fix the optical lens 1 in the lens barrel 7.

[0210] Understandable, Figure 2 and Figure 3 The images shown are only schematic representations of some of the components included in the camera module 10. The actual shape, size, position, and construction of these components are not subject to change. Figure 2 and Figure 3 Due to limitations, camera module 10 can also include, compared to Figure 2 and Figure 3 More or fewer parts.

[0211] In some other embodiments, the camera module 10 may not include the second optical path folding element 4. In this case, the image sensor 6 is placed vertically relative to the mid-frame. In some other embodiments, the camera module 10 may not include the first optical path folding element 2. In this case, light emitted from the optical lens 1 passes sequentially through the lens group 3 and the filter 5, and then exits to the image sensor 6. It is understood that the camera module 10 can be configured as a periscope structure by providing the aforementioned first optical path folding element 2 and / or second optical path folding element 4 and / or other optical path folding elements; the camera module 10 may be referred to as a periscope camera module 10. The camera module 10 may also be configured without the aforementioned first optical path folding element 2 and second optical path folding element 4, forming a vertical structure; the camera module 10 may be referred to as a vertical camera module 10.

[0212] In some other embodiments, the camera module 10 may also include a first driving component (not shown in the figure), which can drive one or more lenses in the lens group 3 to move along the optical axis to achieve focusing and / or zooming; or, the first driving component can drive the image sensor 6 to move along the optical axis to achieve focusing and / or zooming.

[0213] In some other embodiments, the camera module 10 may also include a second driving component (not shown in the figure), which can drive the first optical path folding element 2 to rotate to achieve optical image stabilization; or, the second driving component can drive one or more lenses in the lens group 3 to move in a direction perpendicular to the optical axis to achieve optical image stabilization; or, the second driving component can drive the image sensor 6 to rotate and / or move in a direction perpendicular to the optical axis to achieve optical image stabilization.

[0214] Please refer to the following: Figures 4A to 5B , Figure 4A yes Figure 2 A schematic diagram of the structure of the optical lens 1 in some embodiments. Figure 4B yes Figure 4A The diagram shows the structure of optical lens 1 from another viewpoint. Figure 5A yes Figure 4A The diagram shows the structure of the optical lens 1 after being cut along line BB in some embodiments. Figure 5B yes Figure 5A The diagram shows the light patterns of the optical lens 1 in some application scenarios.

[0215] In some embodiments, the lens body 11 of the optical lens 1 may further include a first transition surface 11e, which surrounds and connects the incident surface 11a and the second reflecting surface 11c. In this case, the first transition surface 11e is arranged around the second reflecting surface 11c, and the incident surface 11a is arranged around the first transition surface 11e. The first transition surface 11e can serve as a transition connection between the incident surface 11a and the second reflecting surface 11c, which is beneficial for the surface design of the incident surface 11a and the second reflecting surface 11c.

[0216] The lens body 11 of the optical lens 1 may further include a second transition surface 11f, which can be circumferentially connected between the first reflecting surface 11b and the emitting surface 11d. In this case, the second transition surface 11f is arranged around the emitting surface 11d, and the first reflecting surface 11b is arranged around the second transition surface 11f. The second transition surface 11f can serve as a transition connection between the first reflecting surface 11b and the emitting surface 11d, which is beneficial to the surface design of the first reflecting surface 11b and the emitting surface 11d.

[0217] It is understood that the first transition surface 11e may not form a clear dividing line with the incident surface 11a and the second reflecting surface 11c in terms of product appearance, and the second transition surface 11f may also not form a clear dividing line with the first reflecting surface 11b and the exiting surface 11d in terms of product appearance. Some of the accompanying drawings in this application have been schematically divided by dashed boxes, but this should not be construed as a strict limitation on the specific positions of the first transition surface 11e and the second transition surface 11f.

[0218] In some embodiments, a portion or all of the first transition surface 11e may be configured as a light-absorbing surface 111, and / or a portion or all of the second transition surface 11f may be configured as a light-absorbing surface 111. In this case, an annular light-absorbing surface 111 is provided between the incident surface 11a and the second reflecting surface 11c of the optical lens 1, and / or an annular light-absorbing surface 111 is provided between the first reflecting surface 11b and the exiting surface 11d. For example, Figure 4A and Figure 4B The diagram illustrates this by taking a portion of the first transition surface 11e as the light-absorbing surface 111 and a portion of the second transition surface 11f as the light-absorbing surface 111.

[0219] For example, the light-absorbing surface 111 can be configured as a surface structure capable of absorbing light. For instance, the light-absorbing surface 111 can be configured as a frosted surface, a blackened surface, or a microstructured surface. The frosted surface is a rough, matte surface, not a glossy surface. The color of the frosted surface can be white, gray, black, etc. In this embodiment, the "frosted" surface or structure can include a snowflake-like, whitish surface or structure, or a blackened surface or structure formed by further blackening the material during the frosting process. The blackened surface is a surface whose surface structure is black or nearly black through a blackening treatment. The microstructured surface has one or more microstructures. In this embodiment, the above-mentioned surface structure can achieve light absorption by dispersing light.

[0220] For example, a light-absorbing layer 119 may be provided on the light-absorbing surface 111. The light-absorbing layer 119 is capable of absorbing light. The light-absorbing layer 119 may cover all or part of the light-absorbing surface 111. In the accompanying drawings of this application embodiment, the light-absorbing layer 119 covering the entire area of ​​the light-absorbing surface 111 is used as an example for illustration.

[0221] For ease of explanation, the light-absorbing surface 111 and / or the structures fixed on the light-absorbing surface 111 (such as the light-absorbing layer 119) will be collectively referred to as light-absorbing structures. The light-absorbing structure can absorb light, and the light incident on the light-absorbing structure is partially or completely absorbed.

[0222] In this embodiment, by placing the light-absorbing surface 111 between the incident surface 11a and the second reflecting surface 11c and / or between the first reflecting surface 11b and the exiting surface 11d, a light-absorbing structure is provided at the non-effective optical surface of the optical lens 1, thereby effectively reducing stray light from the optical lens 1, improving the bokeh and background blur phenomena of the camera module 10, and enhancing the imaging quality of the camera module 10.

[0223] Among them, such as Figure 5B As shown, the incident surface 11a, the first reflecting surface 11b, the second reflecting surface 11c, and the exit surface 11d are the effective optical surfaces of the optical lens 1. Effective light enters the optical lens 1 through the incident surface 11a, is reflected sequentially by the first reflecting surface 11b and the second reflecting surface 11c, and then exits the optical lens 1 through the exit surface 11d. The light-absorbing surface 111 is offset from the effective optical surfaces to avoid affecting the normal propagation of effective light and to effectively absorb stray light.

[0224] The stray light emitted by the optical lens 1 can typically include direct-incident stray light, primary internal reflection stray light, and secondary internal reflection stray light. Direct-incident stray light refers to stray light that is directly incident on the first transition surface 11e of the optical lens 1 from the outside and then emitted from the second transition surface 11f or the exit surface 11d. Primary internal reflection stray light refers to stray light that undergoes a single reflection on the light-incident side surface of the lens body 11 after entering the optical lens 1. Secondary internal reflection stray light refers to stray light that undergoes two reflections on the light-incident side surface of the optical lens 1 after entering the optical lens 1. By placing the light-absorbing surface 111 between the incident surface 11a and the second reflecting surface 11c and / or between the first reflecting surface 11b and the exit surface 11d, the aforementioned stray light can be effectively absorbed. The scheme in which the light-absorbing surface 111 is located on one side surface of the lens body 11 of the optical lens 1 can absorb stray light once, while the scheme in which the light-absorbing surface 111 is located on both sides surface of the lens body 11 of the optical lens 1 can absorb stray light twice, resulting in a better absorption effect.

[0225] For example, the width of the light-absorbing surface 111 can be greater than or equal to 0.1 mm. For instance, the width can be, but is not limited to, 0.1 mm, 0.12 mm, 0.14 mm, 0.16 mm, 0.18 mm, 0.2 mm, or other values ​​greater than 0.1 mm. In this case, the light-absorbing surface 111 has better light absorption performance and is easier to manufacture. It is understood that, in the embodiments of this application, the width of the annular surface structure, unless otherwise specified, generally refers to the distance between the inner and outer ring edges of the surface.

[0226] The inner and outer ring edges of the light-absorbing surface 111 can form gaps with adjacent effective optical surfaces of the optical lens 1, for example, gaps greater than or equal to 0.1 mm, to reduce the risk of damage to the effective optical surfaces during the fabrication of the light-absorbing surface 111, thereby ensuring the optical reliability of the optical lens 1. In this case, if the first transition surface 11e has the light-absorbing surface 111, the width of the first transition surface 11e is greater than the width of the light-absorbing surface 111. If the second transition surface 11f has the light-absorbing surface 111, the width of the second transition surface 11f is greater than the width of the light-absorbing surface 111. For example, the widths of the first transition surface 11e and / or the second transition surface 11f can be greater than or equal to 0.2 mm.

[0227] The atomized surface can be formed through chemical atomization, physical atomization, or optical atomization processes.

[0228] For example, when the light-absorbing surface 111 is configured as a surface structure capable of absorbing light, the light-absorbing surface 111 has a certain thickness. For example, when a light-absorbing layer 119 is provided on the light-absorbing surface 111, the light-absorbing layer 119 can cover all or most of the area of ​​the light-absorbing surface 111 to ensure the light absorption effect. The thickness of the light-absorbing layer 119 can be greater than or equal to 0.005 mm. In this case, the structural reliability of the light-absorbing layer 119 is better, and the light absorption effect is also better.

[0229] For example, the lens body 11 has a first refractive index Nd1, and the light-absorbing layer 119 has a second refractive index Nd2, where |Nd1-Nd2| ≤ 0.1. For instance, |Nd1-Nd2| can be, but is not limited to, 0.1, 0.08, 0.06, 0.04, 0.02, 0.01, or other values ​​less than 0.1. In this embodiment, by setting the refractive index difference between the lens body 11 and the light-absorbing layer 119, the reflectivity of the inner surface of the light-absorbing layer 119 (i.e., the surface facing the lens body 11) is made below 0.5%, thereby achieving a better light absorption effect.

[0230] For example, the material of the light-absorbing layer 119 can be ink, paste, film, etc. In other embodiments, the light-absorbing layer 119 can also be made of other materials capable of absorbing light.

[0231] For example, the light-absorbing layer 119 can be formed on or assembled on the light-absorbing surface 111 by processes such as spraying, transfer printing, mud printing, coating, and film coating. The manufacturing process of the light-absorbing layer 119 is not strictly limited in this application embodiment.

[0232] For example, when the light-absorbing surface 111 is configured as a surface structure capable of absorbing light, the optical lens 1 can still be provided with a light-absorbing layer 119. In this case, the light-absorbing layer 119 is easier to fix onto the light-absorbing surface 111, the connection between the two is stable, and they can work together to achieve a better light absorption effect. Furthermore, the atomized structure or microstructure of the light-absorbing surface 111 can also be used for feature recognition, which is beneficial for assisting in locating the fabrication area of ​​the light-absorbing layer 119, resulting in higher processing precision for the light-absorbing layer 119. It is understood that when the optical lens 1 is provided with a light-absorbing layer 119, the light-absorbing surface 111 corresponding to the light-absorbing layer 119 can also be configured as a light-emitting surface.

[0233] In some embodiments, the lens body 11 of the optical lens 1 can be made of glass. In this case, the optical lens 1 has strong temperature resistance. Thus, when the optical lens 1 is used in the camera module 10, the risk of the optical lens 1 changing its surface shape due to the temperature rise of the camera module 10 is low. This makes the transmission and reflection functions of the optical lens 1 stable, which is beneficial to the optical path stability of the camera module 10 and thus ensures the imaging quality.

[0234] For example, the transformation temperature Tg of the material of the lens body 11 can be in the range of 200°C to 700°C or in the range of 400°C to 650°C, which can ensure that it will not deform and affect the surface shape when it is used in the camera module 10.

[0235] For example, the material of the lens body 11 can be, but is not limited to, fluorine crown glass, light crown glass, crown glass, phosphorus crown glass, heavy phosphorus crown glass, barium crown glass, heavy crown glass, lanthanum crown glass, crown flint glass, light flint glass, flint glass, barium flint glass, heavy barium flint glass, heavy flint glass, lanthanum flint glass, heavy lanthanum flint glass, etc.

[0236] In some embodiments, the lens body 11 of the optical lens 1 can be prepared by integral molding. In this case, the lens body 11 of the optical lens 1 is an integrally molded structural component. In this embodiment, since the lens body 11 can be prepared by integral molding, it is possible to ensure that the surface accuracy of the lens body 11 of the optical lens 1 is high, the relative positions of multiple effective optical surfaces are accurate, and the overall structural stability of the lens body 11 is high. In addition, since glass has high hardness, compared with cutting, integral molding can improve processing efficiency and reduce processing difficulty.

[0237] In some embodiments, such as Figure 5A As shown, the lens body 11 of the optical lens 1 may further include a first bearing surface 11g and a second bearing surface 11h. The first bearing surface 11g is arranged around the incident surface 11a, and the second bearing surface 11h is arranged around the first reflecting surface 11b. The first bearing surface 11g and the second bearing surface 11h are arranged opposite to each other. The first bearing surface 11g and the incident surface 11a may be located on the same side surface of the lens body 11, and the second bearing surface 11h and the exiting surface 11d may be located on the same side surface of the lens body 11.

[0238] In this embodiment, the design of the first bearing surface 11g and the second bearing surface 11h is beneficial to positioning the lens body 11 of the optical lens 1, thereby improving the fullness of the surface shape of the incident surface 11a and the first reflecting surface 11b formed by molding.

[0239] For example, the width of the first bearing surface 11g can be greater than or equal to 0.3mm. For instance, the width of the first bearing surface 11g can be, but is not limited to, 0.3mm, 0.32mm, 0.38mm, 0.4mm, or other values ​​greater than 0.3mm.

[0240] For example, the width of the second bearing surface 11h can be greater than or equal to 0.2 mm. For instance, the width of the second bearing surface 11h can be, but is not limited to, 0.2 mm, 0.22 mm, 0.24 mm, 0.26 mm, 0.28 mm, 0.3 mm, or other values ​​greater than 0.2 mm.

[0241] Specifically, the ratio of the width of the first bearing surface 11g to the distance between the first bearing surface 11g and the second bearing surface 11h is less than or equal to 2; the ratio of the width of the second bearing surface 11h to the distance between the first bearing surface 11g and the second bearing surface 11h is less than or equal to 2. If the widths of the first bearing surface 11g and the second bearing surface 11h are too small, it will be difficult to place or remove the lens body 11; if they are too large, they may encroach on the dimensions of other structures and increase the risk of breakage of these structures.

[0242] It is understandable that the design of the first bearing surface 11g and the second bearing surface 11h can serve as positioning support for the subsequent processing of the lens body 11. For example, when the lens body 11 is coated or laser-treated, the lens body 11 can be stably supported in the tray by the first bearing surface 11g and / or the second bearing surface 11h.

[0243] In some embodiments, the lens body 11 may further include a third transition surface 11i, which surrounds and connects the incident surface 11a and the first bearing surface 11g. In this embodiment, the design of the third transition surface 11i serves to transitionally connect the incident surface 11a and the first bearing surface 11g, which is beneficial to improving the fullness of the molded incident surface 11a. It is understood that the third transition surface 11i and the incident surface 11a and the first bearing surface 11g may not form a clear dividing line in the appearance of the product.

[0244] In some embodiments, the lens body 11 may further include a fourth transition surface 11j, which surrounds and connects the first reflective surface 11b and the second support surface 11h. In this embodiment, the design of the fourth transition surface 11j serves to transitionally connect the first reflective surface 11b and the second support surface 11h, which is beneficial to improving the fullness of the molded first reflective surface 11b. It is understood that the fourth transition surface 11j and both the first reflective surface 11b and the second support surface 11h may not form a clear dividing line in the product appearance.

[0245] It is understood that in the embodiments of this application, the first transition surface 11e, the second transition surface 11f, the third transition surface 11i, and the fourth transition surface 11j of the lens body 11 mainly serve as surface transitions and have a certain width to improve the forming yield of the optical effective surface of the lens body 11. For example, the width of the first transition surface 11e and the width of the second transition surface 11f can be greater than or equal to 0.2 mm, and the widths of the third transition surface 11i and the fourth transition surface 11j can be greater than or equal to 0.1 mm. The embodiments of this application do not strictly limit these dimensions. In some optical lenses 1 with smaller outer diameters, the dimensions of the above-mentioned transition surfaces can be further reduced. For example, the width of the first transition surface 11e and the width of the second transition surface 11f can be greater than or equal to 0.1 mm.

[0246] The width of the first transition surface 11e can be less than or equal to 1 / 20 of the outer diameter of the incident surface 11a in the radial direction of the optical lens 1, so as to avoid the incident surface 11a being too small due to the size of the first transition surface 11e being too large, which helps to ensure the resolution of the optical lens 1.

[0247] The width of the second transition surface 11f can be less than or equal to 1 / 20 of the outer diameter of the first reflecting surface 11b in the radial direction of the optical lens 1, so as to avoid the first reflecting surface 11b being too small due to the size of the second transition surface 11f being too large, which helps to ensure the resolution of the optical lens 1.

[0248] The third transition surface 11i typically includes a buffer surface and a radius (R-angle). The buffer surface connects to the incident surface 11a, and the radius connects to the first bearing surface 11g. The buffer surface prevents the radius from damaging the incident surface 11a. The radius needs to be designed with appropriate dimensions to avoid insufficient mold precision due to excessive size, and to avoid damage to the incident surface 11a and thinning of the lens due to excessive size. In some examples, the third transition surface 11i can be less than or equal to 0.4 mm.

[0249] The fourth transition surface 11j typically includes a buffer surface and a radius (R-angle). The buffer surface connects to the first reflecting surface 11b, and the radius (R-angle) connects to the second supporting surface 11h. The buffer surface prevents the radius (R-angle) from damaging the first reflecting surface 11b. The radius (R-angle) needs to be designed with appropriate dimensions to avoid insufficient mold precision due to its small size, and to avoid damage to the first reflecting surface 11b and thinning of the lens due to its large size. In some examples, the fourth transition surface 11j can be less than or equal to 0.4 mm.

[0250] It is understood that in some embodiments of this application, the third transition surface 11i and / or the fourth transition surface 11j may also be provided with a light-absorbing surface and / or a light-absorbing layer to absorb stray light from the optical lens 1 and improve imaging quality.

[0251] In some embodiments, the lens body 11 may further include a peripheral side surface 11k, which is circumferentially connected between the two side surfaces of the lens body 11. For example, the peripheral side surface 11k may be connected between the first bearing surface 11g and the second bearing surface 11h. The peripheral side surface 11k may include a first side surface 11m, a second side surface 11n, and a third side surface 11o connected sequentially along the axial direction. The first side surface 11m is closer to the first bearing surface 11g than the third side surface 11o, and the first side surface 11m protrudes relative to the third side surface 11o.

[0252] In this embodiment, the first side surface 11m protrudes from the third side surface 11o, so that the portion of the lens body 11 that protrudes from the third side surface 11o forms a volume buffer 11p. Due to the presence of the volume buffer 11p, the surface shapes of the incident surface 11a, the first reflecting surface 11b, the second reflecting surface 11c, and the exit surface 11d can be more complete, even reaching 100% completeness, during the molding process of the lens body 11. Furthermore, due to the presence of the volume buffer 11p, there is no need for high-precision control of the dimensional tolerances of the incoming material of the lens body 11, thereby reducing the difficulty of controlling the incoming material and improving production efficiency and the yield of the lens body 11.

[0253] Please refer to the following: Figure 5A and Figure 6 , Figure 6 yes Figure 2 A schematic diagram of the structure of the optical lens 1 in some other embodiments. Wherein, Figure 6 The diagram illustrates the structures of several optical lenses 1. The main difference between these optical lenses 1 and between them and the optical lenses 1 in the previous embodiment lies in the shape of their effective optical surfaces.

[0254] In some embodiments, the incident surface 11a of the optical lens 1 can be a plane, a convex surface, or a concave surface; and / or, the first reflecting surface 11b can be a plane, a convex surface, or a concave surface; and / or, the second reflecting surface 11c can be a plane, a convex surface, or a concave surface; and / or, the exiting surface 11d can be a plane, a convex surface, or a concave surface. For example, as Figure 5A As shown, the multiple effective optical surfaces of the optical lens 1 can be: the incident surface 11a is a convex surface, the first reflecting surface 11b is a convex surface, the second reflecting surface 11c is a concave surface, and the exiting surface 11d is a concave surface. For example... Figure 6 As shown in (a), the multiple effective optical surfaces of the optical lens 1 can be: the incident surface 11a is a convex surface, the first reflecting surface 11b is a convex surface, the second reflecting surface 11c is a concave surface, and the exiting surface 11d is a plane. Figure 6 As shown in (b), the multiple effective optical surfaces of the optical lens 1 can be: the incident surface 11a is a convex surface, the first reflecting surface 11b is a convex surface, the second reflecting surface 11c is a concave surface, and the exiting surface 11d is a convex surface. Figure 6As shown in (c), the multiple effective optical surfaces of the optical lens 1 can be: the incident surface 11a is a plane, the first reflecting surface 11b is a convex surface, the second reflecting surface 11c is a concave surface, and the exiting surface 11d is a convex surface. Figure 6 As shown in (d), the multiple effective optical surfaces of the optical lens 1 can be: the incident surface 11a is a plane, the first reflecting surface 11b is a convex surface, the second reflecting surface 11c is a concave surface, and the exiting surface 11d is a concave surface. Figure 6 As shown in (e), the multiple effective optical surfaces of the optical lens 1 can be: the incident surface 11a is a plane, the first reflecting surface 11b is a convex surface, the second reflecting surface 11c is a concave surface, and the exit surface 11d is a plane. It is understood that the surface shapes of the several effective optical surfaces of the optical lens 1 can be flexibly combined and designed, and this embodiment of the application does not impose strict limitations on this. In particular, when at least one of the optical surfaces of the optical lens 1 is a plane, it is beneficial to reduce the processing difficulty of the optical lens 1.

[0255] Please see Figure 7A , Figure 7A yes Figure 2 A schematic diagram of the structure of the optical lens 1 in some other embodiments. Figure 7A The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the parts that are the same will not be repeated.

[0256] In some embodiments, the lens body 11 of the optical lens 1 may also be assembled from multiple structures. For example, the lens body 11 may be a combination of two types of lenses. For instance, the lens body 11 may include a first lens body 112, a dielectric layer 113, and a second lens body 114 stacked sequentially. The incident surface 11a and the second reflecting surface 11c are located on the first lens body 112, the first reflecting surface 11b and the exiting surface 11d are located on the second lens body 114, the dielectric layer 113 includes a first surface 1131 connecting the first lens body 112 and a second surface 1132 connecting the second lens body 114, the first surface 1131 and the second surface 1132 are parallel to each other, and the dielectric layer 113 is made of a light-transmitting material.

[0257] In this embodiment, the lens body 11 of the optical lens 1 has a modular structure, offering high design flexibility. For example, the first lens body 112 and the second lens body 114 can be made of the same material or different materials; for instance, they can be made of glass and plastic respectively, forming a glass-plastic composite structure. Of course, in other embodiments, the first lens body 112 and the second lens body 114 can both be made of glass or both of plastic.

[0258] The dielectric layer 113 can be made of a light-transmitting adhesive or other light-transmitting dielectric materials. This application does not strictly limit this.

[0259] For example, the thickness of the dielectric layer 113 is less than or equal to 100 μm (micrometers), such as 6 μm, 8 μm, 10 μm, 13 μm, 20 μm, 25 μm, 30 μm, 45 μm, 58 μm, 75 μm, etc. The thickness of the dielectric layer 113 is the distance between the first surface 1131 and the second surface 1132. In some examples, the thickness of the dielectric layer 113 may be less than or equal to 30 μm.

[0260] In this embodiment, by setting the thickness of the dielectric layer 113, the risk of eccentricity or tilting of the first mirror body 112 and the second mirror body 114 is reduced, thereby improving the assembly accuracy of the lens body 11 of the optical lens 1 and ensuring its optical reliability. At the same time, a thinner dielectric layer 113 can also avoid the problem of large optical path difference due to large refractive index deviation, thus ensuring the imaging quality of the optical lens 1.

[0261] The thickness of the dielectric layer 113 can be greater than or equal to 5 μm. In this case, the dielectric layer 113 has a certain thickness, which can avoid phenomena such as local missing adhesive or air bubbles due to being too thin, thus ensuring better bonding performance.

[0262] In some examples, the thickness of the dielectric layer 113 can be between 5 μm and 15 μm. In this case, the optical lens 1 has a good product yield and good imaging quality.

[0263] For example, the first mirror body 112 has a third refractive index Nd3, and the dielectric layer 113 has a fourth refractive index Nd4, where 0.9 ≤ Nd4 / Nd3 ≤ 1.1; the second mirror body 114 has a fifth refractive index Nd5, where 0.9 ≤ Nd4 / Nd5 ≤ 1.1. In this way, the difference between the refractive indices of the two mirror bodies and the refractive index of the dielectric layer 113 is controlled within 10%, ensuring that the refractive indices are close and effectively reducing the optical path difference, thereby ensuring the imaging quality of the optical lens 1. The third refractive index Nd3 and the fifth refractive index Nd5 may be equal or unequal.

[0264] Specifically, when the light-absorbing surface 111 on the first transition surface 11e is provided with a light-absorbing layer 119, the absolute value of the difference between the refractive index of the first mirror body 112 and the refractive index of the light-absorbing layer 119 is less than or equal to 0.1 mm, so that the reflectivity of the inner surface of the light-absorbing layer 119 is less than 0.5%, thereby achieving a better light absorption effect. When the light-absorbing surface 111 on the second transition surface 11f is provided with a light-absorbing layer 119, the absolute value of the difference between the refractive index of the second mirror body 114 and the refractive index of the light-absorbing layer 119 is less than or equal to 0.1 mm, so that the reflectivity of the inner surface of the light-absorbing layer 119 is less than 0.5%, thereby achieving a better light absorption effect.

[0265] Please refer to the following: Figures 7A to 7C , Figure 7B yes Figure 2 A schematic diagram of the structure of the optical lens 1 in some other embodiments. Figure 7C yes Figure 2 A schematic diagram of the structure of the optical lens 1 in some other embodiments. Figure 7B The optical lens 1 shown is Figure 7C The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences, and the same parts will not be repeated.

[0266] exist Figure 7A In the optical lens 1 shown, the first surface 1131 and the second surface 1132 of the dielectric layer 113 are both planar. In some examples, the plane of the dielectric layer 113 is perpendicular to the optical axis 1o of the optical lens 1, in which case both the first surface 1131 and the second surface 1132 are perpendicular to the optical axis 1o of the optical lens 1.

[0267] exist Figure 7B In the optical lens 1 shown, the first surface 1131 and the second surface 1132 of the dielectric layer 113 are both curved surfaces, for example, they can be arc surfaces.

[0268] exist Figure 7C In the optical lens 1 shown, the first surface 1131 and the second surface 1132 of the dielectric layer 113 are both sawtooth surfaces. At this time, the first lens body 112 and the second lens body 114 can present a sawtooth interlocking structure.

[0269] It is understood that the dielectric layer 113 may also take on other structures, and the embodiments of this application do not strictly limit this.

[0270] It is understood that the multiple lens bodies of the optical lens 1 with the above-mentioned combined structure can be assembled using a bonding process. In other embodiments, the multiple lens bodies can also be assembled using bonding, laser welding, interlocking, or other processes. For example, the optical lens 1 may include a first lens body 112 and a second lens body 114, excluding the dielectric layer 113. The first lens body 112 and the second lens body 114 are directly bonded together, optically bonded, or otherwise assembled.

[0271] Please refer to the following: Figure 7A and Figure 8 , Figure 8 yes Figure 2 A schematic diagram of the structure of the optical lens 1 in some other embodiments. Wherein, Figure 8 The diagram illustrates the structures of several optical lenses 1. The main difference between these optical lenses 1 and between them and the optical lenses 1 in the previous embodiment lies in the shape of their effective optical surfaces.

[0272] In this embodiment, when the optical lens 1 adopts a combined structure, multiple effective optical surfaces of the optical lens 1 can be designed by designing the surfaces of the first lens body 112 and the second lens body 114, respectively. These multiple effective optical surfaces can be flexibly combined into concave, convex, or planar surfaces, for example... Figure 7A and Figure 8 (a) to (e) illustrate six different surface combinations. The surface of the effective optical surface of the optical lens 1 is relatively easy to process and realize. Figure 7A and Figure 8 The surface profiles of optical lenses 1 shown in (a) to (e) can be found in the following references. Figure 5A and Figure 6 The descriptions in (a) to (e) are not repeated here.

[0273] The following will illustrate some implementation methods of the light-absorbing structure of the optical lens 1. These implementation methods of the light-absorbing structure can be flexibly applied to the optical lens 1 described above, including at least the flexibility of the position setting (i.e., setting it on which one or several transition surfaces) and the flexibility of the combination method (i.e., using which one or several light-absorbing structures).

[0274] Please see Figure 4A and Figure 5A In some embodiments, the light-absorbing surface 111 may be annular. The cross-sectional shape of the light-absorbing surface 111 in a section parallel to the optical axis 1o of the optical lens 1 may be a straight line, an arc, a spline curve, a polyline segment, or other shapes; this application does not impose strict limitations on these aspects.

[0275] Please see Figure 9 , Figure 9 yes Figure 2 A schematic diagram of the structure of the optical lens 1 in some other embodiments. Figure 9 The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the parts that are the same will not be repeated.

[0276] In some embodiments, the light-absorbing surface 111 may also be in the shape of a petal ring. Specifically, both the inner and outer ring edges of the light-absorbing surface 111 may be petal rings, or one of them may be petal rings. The petal shape can also be understood as a closed, wavy ring. In this embodiment, by setting the light-absorbing surface 111 as a petal ring, the shape of stray light from the optical lens 1 can be harmonized, making the shape of unabsorbed stray light regular, which is beneficial for improving the imaging quality of the optical lens 1 and the camera module 10.

[0277] In other embodiments, the light-absorbing surface 111 may also be a serrated ring. Specifically, both the inner and outer ring edges of the light-absorbing surface 111 may be serrated rings, or one of them may be serrated rings. In this embodiment, by setting the light-absorbing surface 111 as a serrated ring, the shape of stray light from the optical lens 1 can be harmonized, making the shape of unabsorbed stray light regular, which is beneficial to improving the imaging quality of the optical lens 1 and the camera module 10.

[0278] Understandably, in some other embodiments, the light-absorbing surface 111 may also be configured as a ring with other structures.

[0279] Please see Figure 10 , Figure 10 yes Figure 2 A partial structural schematic diagram of the optical lens 1 in some other embodiments. Figure 10 The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the parts that are the same will not be repeated. Among them, Figure 10 The dashed line illustrates part of the propagation path of light in optical lens 1.

[0280] In some embodiments, at least a portion of the light-absorbing surface 111 is recessed into the interior of the lens body 11 to form a groove 1111. Exemplarily, the light-absorbing layer 119 is fixed to the groove wall of the groove 1111. In this case, the light-absorbing layer 119 can absorb light incident on the groove 1111 to reduce stray light from the optical lens 1. Furthermore, the groove 1111 increases the light-absorbing area of ​​the light-absorbing layer 119, which helps ensure the stray light reduction effect of the light-absorbing layer 119.

[0281] When the groove 1111 includes the entire area of ​​the light-absorbing surface 111, the light-absorbing layer 119 covers the groove wall of the groove 1111. When the groove 1111 includes only a portion of the light-absorbing surface 111, the light-absorbing layer 119 fixes the groove wall of the groove 1111 and is partially located outside the groove 1111.

[0282] When the light-absorbing layer 119 uses ink, the groove 1111 can reduce the risk of ink overflowing onto the effective optical surface of the optical lens 1, thereby improving the product yield of the optical lens 1.

[0283] For example, the edge of the groove 1111 has a safety distance between it and the adjacent effective optical surface. This distance can be greater than or equal to 0.1 mm. For instance, the distance S1 between the groove 1111 located on the second transition surface 11f and the first reflecting surface 11b is ≥ 0.1 mm, and the distance S2 between it and the exiting surface 11d is ≥ 0.1 mm. Similarly, the distance between the groove 1111 located on the first transition surface 11e and the incident surface 11a and the second reflecting surface 11c is also greater than or equal to 0.1 mm.

[0284] In this embodiment, by setting a safety distance between the groove 1111 and the effective optical surface, the safety distance can effectively avoid the risk of edge chipping during the processing of the groove 1111 due to excessive manufacturing tolerance, thus helping to ensure the product yield of the optical lens 1.

[0285] For example, the cross-sectional shape of the groove 1111 can be U-shaped, V-shaped, sawtooth-shaped, or semi-circular, or any other arbitrary shape, and this application does not impose strict limitations on it.

[0286] For example, when both the first transition surface 11e and the second transition surface 11f are provided with light-absorbing surfaces 111, grooves 1111 can be provided on both light-absorbing surfaces 111 simultaneously, or one of the light-absorbing surfaces 111 may be provided with a groove 1111. When both light-absorbing surfaces 111 are provided with grooves 1111, the shape and / or size of the two grooves 1111 may be different. For example, as... Figure 10 As shown, both the first transition surface 11e and the second transition surface 11f are provided with light-absorbing surfaces 111. The depth of the groove 1111 provided on the first transition surface 11e can be less than the depth of the groove 1111 provided on the second transition surface 11f.

[0287] Please see Figure 11 , Figure 11 yes Figure 2 A partial structural schematic diagram of the optical lens 1 in some other embodiments. Figure 11 The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the parts that are the same will not be repeated. Among them, Figure 11 The dashed line illustrates part of the propagation path of light in optical lens 1.

[0288] In some embodiments, at least a portion of the light-absorbing surface 111 is recessed into the lens body 11 to form a groove 1111. The optical lens 1 includes a buffer adhesive 115, which fills the groove 1111. The buffer adhesive 115 can be made of a soft material, such as silicone. In this embodiment, the buffer adhesive 115 absorbs stress and acts as a buffer, thereby reducing the risk of the optical lens 1 breaking and improving the structural reliability of the optical lens 1.

[0289] In some examples, the buffer adhesive 115 can be a non-transparent adhesive. This non-transparent adhesive can absorb and block light, helping to reduce stray light from the optical lens. The non-transparent adhesive can be, for example, black glue.

[0290] Please see Figure 12 , Figure 12 yes Figure 2 A partial structural schematic diagram of the optical lens 1 in some other embodiments. Figure 12 The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the parts that are the same will not be repeated. Among them, Figure 12 The dashed line illustrates part of the propagation path of light in optical lens 1.

[0291] In some embodiments, at least a portion of the light-absorbing surface 111 is recessed into the interior of the lens body 11 to form a groove 1111. The light-absorbing layer 119 is fixed to the groove wall of the groove 1111. The optical lens 1 includes a buffer adhesive 115, which connects the light-absorbing layer 119. The buffer can be a non-transparent adhesive or a transparent adhesive; this embodiment does not strictly limit the type of adhesive used.

[0292] In this embodiment, the optical lens 1 can absorb stray light through the light-absorbing layer 119 and absorb stress through the buffer adhesive 115, thereby improving the imaging quality and structural reliability of the optical lens 1.

[0293] Please see Figure 13 , Figure 13 yes Figure 2 A partial structural schematic diagram of the optical lens 1 in some other embodiments. Figure 13 The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the parts that are the same will not be repeated. Among them, Figure 13 The dashed line illustrates part of the propagation path of light in optical lens 1.

[0294] In some embodiments, the light-absorbing surface 111 may include an inner ring region 1112, a middle region 1113, and an outer ring region 1114 connected in sequence. Both the inner ring region 1112 and the outer ring region 1114 are recessed into the lens body 11 to form an ink overflow groove 1115. In this case, the ink overflow groove 1115 formed by the inner ring region 1112 and the ink overflow groove 1115 formed by the outer ring region 1114 are both annular, separating the middle region 1113 from the effective optical surface of the optical lens 1. The light-absorbing layer 119 may be an ink layer, and the light-absorbing layer 119 is at least disposed in the middle region 1113 and the ink overflow groove 1115.

[0295] In this embodiment, during the forming process of the light-absorbing layer 119, for example when ink is sprayed onto the light-absorbing surface 111, since the inner ring region 1112 and the outer ring region 1114 are provided with ink overflow grooves 1115, when the ink flows from the middle region 1113 to both sides, it accumulates in the ink overflow grooves 1115. The risk of ink flowing across the ink overflow grooves 1115 to the effective optical surface is low. The blocking effect of the ink overflow grooves 1115 is obvious, which can prevent the ink from flowing to the effective optical curved surface next to the light-absorbing surface 111, avoid contaminating the effective optical curved surface of the lens body 11, and improve the product yield and optical reliability of the optical lens 1.

[0296] For example, the depth of the ink overflow groove 1115 can be greater than or equal to 0.01 mm, and the width can be greater than or equal to 0.05 mm. In this case, the ink overflow groove 1115 is easier to process, has a larger capacity, and provides better ink blocking effect. For example, the cross-sectional shape of the ink overflow groove 1115 can be U-shaped, V-shaped, W-shaped, or semi-circular, etc., and the embodiments of this application do not strictly limit it in this way.

[0297] For example, there is a safety distance between the edge of the ink overflow groove 1115 and the adjacent effective optical surface. This distance can be greater than or equal to 0.1 mm. In this case, by setting a safety distance between the ink overflow groove 1115 and the effective optical surface, the safety distance can effectively avoid the risk of edge chipping during the processing of the ink overflow groove 1115 due to excessive manufacturing tolerances, thus helping to ensure the product yield of the optical lens 1.

[0298] Please refer to the following: Figure 13 and Figure 14 , Figure 14 yes Figure 2 A partial structural schematic diagram of the optical lens 1 in some other embodiments. Figure 14 The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the parts that are the same will not be repeated. Among them, Figure 14 The dashed line illustrates part of the propagation path of light in optical lens 1.

[0299] exist Figure 13 In the illustrated embodiment, ink overflow grooves 1115 are provided on both side edge regions of the light-absorbing surface 111 (i.e., the inner ring region 1112 and the outer ring region 1114). In other embodiments, such as Figure 14 As shown, the light-absorbing surface 111 may have an ink overflow groove 1115 on one side edge region, or neither side edge region of the light-absorbing surface 111 may have an ink overflow groove 1115, and the surface may smoothly transition to the effective optical surface. When an ink overflow groove 1115 is provided on one side edge region of the light-absorbing surface 111, it is not limited to being provided in the inner ring region 1112 or the outer ring region 1114.

[0300] When the dimensions of the first transition surface 11e and / or the second transition surface 11f are limited, the width of the corresponding light-absorbing surface 111 is relatively small, and therefore, the following can be adopted: Figure 14 The structure reduces the damage to the original curved surface contour of the lens body 11 caused by the slotted structure, thereby ensuring the surface accuracy of the lens body 11 during molding and improving the product yield of the optical lens 1. For example Figure 14 In the first transition surface 11e, the light-absorbing surface 111 adopts a structure without ink overflow groove 1115, and the light-absorbing surface 111 on the second transition surface 11f adopts a structure with a single-sided ink overflow groove 1115.

[0301] The light-absorbing layer 119 can be made of a material with low fluidity, such as clay. The light-absorbing layer 119 can be formed using processes such as transfer printing. Because the light-absorbing layer 119 has low fluidity, the manufacturing process requires high precision, and the minimum process width requirement is low. Therefore, it can be processed on a light-absorbing surface 111 with a narrow width, for example, on a light-absorbing surface 111 with a width less than or equal to 0.5 mm. This is advantageous for use in optical lenses 1 with small outer diameters.

[0302] In the design where an ink overflow groove 1115 is provided on one side of the light-absorbing surface 111, the light-absorbing layer 119 can also be made of ink material. When the light-absorbing layer 119 is made of ink material, the minimum width of the light-absorbing layer 119 is usually greater than 0.25 mm, and the width of the light-absorbing surface 111 is usually greater than 0.5 mm.

[0303] Where the dimensions on the first transition surface 11e and / or the second transition surface 11f are sufficient, but the first transition surface 11e and / or the second transition surface 11f are not convex relative to their adjacent effective optical surfaces, but are flush or concave, the light-absorbing layer 119 can also be made of ink material, and the light-absorbing surface 111 can also adopt a single-sided ink overflow groove 1115 scheme or a scheme without ink overflow groove 1115 scheme. In this case, the risk of ink flowing to the effective optical surface is low, and the forming accuracy is high.

[0304] Please see Figure 15 , Figure 15 yes Figure 2 A schematic diagram of the structure of the optical lens 1 in some other embodiments. Figure 15 The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the parts that are the same will not be repeated. Among them, Figure 15 The dashed line with arrows illustrates part of the propagation path of light in optical lens 1.

[0305] In some embodiments, the light-absorbing surface 111 employs a microstructured surface. The microstructured surface may include raised microstructures 1116. The microstructure 1116 includes a first surface 1116a and a second surface 1116b, both of which are annular. The first surface 1116a may be located inside the second surface 1116b, or may be disposed around the second surface 1116b, for example... Figure 15 The illustration takes the example of the first surface 1116a being located inside the second surface 1116b. The angle between the first surface 1116a and the second surface 1116b is within the range of 30° to 120°. Examples include 45°, 60°, 78°, 85°, 90°, 96°, and 110°.

[0306] In this embodiment, the angle between the first surface 1116a and the second surface 1116b of the microstructure 1116 of the light-absorbing surface 111 is in the range of 30° to 120° and is V-shaped. After the light rays incident on the light-absorbing surface 111 are reflected by the first surface 1116a and the second surface 1116b, they are refracted back along the original path, thereby avoiding the light rays from continuing to propagate forward inside the lens body 11 after being reflected at the first transition surface 11e, thus forming stray light. This helps to reduce stray light in the optical lens 1 and improve the imaging quality.

[0307] For example, the absolute value of the difference between the width of the first surface 1116a and the width of the second surface 1116b is less than or equal to 100 μm. For example, the absolute value of the difference can be, but is not limited to, 0, 10 μm, 40 μm, 60 μm, 80 μm, 100 μm, or other values ​​less than 100 μm.

[0308] In this embodiment, the absolute value of the difference between the width of the first surface 1116a and the width of the second surface 1116b satisfies the above design, which enables most of the light rays inside the lens body 11 to be reflected from the first surface 1116a to the second surface 1116b and return along the same path, regardless of the angle at which the light rays are incident on the microstructure 1116. Alternatively, the light rays can be reflected from the second surface 1116b to the first surface 1116a and return along the same path. This avoids the situation where the size difference between the first surface 1116a and the second surface 1116b is too large, preventing the light rays from being reflected between the two surfaces. This improves the effect of the light-absorbing surface 111 in eliminating stray light.

[0309] It is understood that the microstructure 1116 of the light-absorbing surface 111 located on the first transition surface 11e and the microstructure 1116 of the light-absorbing surface 111 located on the second transition surface 11f may be the same or different in size and angle. They can be flexibly set according to the stray light environment at the location of the light-absorbing surface 111. This application embodiment does not strictly limit this.

[0310] In some other embodiments, the microstructure surface may also include microstructures of other shapes. When light is incident on the microstructure, it is reflected twice at the microstructure to reduce the light intensity. The microstructure has two reflective surfaces. For example, the microstructure may be U-shaped, semi-circular, rectangular, etc. The embodiments of this application do not strictly limit the specific shape and size of the microstructure surface.

[0311] Please see Figure 16 , Figure 16 yes Figure 2 A partial structural schematic diagram of the optical lens 1 in some other embodiments. Figure 16 The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the parts that are the same will not be repeated. Among them, Figure 16 The dashed lines and dashed lines with arrows illustrate part of the propagation path of light in optical lens 1.

[0312] In the previous embodiment, the light-absorbing structure of the optical lens 1 is mainly formed on the surface of the optical lens 1. The following will describe the structure of the light-absorbing structure of the optical lens 1 being disposed inside the optical lens 1.

[0313] In some embodiments, a light-blocking structure 116 may be provided inside the lens body 11 of the optical lens 1, located between the incident surface 11a and the exit surface 11d. The light-blocking structure 116 is positioned on the stray light propagation path of the optical lens 1, thus blocking the propagation path of the effective light. For example, the light-blocking structure 116 may be located close to the first transition surface 11e or close to the second transition surface 11f.

[0314] In this embodiment, the light-blocking structure 116 can disperse and absorb light, preventing it from continuing to propagate forward, thereby eliminating stray light from the optical lens 1 and improving image quality. The light-blocking structure 116 can be ring-shaped, surrounding the optical axis 1o of the optical lens 1 (see reference). Figure 5A This setting allows for better blocking of stray light. The light-blocking structure 116 can also be a light-absorbing structure of the optical lens 1.

[0315] For example, the light-blocking structure 116 can be a frosted structure or a blackened structure. In some examples, the frosted or blackened structure can be formed inside the lens body 11 by laser engraving. It is understood that other processes can also be used to achieve the frosted or blackened structure, and the embodiments of this application do not strictly limit this.

[0316] For example, the light-blocking structure 116 can be a closed structure, a planar structure, or other three-dimensional structures. For instance, the cross-sectional shape of the light-blocking structure 116 can be a straight line, a triangle, a T-shape, a V-shape, a spiral, a comb shape, etc., and this embodiment does not strictly limit this. For example, in... Figure 16 The optical lens 1 shown includes two light blocking structures 116. One light blocking structure 116 is disposed near the first transition surface 11e, and the cross-sectional shape of the light blocking structure 116 can be triangular. The other light blocking structure 116 is disposed near the second transition surface 11f, and the cross-sectional shape of the light blocking structure 116 can be V-shaped.

[0317] In some other embodiments, the light blocking structure 116 may also be a light blocking component embedded in the lens, such as a light blocking film.

[0318] In the embodiments of this application, the optical lens 1 can achieve stray light elimination solely through the surface light-absorbing structure, or solely through the internal light-absorbing structure, or it can achieve stray light elimination by combining the surface light-absorbing structure with the internal light-absorbing structure. The embodiments of this application do not impose strict limitations on this.

[0319] Please see Figure 17 , Figure 17 yes Figure 2 A schematic diagram of the structure of the optical lens 1 in some other embodiments. Figure 17 The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the parts that are the same will not be repeated.

[0320] In some embodiments, a light-absorbing surface 111 is provided between the incident surface 11a and the second reflecting surface 11c. The light-absorbing surface 111 can be a frosted structure or a blackened structure. A light-absorbing layer 119 may be fixed on the light-absorbing surface 111, or the light-absorbing layer 119 may not be fixed. Figure 17 The example shown is an optical lens 1 with a fixed light-absorbing layer 119. The optical lens 1 is provided with a light-blocking structure 116, which is located between the incident surface 11a and the exit surface 11d, and is positioned close to the second transition surface 11f. The light-blocking structure 116 is arranged around the optical axis 1o of the optical lens 1.

[0321] For example, the light blocking structure 116 may include a first structure 1161 and a second structure 1162. The first structure 1161 may extend along a direction parallel to the optical axis 1o of the optical lens 1, and the extension direction of the second structure 1162 may intersect with the extension direction of the first structure 1161. Figure 17 The diagram illustrates this by taking the example that the extension direction of the first structure 1161 can be perpendicular to the extension direction of the second structure 1162.

[0322] In this embodiment, the L-shaped structure formed by the first structure 1161 and the second structure 1162 is beneficial to increasing the area of ​​the light blocking structure 116 that blocks stray light, and thus improving the stray light elimination effect.

[0323] The second structure 1162 can be plate-shaped. The side of the first structure 1161 facing away from the optical axis 1o of the optical lens 1 can be provided with a sawtooth structure so that, on the path from the incident surface 11a to the exit surface 11d, the light can be reflected multiple times between the first structure 1161 and the second structure 1162 at the light blocking structure 116, thereby reducing the risk of stray light formation or even eliminating stray light.

[0324] Please see Figure 18 , Figure 18 yes Figure 2 A partial structural schematic diagram of the optical lens 1 in some other embodiments. Figure 18 The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the parts that are the same will not be repeated. Among them, Figure 18 The dashed lines and dashed lines with arrows illustrate part of the propagation path of light in optical lens 1.

[0325] In the preceding embodiments, the implementation scheme of the light-absorbing structure in the integrally formed structure of the lens body 11 of the optical lens 1 was mainly described. The implementation scheme of the light-absorbing structure in the combined structure of the lens body 11 of the optical lens 1 will be described below.

[0326] In some embodiments, the first lens body 112 of the optical lens 1 includes an inner surface 1121 facing the dielectric layer 113, and the second lens body 114 includes an inner surface 1141 facing the dielectric layer 113. At least one of the first surface 1131, the second surface 1132 of the dielectric layer 113, the inner surface 1121 of the first lens body 112, and the inner surface 1141 of the second lens body 114 is provided with a light-blocking region 117. The light-blocking region 117 is located between the incident surface 11a and the exit surface 11d. The light-blocking region 117 is located on the stray light propagation path of the optical lens 1, thus avoiding the propagation path of effective light. The light-blocking region 117 may be a frosted structure, a blackened structure, a microstructure, or have a light-blocking layer.

[0327] In this embodiment, the optical lens 1 has a light-blocking region 117 provided on at least one of the first surface 1131 of the dielectric layer 113, the second surface 1132 of the dielectric layer 113, the inner surface 1121 of the first mirror body 112, and the inner surface 1141 of the second mirror body 114. The light-blocking region 117 blocks the propagation of stray light, thereby eliminating stray light and improving the imaging quality of the optical lens 1.

[0328] The method of setting a light-blocking region 117 on at least one of the first surface 1131 of the dielectric layer 113, the second surface 1132 of the dielectric layer 113, the inner surface 1121 of the first mirror body 112, and the inner surface 1141 of the second mirror body 114 has lower processing difficulty, is easier to implement, and has higher precision. For example, compared with the scheme of setting a light-absorbing surface 111 on the first transition surface 11e and / or the second transition surface 11f, the above-mentioned surfaces are flatter and easier to process. For example, when using laser technology to realize the atomization structure, the laser energy can be concentrated in the pre-processed area, resulting in high processing efficiency and high precision.

[0329] The atomization / blackening structure of the light-blocking region 117 can be designed with reference to the previously described scheme where the light-absorbing surface 111 is atomized / blackened, and will not be elaborated here. Similarly, the microstructure of the light-blocking region 117 can be designed with reference to the previously described scheme where the light-absorbing surface 111 is a microstructured surface, and will not be elaborated here. The material of the light-blocking layer can be ink, printing ink, light-absorbing film, reflective film, etc. Other designs for the light-blocking layer can be designed with reference to the previously described scheme for the light-absorbing layer 119, and will not be elaborated here.

[0330] In some embodiments, the first mirror body 112 and / or the second mirror body 114 may also be provided with light-absorbing structures (e.g., light-absorbing surface 111, light-absorbing layer 119, etc.) disposed on the surface of the optical lens 1 as described in the foregoing embodiments and / or light-absorbing structures (e.g., light-blocking structure 116) disposed inside the optical lens 1. For example, Figure 18 The illustration is based on the example of a first mirror body 112 having a light-blocking structure 116 and a second mirror body 114 also having a light-blocking structure 116.

[0331] Please see Figure 19 , Figure 19 yes Figure 2 A partial structural schematic diagram of the optical lens 1 in some other embodiments. Figure 19 The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the parts that are the same will not be repeated. Among them, Figure 19 The dashed lines and dashed lines with arrows illustrate part of the propagation path of light in optical lens 1.

[0332] In some embodiments, the optical lens 1 may include a light blocking element 118, which is inserted into the dielectric layer 113 and located between the incident surface 11a and the exit surface 11d. The light blocking element 118 is positioned on the stray light propagation path of the optical lens 1, avoiding the propagation path of the effective light. The light blocking element 118 may be arranged around the optical axis 1o (not shown in the figure) of the optical lens 1. The light blocking element 118 may be a thin sheet, plate, or three-dimensional structure capable of absorbing or reflecting light. In this embodiment, the light blocking element 118 can disperse and absorb light, preventing it from propagating further forward, thereby eliminating stray light from the optical lens 1 and improving image quality.

[0333] For example, the cross-sectional shape of the light-blocking element 118 can be a straight line, a cross, a triangle, a T, a V, a spiral, a comb, etc., and the embodiments of this application do not strictly limit this. For example, in Figure 19 In the optical lens 1 shown, the cross-sectional shape of the light blocking member 118 is cross-shaped. The light blocking member 118 may include a transverse thin sheet (parallel to the plane of the medium layer 113) and a longitudinal thin sheet (perpendicular to the plane of the medium layer 113) inserted in the dielectric layer 113. A part of the structure of the longitudinal thin sheet may also be inserted into the first lens body 112 and the second lens body 114.

[0334] Please see Figure 20A , Figure 20A yes Figure 2 A schematic diagram of the structure of the optical lens 1 in some other embodiments. Figure 20A The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the parts that are the same will not be repeated.

[0335] In some embodiments, the light-absorbing surface 111 may be provided with a plurality of protrusions 1117, which are arranged at intervals along the circumference of the light-absorbing surface 111. Figure 20A The light-absorbing surface 111 provided on the first transition surface 11e is illustrated as an example. The boss 1117 can be a structure formed by a partial protrusion of the light-absorbing surface 111.

[0336] In this embodiment, the boss 1117 can serve as a process reference for further processing of the lens body 11 after molding (e.g., subsequent atomization treatment, formation of a light-absorbing layer 119 on the light-absorbing surface 111, etc.), and can also be used as a feature identification tool for subsequent processing. The shape of the boss 1117 can be designed to be relatively regular, for example, cylindrical. Other structures of the lens body 11 are mostly curved or irregular in shape, making them difficult to use as process references and requiring higher positioning accuracy. Therefore, using the boss 1117 as a process reference reduces positioning difficulty and improves positioning efficiency, thereby increasing the efficiency of further processing.

[0337] For example, the light-absorbing layer 119 disposed on the light-absorbing surface 111 can cover the protrusion 1117. Wherein, Figure 20A The light-absorbing layer 119 is illustrated by a filled pattern. The boss 1117 can serve as a positioning base for processing the light-absorbing layer 119, which helps to improve the processing accuracy of the light-absorbing layer 119.

[0338] The boss 1117 can be smoothly connected to its surrounding surface area. Alternatively, the boss 1117 can form a discontinuous connection with its surrounding surface area. In this case, the discontinuity height can be considered as the height of the boss 1117. The height of the boss 1117 can be in the range of 5 μm to 100 μm. For example, the value of height h2 can be, but is not limited to, 5 μm, 10 μm, 20 μm, 30 μm, 55 μm, 87 μm, 95 μm, 100 μm, or other values ​​between 5 μm and 100 μm.

[0339] In this embodiment, the height of the boss 1117 satisfies the above design. On the one hand, the height of the boss 1117 is not too low, which facilitates the provision of process reference for the processing of the lens body 11. On the other hand, the height of the boss 1117 is not too high, which avoids affecting the appearance of the optical lens 1 and its subsequent installation in the camera module 10.

[0340] For example, the light-absorbing surface 111 may also be provided with a protruding ring 1118, which connects multiple protrusions 1117, with the protrusions 1117 protruding relative to the protruding ring 1118. The protruding ring 1118 may be a structure formed by a partial area of ​​the light-absorbing surface 111 protruding.

[0341] In this embodiment, the boss 1117 and the convex ring 1118 can serve as process references for further processing of the lens body 11 after molding (e.g., subsequent atomization treatment, formation of a light-absorbing layer 119 on the light-absorbing surface 111, etc.), and can also be used as feature identification for subsequent processing. The shapes of the boss 1117 and the convex ring 1118 can be designed to be relatively regular, while other structures of the lens body 11 are mostly curved or irregular in shape, making them difficult to use as process references and requiring higher positioning accuracy. Therefore, using the boss 1117 and the convex ring 1118 as process references can reduce positioning difficulty and improve positioning efficiency, thereby improving the efficiency of further processing.

[0342] For example, the shape of the convex ring 1118 can be a circular ring, a petal ring, or a serrated ring, etc.

[0343] In this embodiment, when the convex ring 1118 is circular, its structure is relatively regular, which is beneficial for using it as a process reference for further processing of the lens body 11. When the convex ring 1118 is petal-shaped or serrated, it can serve as an anti-stray light structure. When light propagating inside the lens body 11 is incident on the light-absorbing surface 111, the convex ring 1118 can use its structure to increase the number of light reflections or change the direction of light reflection, thereby reducing the risk that the light reflected at the light-absorbing surface 111 will eventually propagate to the exit surface 11d, which is beneficial for improving the imaging quality of the optical lens 1 and the camera module 10.

[0344] For example, the light-absorbing layer 119 disposed on the light-absorbing surface 111 can simultaneously cover the convex ring 1118 and the boss 1117 to enhance the anti-stray light effect of the light-absorbing structure.

[0345] Please see Figure 20B , Figure 20B yes Figure 20A The diagram shows the structure of the optical lens 1 at another angle.

[0346] In some embodiments, the light-absorbing surface 111 may have a raised ring 1118 instead of a raised boss 1117, and the raised ring 1118 is continuously arranged along the circumference of the light-absorbing surface 111. Figure 20B The diagram illustrates the light-absorbing surface 111 on the second transition surface 11f as an example. The convex ring 1118 can be a structure formed by protruding part or all of the light-absorbing surface 111. The light-absorbing layer 119 disposed on the light-absorbing surface 111 can cover the convex ring 1118.

[0347] In this embodiment, the convex ring 1118 can serve as a process reference for further processing of the lens body 11 after molding (e.g., subsequent atomization treatment, formation of a light-absorbing layer 119 on the light-absorbing surface 111, etc.), and can also be used as a feature identification tool for subsequent processing. The shape of the convex ring 1118 can be designed to be relatively regular, while other structures of the lens body 11 are mostly curved or irregular in shape, making them difficult to use as a process reference and requiring higher positioning accuracy. Therefore, using the convex ring 1118 as a process reference reduces positioning difficulty and improves positioning efficiency, thereby increasing the efficiency of further processing.

[0348] For example, the shape of the convex ring 1118 can be a circular ring, a petal ring, or a serrated ring, etc.

[0349] In this embodiment, when the convex ring 1118 is circular, its structure is relatively regular, which is beneficial for using it as a process reference for further processing of the lens body 11. When the convex ring 1118 is petal-shaped or serrated, it can serve as an anti-stray light structure. When light propagating inside the lens body 11 is incident on the light-absorbing surface 111, the convex ring 1118 can use its structure to increase the number of light reflections or change the direction of light reflection, thereby reducing the risk that the light reflected at the light-absorbing surface 111 will eventually propagate to the exit surface 11d, which is beneficial for improving the imaging quality of the optical lens 1 and the camera module 10.

[0350] exist Figure 20A and Figure 20B The diagram illustrates a configuration where the light-absorbing surface 111 has a boss 1117 and a raised ring 1118, and also a configuration where the light-absorbing surface 111 has only the raised ring 1118. In other embodiments, the light-absorbing surface 111 may only have the boss 1117 and not the raised ring 1118. It is understood that the positions of the boss 1117 and / or the raised ring 1118 can be adapted to the configuration of the light-absorbing surface 111 and are not limited to... Figure 20A and Figure 20B The illustrated embodiment, for example, Figure 20A The boss 1117 on the first transition surface 11e can also be provided at... Figure 20B The second transition surface 11f in the middle.

[0351] In this embodiment, since the light-absorbing surface 111 is disposed on the first transition surface 11e and / or the second transition surface 11f, when a boss 1117 or a convex ring 1118 is provided on the light-absorbing surface 111, a corresponding slot structure will be provided on the mold used for molding the lens body 11. This slot structure can also be reused as an exhaust hole, so that during the process of molding the preform to form the lens body 11, the air between the mold and the surface of the preform can be discharged through the slot structure under compression, preventing trapped air from forming between the mold and the surface of the preform and interfering with the formation of the surface shape of the lens body 11. This is beneficial to the fullness and accuracy of the effective optical surface of the lens body 11, thereby improving the product yield.

[0352] For example, the mold may include an upper mold and a lower mold, which are mated to extrude a preform to form the lens body 11. Figure 20A and Figure 20B Taking the optical lens 1 shown as an example, the molding surface of the upper mold corresponds to the shape of the incident surface 11a, the first transition surface 11e, and the second reflecting surface 11c of the lens body 11. The upper mold also has multiple vent holes penetrating the molding surface, which correspond to multiple bosses 1117 on the first transition surface 11e. The molding surface of the lower mold corresponds to the shape of the first reflecting surface 11b, the second transition surface 11f, and the exit surface 11d of the lens body 11. The lower mold also has annular vent holes penetrating the molding surface, which correspond to convex rings 1118 on the second transition surface 11f. During the molding process, the vent holes of the upper and lower molds can be used to form the bosses 1117 and convex rings 1118, and can also expel air between the mold and the surface of the preform, thereby improving the molding accuracy of the lens body 11.

[0353] It is understood that in some other embodiments, the light-absorbing surface 111 may not have the boss 1117 or the convex ring 1118. The mold may also not have vent holes. The mold can perform multiple molding processes on the preform to form the lens body 11, thereby improving the fullness of each surface of the lens body 11. Specifically, the first molding of the preform can give the preform a preliminary surface shape. After the first molding is completed, opening the mold can release the gas between the mold and the preform, thereby achieving venting. This allows the preform to avoid air entrapment affecting the fullness of the surface shape when it is further molded after the first molding, so as to obtain a lens body 11 with a full surface shape.

[0354] It should be noted that in this application, the number of preform molding cycles is not limited, as long as the molded lens body 11 meets the design requirements. Molds with different precision designs can be used for molding; for example, a lower precision mold can be used for the first molding, while a higher precision mold can be used for subsequent moldings. Understandably, the same set of molds can also be used to mold the preform multiple times; specific limitations are not specified here.

[0355] Please refer to the following: Figure 21A and Figure 21B , Figure 21A This is a schematic diagram of the structure of the lens body 11 molded in some embodiments of this application. Figure 21B yes Figure 21A The lens body 11 shown is further processed into an optical lens 1 in some embodiments. It should be noted that... Figure 21B The lens body 11 shown may include some of the structural features of the lens body 11 in any of the foregoing embodiments, and the same structural features will not be described again here.

[0356] In some embodiments, the peripheral surface 11k of the lens body 11 can be formed by cutting. In this embodiment, when providing the preform for forming the lens body 11, the preform can be over-designed. When the preform is molded, the periphery of the preform will overflow, thereby making each surface full, thus forming a shape like... Figure 21A The excessive lens body 11 shown at the edge is based on Figure 21A The lens body 11 shown, along Figure 21A The dotted line indicates that the lens body 11 is processed to form... Figure 21B The lens body 11 is shown. Therefore, without the need for precise control of the amount of the preform or excessive structural limitations, the surface shapes of the incident surface 11a, the first reflecting surface 11b, the second reflecting surface 11c, and the exit surface 11d can be made full, reducing the design and processing difficulty and improving production efficiency.

[0357] It should be noted that, Figure 21A The position and shape of the dashed line shown are for illustrative purposes only. In other embodiments, it may be located in other positions or have other shapes.

[0358] It should be noted that the processing method for the lens body 11 can be cutting (such as laser cutting, wire cutting, tool cutting) or grinding.

[0359] For example, at least a portion of the peripheral side surface 11k has a frosted structure, a blackened structure, or a light-absorbing layer. In this case, the aforementioned area of ​​the peripheral side surface 11k can absorb stray light, thereby reducing stray light from the optical lens 1 and improving the imaging effect of the optical lens 1 and the camera module 10.

[0360] In the process of cutting or grinding to form the peripheral surface 11k of the lens body 11, a frosted surface can be directly formed. During this process, the light-absorbing surface 111 or the structures on the light-absorbing surface 111 (e.g., Figure 20A The boss 1117 and the ring 1118 in the figure can be used as positioning references to improve molding accuracy.

[0361] The design of the atomizing structure, blackening structure and light-absorbing layer on the peripheral side 11k can be referred to the relevant descriptions of the atomizing surface / structure, blackening surface / structure and light-absorbing layer 119 in the previous embodiment, and will not be repeated here.

[0362] In some embodiments of this application, the lens body 11 can also be cut to reduce the radial dimension of the optical lens 1 in one or more directions. When the optical lens 1 is installed in the camera module 10, the overall size of the camera module 10 can be reduced, which is beneficial to the miniaturization design of the camera module 10.

[0363] Please see Figure 22 , Figure 22 yes Figure 2 A schematic diagram of the structure of the optical lens 1 in some other embodiments. Figure 22 The optical lens 1 shown may include most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the parts that are the same will not be repeated.

[0364] In some embodiments, the optical lens 1 may further include multiple film layers fixed to the outer surface of the lens body 11. For example, the optical lens 1 may further include a first high-reflectivity film 12 and a second high-reflectivity film 13, the first high-reflectivity film 12 covering the first reflective surface 11b and the second high-reflectivity film 13 covering the second reflective surface 11c. The high-reflectivity film (HR film) is used to increase reflectivity.

[0365] In this embodiment, the optical lens 1 improves image quality by covering the first reflective surface 11b and the second reflective surface 11c with a high-reflectivity film, thereby reducing the transmittance and increasing the reflectance of the first reflective surface 11b and the second reflective surface 11c. For example, the transmittance of the first reflective surface 11b and the second reflective surface 11c can be less than or equal to 1%, and the reflectance can be greater than or equal to 70%.

[0366] For example, the thickness of the first high-reflectivity film 12 and the second high-reflectivity film 13 can be in the range of 150nm to 500nm, such as 200nm, 250nm, 280nm, 330nm, 400nm, 470nm, etc., in order to balance the anti-reflective effect and thinness.

[0367] For example, the first high-reflectivity film 12 and the second high-reflectivity film 13 can be metal reflective films, all-dielectric reflective films, or metal-dielectric reflective films. Among them, the first high-reflectivity film 12 and the second high-reflectivity film 13 can be metal-dielectric reflective films, that is, a stacked structure of metal layer and dielectric layer.

[0368] In some examples, the metal dielectric reflective film can be a stacked structure of alternating aluminum oxide (Al2O3) layers and aluminum (Al) layers. For example, the metal dielectric reflective film may include a first dielectric layer, a metal layer, and a second dielectric layer. The first dielectric layer may be made of aluminum oxide and its thickness may be in the range of 10 nm to 50 nm, such as 20 nm, 30 nm, 40 nm, etc.; the metal layer may be made of aluminum and its thickness may be in the range of 50 nm to 200 nm, such as 120 nm, 130 nm, 140 nm, etc.; the third dielectric layer may be made of aluminum oxide and its thickness may be in the range of 10 nm to 100 nm, such as 20 nm, 30 nm, 40 nm, etc.

[0369] In other examples, the metal dielectric reflective film can be a stacked structure of alternating aluminum oxide (Al2O3) layers and silver (Ag) layers. For example, the metal dielectric reflective film may include a first dielectric layer, a metal layer, and a second dielectric layer. The first dielectric layer may be made of aluminum oxide and its thickness may be in the range of 10 nm to 50 nm, such as 25 nm, 35 nm, 40 nm, etc.; the metal layer may be made of silver and its thickness may be in the range of 50 nm to 200 nm, such as 120 nm, 130 nm, 140 nm, etc.; the third dielectric layer may be made of aluminum oxide and its thickness may be in the range of 10 nm to 100 nm, such as 25 nm, 35 nm, 40 nm, etc.

[0370] In other examples, the metal dielectric reflective film can be a stacked structure of silicon oxide (SiO2) layer, titanium oxide (TiO2) layer, and aluminum (Al) layer. For example, the metal dielectric reflective film may include sequentially stacked layers of silicon oxide (thickness from 50 nm to 150 nm, such as 80 nm, 100 nm, etc.), titanium oxide (thickness from 30 nm to 100 nm, such as 45 nm, 55 nm, 65 nm, etc.), silicon oxide (thickness from 50 nm to 150 nm, such as 80 nm, 100 nm, etc.), aluminum (thickness from 50 nm to 150 nm, such as 80 nm, 100 nm, 120 nm, etc.), and silicon oxide (thickness from 15 nm to 50 nm, such as 25 nm, 30 nm, 35 nm, etc.).

[0371] The overall thickness of the metal dielectric reflective film can range from 150 nm to 500 nm. The number of layers in the metal dielectric reflective film can also be increased, the material can be changed, and the thickness can be varied. This application does not strictly limit the specific structure and dimensions of the metal dielectric reflective film.

[0372] In some embodiments, the optical lens 1 may further include a first isolation film 14, which covers a second high-reflectivity film 13. The optical lens 1 also includes a first antireflection film 15 and a second antireflection film 16, whereby the first antireflection film 15 covers the incident surface 11a and the first isolation film 14, and the second antireflection film 16 covers the exit surface 11d. The antireflection film, also known as an antireflection coating or simply an RC film, is used to reduce reflectivity.

[0373] In this embodiment, the optical lens 1 uses antireflective coatings to cover the incident surface 11a and the exit surface 11d to reduce the reflectivity of these surfaces and increase the transmittance, thereby improving image quality. For example, the transmittance of the incident surface 11a and the exit surface 11d can be greater than or equal to 80%. During the fabrication of the first antireflective coating 15, the first isolation film 14 covers the second high-reflectivity film 13, protecting it from damage and ensuring high reliability for both the second high-reflectivity film 13 and the first antireflective coating 15. Furthermore, the first isolation film 14 can also absorb stress, reducing problems such as film cracking and peeling caused by increased film thickness, further improving the reliability of both the second high-reflectivity film 13 and the first antireflective coating 15, resulting in high reliability of the optical lens 1. Furthermore, since the first antireflective film 15 can simultaneously cover the first high-reflectivity film 12 and the first isolation film 14, there is no need to additionally fabricate a fixture to block the second reflective surface 11c when preparing the first antireflective film 15, thereby simplifying the fixture structure and reducing the difficulty of preparation.

[0374] For example, the thickness of the first antireflective film 15 and the second antireflective film 16 can be in the range of 150nm to 450nm, such as 200nm, 250nm, 280nm, 330nm, 400nm, etc., in order to balance the antireflective effect and thinness.

[0375] For example, the first antireflective film 15 and the second antireflective film 16 can adopt a stacked structure with alternating high-refractive-index layers and low-refractive-index layers to achieve and adjust the antireflective effect. In some examples, the first antireflective film 15 and the second antireflective film 16 can be a stacked structure with alternating titanium pentoxide (Ti3O5) layers and silicon oxide (SiO2) layers. As shown in Table 1 below, the first antireflective film 15 and the second antireflective film 16 can include an 8-layer structure, and the materials and thicknesses of each layer are as follows.

[0376] Table 1

[0377]

[0378]

[0379] In other examples, the number of layers of the first antireflective film 15 and the second antireflective film 16 may be more or less, the materials may be changed, and the thickness may be changed. The embodiments of this application do not strictly limit the specific structure and size of the first antireflective film 15 and the second antireflective film 16.

[0380] For example, the first isolation film 14 can be made of oil mist, black glue, or other materials. The first isolation film 14 can be attached to the second high reflectivity film 13, protecting the second high reflectivity film 13 and being covered by the first antireflection film 15. Here, the isolation film can also be called an isolation layer, isolation adhesive, etc.

[0381] In some embodiments, the optical lens 1 further includes a second isolation film 17, which covers the first high-reflectivity film 12, and the second antireflective film 16 also covers the second isolation film 17. In this case, the second isolation film 17 covers the first high-reflectivity film 12, preventing damage to the first high-reflectivity film 12 during the fabrication of the second antireflective film 16, thus ensuring high reliability for both the first high-reflectivity film 12 and the second antireflective film 16. Furthermore, the second isolation film 17 can also absorb stress, reducing problems such as film cracking and peeling caused by increased film thickness, further improving the reliability of the first high-reflectivity film 12 and the second antireflective film 16, resulting in high reliability for the optical lens 1. Moreover, since the second antireflective film 16 can simultaneously cover the exit surface 11d and the second isolation film 17, there is no need to fabricate an additional fixture to block the first reflective surface 11b during the fabrication of the second antireflective film 16, thereby simplifying the fixture structure and reducing the fabrication difficulty.

[0382] For example, the second isolation film 17 can be made of oil mist, black glue, or other materials. The second isolation film 17 can be attached to the first high reflectivity film 12, protecting the first high reflectivity film 12 and being covered by the second antireflection film 16. Here, the isolation film can also be called an isolation layer, isolation adhesive, etc.

[0383] In some examples, the periphery of the second high-reflectivity film 13 may extend to the first transition surface 11e to ensure complete coverage of the second reflective surface 11c. The portion of the second high-reflectivity film 13 on the first transition surface 11e may be offset from or overlap with the light-absorbing surface 111 / light-absorbing layer 119 on the first transition surface 11e; this is not strictly limited in the embodiments of this application. The first isolation film 14 may completely cover the second high-reflectivity film 13, and the first isolation film 14 may be offset from or overlap with the light-absorbing surface 111 / light-absorbing layer 119 on the first transition surface 11e; alternatively, the first isolation film 14 may not completely cover the second high-reflectivity film 13, but may cover the portion of the second high-reflectivity film 13 corresponding to the second reflective surface 11c.

[0384] In some examples, the inner edge of the first high-reflectivity film 12 may extend to the second transition surface 11f to ensure complete coverage of the first reflective surface 11b. The portion of the first high-reflectivity film 12 on the second transition surface 11f may be offset from or overlap with the light-absorbing surface 111 / light-absorbing layer 119 on the second transition surface 11f; this is not strictly limited in the embodiments of this application. The second isolation film 17 may completely cover the first high-reflectivity film 12, and the second isolation film 17 may be offset from or overlap with the light-absorbing surface 111 / light-absorbing layer 119 on the second transition surface 11f; alternatively, the second isolation film 17 may not completely cover the first high-reflectivity film 12, but may cover the portion of the first high-reflectivity film 12 corresponding to the first reflective surface 11b.

[0385] In some other embodiments, the optical lens 1 may not include the second isolation film 17, and the second antireflective film 16 may cover the exiting surface 11d but not the first reflecting surface 11b.

[0386] Please refer to the following: Figure 23 and Figure 24 , Figure 23 yes Figure 22 The diagram shown is a schematic diagram of the coating steps in the fabrication process of the optical lens 1. Figure 24 It was through Figure 23 A schematic diagram of the structure formed by the steps shown.

[0387] In some embodiments, when depositing a high-reflectivity film on the lens body 11, the lens body 11 can be fixed using a first fixture 21, which blocks the incident surface 11a and the exit surface 11d. Then, the remaining areas on both sides of the lens body 11 are coated to form a first high-reflectivity film 12 covering the first reflective surface 11b and a second high-reflectivity film 13 covering the second reflective surface 11c.

[0388] The first fixture 21 may include a first part 211 and a second part 212. The first part 211 may be a support structure, blocking the incident surface 11a. One end of the first part 211 may abut against the first transition surface 11e of the lens body 11, and the other end may abut against the second support surface 11h of the lens body 11. The first part 211 may also block the peripheral side surface 11k of the lens body 11. The second part 212 may be a film structure, such as a high-temperature resistant film. The periphery of the second part 212 may abut against the second transition surface 11f, and the second part 212 covers the exit surface 11d. The first reflective surface 11b of the lens body 11 is exposed from one side of the first fixture 21, and the second reflective surface 11c is exposed from the other side of the first fixture 21. During coating, the lens body 11 is coated from both sides of the first fixture 21. After coating, the first fixture 21 can be removed.

[0389] In the coating process of the first high-reflectivity film 12 and the second high-reflectivity film 13, ion source cleaning (approximately 60 seconds) can be performed at room temperature, followed by coating. The coating materials, structure, and thickness can be referred to the previous description and will not be repeated here.

[0390] Please see Figure 25 , Figure 25 yes Figure 22 The diagram shows the coating steps in the fabrication process of the optical lens 1. Figure 2 .

[0391] In some embodiments, the second part 212 of the first fixture 21 may also adopt a bracket structure. In this case, the second part 212 may include a shielding part 2121 and a connecting part 2122; the periphery of the shielding part 2121 abuts against the second transition surface 11f, and the shielding part 2121 covers the emission surface 11d; one end of the connecting part 2122 is connected to the shielding part 2121, and the other end of the connecting part 2122 is connected to the first part 211, with the connecting part 2122 exposed above the first reflective surface 11b. In this embodiment, under the shielding of the second part 212 of the first fixture 21, the coating material does not adhere to the emission surface 11d but adheres to the first reflective surface 11b, forming a first high-reflectivity film 12 (e.g., ...) on the first reflective surface 11b. Figure 24 (As shown).

[0392] Please see Figure 26 , Figure 26 yes Figure 22 The diagram shows the intermediate structure of the optical lens 1 during the fabrication process.

[0393] In some embodiments, after forming a first high-reflectivity film 12 and a second high-reflectivity film 13 on the lens body 11, a first isolation film 14 covering the second high-reflectivity film 13 and a second isolation film 17 covering the first high-reflectivity film 12 can be prepared.

[0394] Please refer to the following: Figure 22 and Figure 27 , Figure 27 yes Figure 22 The diagram shows the coating steps in the fabrication process of the optical lens 1. Figure 3 .

[0395] In some embodiments, when depositing an antireflective coating on the lens body 11, the lens body 11 can be fixed using a second fixture 22, and then the two sides of the lens body 11 can be coated to form a first antireflective coating 15 covering the incident surface 11a and the first isolation film 14, and a second antireflective coating 16 covering the exit surface 11d and the second isolation film 17.

[0396] The second fixture 22 is arranged around the lens body 11. One end of the second fixture 22 abuts against the first support surface 11g of the lens body 11, and the other end abuts against the second support surface 11h of the lens body 11. At this time, the second fixture 22 blocks the peripheral side surface 11k of the lens body 11. The incident surface 11a and the first isolation film 14 of the lens body 11 are exposed from one side of the second fixture 22, while the exit surface 11d and the second isolation film 17 are exposed from the other side of the second fixture 22. During coating, the lens body 11 is coated from both sides of the second fixture 22.

[0397] During the coating process of the first antireflection film 15 and the second antireflection film 16, ion source cleaning (approximately 60 seconds) can be performed in an environment of 90°C, followed by coating. The coating materials, structure, and thickness can be referred to the previous description and will not be repeated here.

[0398] Please see Figure 28 , Figure 28 yes Figure 2 A schematic diagram of the structure of the optical lens 1 in some other embodiments.

[0399] Figure 28 The optical lens 1 shown may include Figure 22 Most of the technical features of the optical lens 1 shown are as follows: Figure 28 The difference in the optical lens 1 shown is that the optical lens 1 does not have a second isolation film 17, and the second anti-reflection film 16 covers the exit surface 11d but does not cover the first reflective surface 11b.

[0400] In some examples, the periphery of the second antireflection film 16 may extend to the second transition surface 11f to ensure complete coverage of the exit surface 11d. The light-absorbing surface 111 / light-absorbing layer 119 of the second antireflection film 16 and the second transition surface 11f may be offset or overlapped. This application embodiment does not strictly limit this.

[0401] Please see Figure 29 , Figure 29 yes Figure 28 The diagram shows the intermediate structure of the optical lens 1 during the fabrication process.

[0402] In some embodiments, after forming a first high-reflectivity film 12 and a second high-reflectivity film 13 on the lens body 11, a first isolation film 14 covering the second high-reflectivity film 13 can be prepared.

[0403] Please see Figure 28 and Figure 30 , Figure 30 yes Figure 28 The diagram shows the coating steps in the fabrication process of the optical lens 1.

[0404] In some embodiments, when depositing an antireflective coating on the lens body 11, the lens body 11 can be fixed using a third fixture 23, and then the two sides of the lens body 11 can be coated to form a first antireflective coating 15 covering the incident surface 11a and the first isolation film 14, and a second antireflective coating 16 covering the exit surface 11d.

[0405] The third fixture 23 is arranged around the lens body 11. One end of the third fixture 23 abuts against the first bearing surface 11g of the lens body 11, and the other end abuts against the second transition surface 11f of the lens body 11. At this time, the third fixture 23 blocks the peripheral side surface 11k and the first high-reflectivity film 12 of the lens body 11. The incident surface 11a and the first isolation film 14 of the lens body 11 are exposed from one side of the third fixture 23, and the exit surface 11d is exposed from the other side of the third fixture 23. During coating, the lens body 11 is coated from both sides of the third fixture 23.

[0406] Figure 28 For other technical features (including structure and manufacturing method) of the optical lens 1 shown, please refer to [reference needed]. Figure 22 The details of the optical lens 1 shown are not repeated here.

[0407] Please refer to the following: Figures 31 to 33 , Figure 31 yes Figure 2 The diagram shows the internal structure of the optical lens 1 in some embodiments. Figure 32A yes Figure 31 The top view of optical lens 1 shown. Figure 32B yes Figure 31 The bottom view of optical lens 1 shown. Figure 33 yes Figure 31The diagram shows the optical path structure of the optical lens 1. It is understood that the optical lens 1 in this embodiment and subsequent embodiments mainly describes the structure of its main body. The optical lens 1 may also include multiple film layers fixed to the outer surface of the lens body, such as a high-reflection film, an anti-reflection film, and a blocking film. The specific design of the multiple film layers of the optical lens 1 can be found in the relevant descriptions of the preceding embodiments (e.g., ...). Figures 22 to 30 (The relevant content will not be repeated hereafter.)

[0408] In some embodiments, the lens body of the optical lens 1 may include an incident surface 11a, a first reflecting surface 11b, a second reflecting surface 11c, an exiting surface 11d, a first transition surface 11e, and a second transition surface 11f. The incident surface 11a, the second reflecting surface 11c, and the first transition surface 11e are located on one side surface of the optical lens 1, with the incident surface 11a surrounding the second reflecting surface 11c, and the first transition surface 11e connecting the incident surface 11a and the second reflecting surface 11c. Alternatively, the first transition surface 11e surrounds the second reflecting surface 11c, and the incident surface 11a surrounds the first transition surface 11e. The first reflecting surface 11b, the exiting surface 11d, and the second transition surface 11f are located on the other side surface of the optical lens 1, with the first reflecting surface 11b surrounding the exiting surface 11d, and the second transition surface 11f connecting the first reflecting surface 11b and the exiting surface 11d. At this time, the second transition surface 11f is arranged around the exit surface 11d, and the first reflecting surface 11b is arranged around the second transition surface 11f.

[0409] In this embodiment, light enters through the incident surface 11a, is reflected sequentially by the first reflecting surface 11b and the second reflecting surface 11c, and then exits through the exit surface 11d. Because the structure of the optical lens 1 allows light to be reflected twice internally before exiting, it achieves two optical path folds, thereby increasing the optical path length within the optical lens 1 and consequently increasing the optical path length within the camera module 10. This is beneficial for achieving a longer focal length and miniaturization of the camera module 10.

[0410] The first transition surface 11e serves as a transitional connection between the incident surface 11a and the second reflecting surface 11c, which is beneficial for the surface design of the incident surface 11a and the second reflecting surface 11c. Similarly, the second transition surface 11f serves as a transitional connection between the first reflecting surface 11b and the exiting surface 11d, which is also beneficial for the surface design of the first reflecting surface 11b and the exiting surface 11d.

[0411] For example, the optical lens 1 may further include a third transition surface 11q and a fourth transition surface 11r. The third transition surface 11q is located on the same side surface of the optical lens 1 as the second reflecting surface 11c and is surrounded by the second reflecting surface 11c. The fourth transition surface 11r is located on the same side surface of the optical lens 1 as the exiting surface 11d and is surrounded by the exiting surface 11d.

[0412] The addition of a third transition surface 11q facilitates the surface design of the second reflecting surface 11c, reducing manufacturing difficulty. Similarly, the addition of a fourth transition surface 11r facilitates the surface design of the exiting surface 11d, further reducing manufacturing difficulty.

[0413] For example, the optical lens 1 may further include a first bearing surface 11g, a second bearing surface 11h, and a peripheral surface 11k. The first bearing surface 11g and the incident surface 11a are located on the same side surface of the optical lens 1 and are disposed around the incident surface 11a. The second bearing surface 11h and the first reflecting surface 11b are located on the same side surface of the optical lens 1 and are disposed around the first reflecting surface 11b, and the second bearing surface 11h is opposite to the first bearing surface 11g. The peripheral surface 11k is circumferentially connected between the first bearing surface 11g and the second bearing surface 11h. At this time, the peripheral surface 11k is also circumferentially connected between the two side surfaces of the optical lens 1.

[0414] By setting the first bearing surface 11g and the second bearing surface 11h, it is beneficial to position the optical lens 1 during the manufacturing process, which in turn is beneficial to the fullness of the surface shape of the incident surface 11a and the first reflecting surface 11b formed by molding.

[0415] It is understood that in this embodiment, the incident surface 11a, the first reflecting surface 11b, the second reflecting surface 11c, and the exit surface 11d are the effective optical surfaces of the optical lens 1. The first transition surface 11e, the second transition surface 11f, the third transition surface 11q, the fourth transition surface 11r, the first bearing surface 11g, the second bearing surface 11h, and the peripheral surface 11k are the non-effective optical surfaces of the optical lens 1.

[0416] It should be noted that the aforementioned effective optical surface refers to the surface through which the effective light rays used for imaging pass. If the effective optical surface is blocked, the image or image quality of the optical lens 1 will be affected. Ineffective optical surfaces, on the other hand, refer to surfaces through which the effective light rays used for imaging do not pass. Of course, light may still pass through ineffective optical surfaces, but this light is not the light required for optical imaging or may adversely affect the image quality; therefore, this light can be considered ineffective light. To avoid the adverse effects of ineffective light on imaging, in some embodiments, the ineffective optical surface of the optical lens 1 can be treated with light-absorbing processes (such as blackening, plating, or frosting) to absorb or diffuse ineffective light.

[0417] It is understandable that the non-effective optical surface of optical lens 1 is not necessarily treated with light absorption, but the surface after light absorption treatment is a non-effective optical surface.

[0418] Similarly, the optical lens 1 may include an effective optical region and an ineffective optical region. The effective optical region refers to the area through which effective light rays used for imaging pass. The ineffective optical region refers to the area through which ineffective light rays pass. Ineffective light rays are not the light rays required for optical imaging, or they may adversely affect the image quality. In some embodiments, the ineffective optical region of the optical lens 1 can absorb or scatter ineffective light rays through light absorption treatments (such as blackening, plating, or frosting). It is understood that the ineffective optical region of the optical lens 1 does not necessarily undergo light absorption treatment, but the area after light absorption treatment is considered an ineffective optical region.

[0419] In some embodiments, the optical lens 1 may include an effective optical region 1a, a first ineffective optical region 1b, and a second ineffective optical region 1c. The effective optical region 1a connects the incident surface 11a, the first reflecting surface 11b, the second reflecting surface 11c, and the exiting surface 11d. Light can enter the effective optical region 1a from the incident surface 11a, propagate within the effective optical region 1a, and exit the effective optical region 1a from the exiting surface 11d.

[0420] The first ineffective optical region 1b can extend from the first transition surface 11e towards the first reflecting surface 11b. The first ineffective optical region 1b can be rotationally symmetrical and annular, surrounding the optical axis 1o of the optical lens 1. The width of the first ineffective optical region 1b decreases in the direction from the first transition surface 11e to the first reflecting surface 11b. Here, the width of the first ineffective optical region 1b refers to the dimension of its cross-section in the direction perpendicular to the direction from the first transition surface 11e to the first reflecting surface 11b, and the plane containing the cross-section of the first ineffective optical region 1b coincides with the optical axis 1o of the optical lens 1.

[0421] The second ineffective optical region 1c can extend from the second transition surface 11f towards the direction close to the second reflecting surface 11c. The second ineffective optical region 1c can be rotationally symmetrical and annular, surrounding the optical axis 1o of the optical lens 1. The width of the second ineffective optical region 1c decreases in the direction from the second transition surface 11f to the second reflecting surface 11c. Here, the width of the second ineffective optical region 1c refers to the dimension of its cross-section in the direction perpendicular to the direction from the second transition surface 11f to the second reflecting surface 11c, and the plane containing the cross-section of the second ineffective optical region 1c coincides with the optical axis 1o of the optical lens 1.

[0422] For example, the optical lens 1 may further include a third ineffective optical region 1d, which connects the third transition surface 11q and the fourth transition surface 11r. The third ineffective optical region 1d may be rotationally symmetric and cylindrical. The outer diameter of the third transition surface 11q may be larger than the outer diameter of the fourth transition surface 11r. The cross-sectional shape of the third ineffective optical region 1d may be trapezoidal, and the plane containing the cross-section of the third ineffective optical region 1d coincides with the optical axis 1o of the optical lens 1.

[0423] For example, the optical lens 1 may further include a fourth ineffective optical region 1f, which surrounds the effective optical region 1a. The fourth ineffective optical region 1f may connect the first bearing surface 11g, the second bearing surface 11h, and the peripheral side surface 11k. The first ineffective optical region 1b may be rotationally symmetrical and arranged around the optical axis 1o of the optical lens 1.

[0424] It is understood that in some embodiments, the optical lens 1 may also include a fifth transition surface and / or a sixth transition surface, with the fifth transition surface connecting the incident surface 11a and the first bearing surface 11g, and the sixth transition surface connecting the first reflecting surface 11b and the second bearing surface 11h. In this case, the fifth transition surface and / or the sixth transition surface are also non-effective optical surfaces of the optical lens 1, and the fourth non-effective optical region 1f may also be connected to the fifth transition surface and / or the sixth transition surface.

[0425] In some embodiments, the surface of the optical lens 1 may also include one or more transition fillets (not shown in the figure) to reduce the difficulty of designing and processing the effective optical surface. Alternatively, a volume buffer may be formed near the peripheral side 11k of the optical lens 1 to make the effective optical surface more full, even reaching 100% fullness, during the molding process of the optical lens 1. Furthermore, due to the presence of the volume buffer, it is not necessary to perform high-precision control on the dimensional tolerances of the incoming material of the optical lens 1, thereby reducing the difficulty of controlling the incoming material, and thus improving production efficiency and the yield of the optical lens 1.

[0426] In some scenarios, optical lens 1 may exhibit various types of stray light, such as direct-through stray light, quadruple-reflection stray light, and interplane-reflection stray light. These stray lights typically pass through at least one of the first ineffective optical region 1b, the second ineffective optical region 1c, and the third ineffective optical region 1d. Direct-through stray light can be light that enters from the incident surface 11a and exits directly from the exit surface 11d without being reflected by the first reflecting surface 11b or the second reflecting surface 11c. Quadruple-reflection stray light can be light that enters from the incident surface 11a, is reflected by the first reflecting surface 11b and the second reflecting surface 11c, is reflected back to the first reflecting surface 11b, is reflected again by the second reflecting surface 11c, and finally exits from the exit surface 11d. Interplane-reflection stray light can be light that exits normally from the optical lens 1, is reflected by the surfaces of subsequent lens groups, optical path folding elements, etc., enters the optical lens 1 through the exit surface 11d, is reflected by the second reflecting surface 11c, and then exits from the exit surface 11d. The presence of these stray lights will result in poor image quality from camera module 10.

[0427] like Figure 31 As shown, in some embodiments, the optical lens 1 may include at least one light-blocking barrier 130, which may be disposed within the non-effective optical area of ​​the optical lens. The light-blocking barrier 130 is colored and free of cracks. The light-blocking barrier 130 is used to block light.

[0428] It should be noted that the absence of cracks within the light barrier 130 means that, under visible magnification, such as observation with an electron microscope with a precision of 20 micrometers or 50 micrometers, there are no obvious structural changes such as bubbles, cavities, or cracks within the light barrier 130.

[0429] From another perspective, the absence of cracks within the light barrier 130 ensures that the structural density of the optical lens 1 does not significantly change after the light barrier 130 is fabricated, thus maintaining good mechanical stability. For example, the ratio of the overall structural density of the optical lens 1 to the structural density of its effective optical area is greater than or equal to 97% and less than or equal to 103%. In some embodiments, the ratio of the overall structural density of the optical lens 1 to the structural density of its effective optical area is greater than or equal to 98% and less than or equal to 102%. This structural density can be obtained using standard density testing methods.

[0430] For example, the light barrier 130 is located on the side of the first transition surface 11e facing the first reflecting surface 11b, and / or, the light barrier 130 is located on the side of the second transition surface 11f facing the second reflecting surface 11c. For instance, at least one light barrier 130 includes a first light barrier 1301 located on the side of the first transition surface 11e facing the first reflecting surface 11b, in which case the first light barrier 1301 is located in the first ineffective optical region 1b. At least one light barrier 130 includes a second light barrier 1302 located on the side of the second transition surface 11f facing the second reflecting surface 11c, in which case the second light barrier 1302 is located in the second ineffective optical region 1c.

[0431] In this embodiment, by providing at least one light-blocking wall 130 within the non-effective optical area of ​​the optical lens 1, the light-blocking wall 130 effectively blocks stray light from propagating within the optical lens 1, thereby reducing stray light in the optical lens 1 and improving image quality. The light-blocking wall 130 is colored and crack-free, which not only enhances the light-blocking effect but also avoids causing physical damage to the optical lens 1, thus ensuring the structural reliability and optical performance reliability of the optical lens 1.

[0432] By setting the first light barrier 1301 and / or the second light barrier 1302, a portion of the stray light from the optical lens 1 can be blocked. For example, most of the direct stray light and the fourth reflection stray light will be blocked by the first light barrier 1301 and / or the second light barrier 1302, thereby reducing the stray light from the optical lens 1 and improving the imaging quality.

[0433] For example, at least one light barrier 130 may also include a third light barrier 1303, which is located between the third transition surface 11q and the fourth transition surface 11r. In this case, the third light barrier 1303 can block another portion of stray light from the optical lens 1. For example, most of the inter-plane reflection stray light will be blocked by the third light barrier 1303, thereby reducing stray light from the optical lens 1 and improving the imaging quality.

[0434] In some optical lenses, a light-blocking structure is incorporated. This structure is formed through laser engraving. However, such light-blocking structures are typically formed due to the thermal effect of the laser on the material, making them inherently destructive. This means that physical damage, such as microcracks or bubbles, often exists at the light-blocking structure, leading to cracks around it and poor lens reliability. These 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.

[0435] In this application, the light barrier 130 can be formed using a laser engraving process. The laser can modulate a local area of ​​the optical lens 1 to form a modified region, thereby creating a damage-free light barrier 130. Specifically, the material in the laser-affected area of ​​the optical lens 1 is ionized to form electrons and holes, resulting in lattice distortion near the focal point. This distortion traps electrons / holes, changing the color of the area and forming the light barrier 130. The damage-free light barrier 130 typically also lacks physical damage such as burst points. The structure of the light barrier 130 is physically indistinguishable from other areas of the optical lens 1 (such as the effective optical region 1a), except for color differences. For example, under electron microscopy with a resolution of 20 micrometers or 50 micrometers, no obvious structural differences are usually visible; the difference between the two is generally manifested in the different chemical bonds.

[0436] During the fabrication of the light-blocking wall 130, the surface shape of the optical lens 1 remains unchanged, thus ensuring the fabrication accuracy of the optically effective surface. Furthermore, the light-blocking wall 130 is colored, which also helps to improve the light-blocking effect. In addition, the light-blocking wall 130 in this embodiment is typically fabricated using femtosecond or picosecond lasers. For example, under the action of a femtosecond laser, the glass ionizes to form electrons and holes, and lattice defects are formed near the focal point. After the defects capture electrons / holes, they form color centers. These color centers can selectively absorb light (energy level transitions absorb light of specific wavelengths), thus giving the material a dark / foggy effect. Of course, the fogging / darkening effect within the glass can also be achieved by optimizing parameters such as laser wavelength, energy, and scanning speed. Furthermore, the fabrication accuracy of the light-blocking wall 130 in this embodiment is in the sub-micron to nanometer range, exhibiting high precision.

[0437] For example, the optical lens 1 is made of glass material containing oxide components with a refractive index in the range of 1.49 to 2.1, and the oxide components include at least one of boron oxide, titanium oxide, barium oxide, lanthanide oxide or rubidium oxide.

[0438] In this embodiment, the material selection for the optical lens 1 not only meets its optical path propagation requirements but also facilitates the formation of a colored and crack-free light barrier 130. It is understood that in other embodiments, the oxide composition may also employ other types of oxides not mentioned above, as long as the optical lens 1 meets its optical path propagation requirements and can form the light barrier 130 under laser engraving. This application does not impose strict limitations on this aspect.

[0439] The oxide content can be greater than or equal to 5%. In this case, the light-blocking wall 130 can have a darker color and better light-blocking effect. In some examples, the oxide content can be greater than or equal to 10% to further improve the light-blocking effect of the light-blocking wall 130.

[0440] For example, the light barrier 130 can be black, brown, off-white, or yellow, among other colors. The color of the light barrier 130 is diverse. The color of the light barrier 130 is generally related to the oxide composition of the glass material of the optical lens 1. For example, when the oxide composition is boron oxide, the light barrier 130 is brown; when the oxide composition is titanium oxide, the light barrier 130 is black. Furthermore, the depth of color of the light barrier 130 is related to its thickness; the thicker the barrier, the darker the color. The color of the light barrier 130 is also related to the degree of local modulation; the more times the laser is modulated at the same location, the darker the color at that location becomes.

[0441] For example, the light barrier 130 has a cross-section, and the plane of the cross-section of the light barrier 130 coincides with the optical axis 1o of the optical lens 1. The cross-section of the light barrier 130 can have various shapes. For example, the shape of the cross-section of the light barrier 130 can be a strip, a T-shape, a V-shape, an I-shape, a triangle, a trapezoid, a stepped shape, a columnar shape, a wave shape, a ring shape, a sawtooth shape, a petal shape, a spiral shape, or a rectangle, or it can be a combination of the above shapes, such as a combination of stripes and triangles. Among them, the strip can be a horizontal strip, a vertical strip, or a diagonal strip. The horizontal strip can be perpendicular to the optical axis 1o of the optical lens 1, the vertical strip can be parallel to the optical axis 1o of the optical lens 1, and the diagonal strip can be at an angle to the optical axis 1o of the optical lens 1.

[0442] In this embodiment, the structure of the light-blocking wall 130 is diverse, which can better adapt to the shape of the non-effective optical area where it is located, thereby improving its light-blocking effect. The shape of each light-blocking wall 130 can be designed independently, which provides high design flexibility.

[0443] Among them, such as Figure 31 As shown, the cross-sectional shapes of the first light barrier 1301, the second light barrier 1302, and the third light barrier 1303 are all triangular. In this case, the shape of the light barrier 130 is highly compatible with the shape of the non-effective optical area it is located in, resulting in good light blocking effect and helping to reduce stray light from the optical lens 1.

[0444] Please see Figure 34 , Figure 34 yes Figure 31 A schematic diagram of some deformed structures of the second light barrier 1302 of the optical lens 1 shown.

[0445] exist Figure 34 In the first figure, the second light barrier 1302 is triangular in shape and comprises multiple parts. These multiple parts are stacked and spaced apart, and the outer contour formed by the multiple parts is triangular. Furthermore, while the multiple parts shown in the figure are spaced apart, in other embodiments, the multiple parts may be arranged in an overlapping manner.

[0446] exist Figure 34In the second figure, the second light barrier 1302 is a single-sided stepped shape, and the height of the second light barrier 1302 gradually decreases from one side to the other. The height of each step can be the same or different. In some other embodiments, the second light barrier 1302 can also be a double-sided stepped shape, in which case the height of the second light barrier 1302 gradually decreases from the middle to both sides.

[0447] exist Figure 34 In the third figure, the second light barrier 1302 is T-shaped, including an intersecting horizontal bar and a vertical bar. One end of the vertical bar can be connected to the middle of the horizontal bar, or to a position near the middle of the horizontal bar. In some other embodiments, the second light barrier 1302 can also be L-shaped.

[0448] exist Figure 34 In the fourth figure, the second light barrier 1302 is in the form of a columnar figure, including multiple spaced strip columns, at least two of which have different heights.

[0449] exist Figure 34 In the fifth figure, the second light barrier 1302 is wavy and includes two opposing surfaces, at least one of which is a wavy surface.

[0450] in, Figure 34 The second ineffective optical region 1c is also illustrated in each of the diagrams, and the shape of the second light barrier 1302 can be matched with the second ineffective optical region 1c.

[0451] Understandable, Figure 34 This is only a schematic diagram of a partial implementation of the cross-sectional shape of the second light barrier 1302. The cross-section of the second light barrier 1302 can also be other shapes not mentioned in this application. The shapes of the cross-sections taken from different positions of the same second light barrier 1302 can be the same or different, and this application does not impose specific restrictions on this. The shape of the cross-section of the first light barrier 1301 can be designed with reference to the shape of the cross-section of the second light barrier 1302, and can be the same as, similar to, or different from the shape of the cross-section of the second light barrier 1302.

[0452] Please see Figure 35 , Figure 35 yes Figure 31 A schematic diagram of some deformed structures of the third light barrier 1303 of the optical lens 1 shown.

[0453] exist Figure 35 In the first diagram, the third light barrier 1303 is a double-sided stepped shape, and the height of the third light barrier 1303 gradually decreases from the middle to both sides. The height of each step can be the same or different.

[0454] exist Figure 35In the second diagram, the third light barrier 1303 is a single-sided stepped shape, and the height of the third light barrier 1303 gradually decreases from one side to the other. The heights of each step can be the same or different.

[0455] exist Figure 35 In the third figure, the third light barrier 1303 is a single-sided stepped shape. The difference between the third figure and the second figure is that the direction of the decrease in the height of the steps is different.

[0456] exist Figure 35 In the fourth figure, the third light barrier 1303 is a columnar figure, comprising multiple spaced strip columns, at least two of which have different heights. For example, the middle strip column is higher than the two side strip columns.

[0457] exist Figure 35 In the fifth figure, the third light barrier 1303 is in the shape of a column. The difference between the fifth figure and the fourth figure is that the number of the columns is different and the position of the aligned ends of the columns is different.

[0458] exist Figure 35 In the sixth figure, the third light barrier 1303 is in the shape of an I-beam, consisting of two horizontal bars and one vertical bar, with the two ends of the vertical bar connected to the two horizontal bars respectively.

[0459] exist Figure 35 In the seventh figure, the third light barrier 1303 is wavy and includes two opposing surfaces, at least one of which is a wavy surface.

[0460] in, Figure 35 The diagrams also exemplarily illustrate a third ineffective optical region 1d, the shape of which can match the third ineffective optical region 1d.

[0461] Understandable, Figure 35 This is only a schematic diagram of a partial implementation of the shape of the cross-section of the third light barrier 1303. The cross-section of the third light barrier 1303 can also be any shape. The shapes of the cross-sections taken from different positions of the same third light barrier 1303 can be the same or different, and this application does not impose specific restrictions on this.

[0462] Please refer to it again. Figure 31 , Figure 34 and Figure 35In some embodiments, the light barrier 130 may include multiple barrier layers stacked together, with adjacent barrier layers connected or spaced apart. In this embodiment, during the fabrication of the light barrier 130, barrier layers are first laid out using multiple laser spots, and then the light barrier 130 is formed by stacking the multiple barrier layers. By changing the shape of the barrier layers, or by changing the stacking direction, stacking position, or stacking number of the barrier layers, various shapes of the light barrier 130 can be achieved. For example, in Figure 34 In the first drawing, a portion of the second light barrier 1302 may correspond to one or more barrier layers. Or Figure 35 In the first figure, a step of the third light barrier 1303 can correspond to one or more barrier layers.

[0463] For example, the thickness of the barrier layer is in the range of 100 micrometers to 300 micrometers. At this point, the manufacturing precision of the barrier layer is high, which is beneficial to improving the manufacturing precision of the light barrier 130.

[0464] The thickness of the light-blocking wall 130 is related to the number of blocking layers; the more blocking layers, the thicker the light-blocking wall 130. In some examples, the number of blocking layers can exceed 10. In this case, the light-blocking wall 130 has a certain thickness, resulting in low transmittance, for example, reducing the transmittance to below 0.3%, thus achieving a good light-blocking effect. The number of blocking layers can range from 10 to 20. In this case, the light-blocking wall 130 can balance the requirements of low transmittance and high processing efficiency.

[0465] In some examples, multiple blocking layers can have the same thickness, and the spacing between adjacent blocking layers can be equal, meaning that multiple blocking layers can be arranged at equal intervals. This effectively reduces the risk of grating diffraction and avoids problems such as uneven color and rainbow spots. The light-blocking wall 130 has a good light-blocking effect. The position and thickness of the multiple blocking layers can be adjusted by adjusting the laser scanning path.

[0466] Please see Figure 36 , Figure 36 yes Figure 2 The diagram shows the internal structure of the optical lens 1 in some other embodiments. Figure 36 The optical lens 1 shown includes Figure 31 Most of the technical features of the optical lens 1 shown are different from those of the light barrier 130. The following mainly describes the differences between the two, and the most common technical features of the two will not be repeated.

[0467] In some embodiments, the arrangement direction of the multiple blocking layers of the light barrier 130 can be parallel to the optical axis 1o of the optical lens 1. In this case, the light rays incident on the light barrier 130 formed by the stacking of multiple blocking layers are less prone to dispersion, and the light barrier 130 has a better light blocking effect.

[0468] In other embodiments, the arrangement direction of the multiple blocking layers can also form an angle of less than 45° with the optical axis 1o of the optical lens 1, such as 5°, 10°, 15°, etc. In this case, the light blocking wall 130 can still suppress the dispersion phenomenon and has a good light blocking effect.

[0469] For example, multiple blocking layers of the first light barrier 1301 and / or the second light barrier 1302 are arranged parallel to the optical axis 1o of the optical lens 1. The widths of the cross-sections of the multiple blocking layers are different, and adjacent blocking layers are connected (or spaced apart). Multiple blocking layers of the third light barrier 1303 are arranged parallel to the optical axis 1o of the optical lens 1. The widths of the cross-sections of the blocking layers of the first light barrier 1301, the second light barrier 1302, and / or the third light barrier 1303 also coincide with the optical axis 1o of the optical lens 1.

[0470] For example, the second light barrier 1302 includes multiple stacked and connected blocking layers 13021, each with a different width in its cross-section. The second light barrier 1302 is double-sided stepped, and the arrangement direction of the multiple blocking layers 13021 is parallel to the optical axis 1o of the optical lens 1.

[0471] Please refer to it again. Figure 31 In some embodiments, the width of the first light-blocking wall 1301 is reduced in the direction from the first transition surface 11e to the first reflecting surface 11b. Here, the width of the first light-blocking wall 1301 refers to the dimension of the cross-section of the first light-blocking wall 1301 in the direction perpendicular to the direction from the first transition surface 11e to the first reflecting surface 11b, and the plane containing the cross-section of the first light-blocking wall 1301 coincides with the optical axis 1o of the optical lens 1.

[0472] In this embodiment, the shape of the first light-blocking wall 1301 is highly compatible with the shape of the first non-effective optical area 1b, and the light-blocking effect of the first light-blocking wall 1301 is good. It is understood that the first light-blocking wall 1301 can adopt a variety of shapes to meet its width variation requirements, and the specific shape is not strictly limited in this embodiment.

[0473] For example, the width of the second light barrier 1302 is reduced in the direction from the second transition surface 11f to the second reflecting surface 11c. Here, the width of the second light barrier 1302 refers to the dimension of the cross-section of the second light barrier 1302 in the direction perpendicular to the direction from the second transition surface 11f to the second reflecting surface 11c, and the plane containing the cross-section of the second light barrier 1302 coincides with the optical axis 1o of the optical lens 1.

[0474] In this embodiment, the shape of the second light barrier 1302 is highly compatible with the shape of the second non-effective optical region 1c, and the light-blocking effect of the second light barrier 1302 is good. It is understood that the second light barrier 1302 can adopt a variety of shapes to meet its width variation requirements, and the specific shape is not strictly limited in this embodiment.

[0475] For example, the width of the third light barrier 1303 is reduced in the direction from the third transition surface 11q to the fourth transition surface 11r. Here, the width of the third light barrier 1303 refers to the dimension of the cross-section of the third light barrier 1303 in the direction perpendicular to the direction from the third transition surface 11q to the fourth transition surface 11r, and the plane containing the cross-section of the third light barrier 1303 coincides with the optical axis 1o of the optical lens 1.

[0476] In this embodiment, the shape of the third light barrier 1303 is highly compatible with the shape of the third non-effective optical region 1d, and the light-blocking effect of the third light barrier 1303 is good. It is understood that the third light barrier 1303 can adopt a variety of shapes to meet its width variation requirements, and the specific shape is not strictly limited in this embodiment.

[0477] In some embodiments, the first light-blocking wall 1301 may be arranged around the optical axis 1o of the optical lens 1 to achieve a better light-blocking effect. In some examples, the first light-blocking wall 1301 may be a continuous structure. In this way, the light-blocking effect of the first light-blocking wall 1301 is uniform in the direction surrounding the optical axis 1o of the optical lens 1, which is beneficial to improving image quality. In other examples, the first light-blocking wall 1301 may also include multiple portions arranged at intervals.

[0478] For example, the first light barrier 1301 can be a complete ring structure with rotational symmetry, or it can be other shapes that are not complete and / or not rotationally symmetric. The specific shape of the light barrier 130 is not strictly limited in the embodiments of this application. For example, the first light barrier 1301 can be in the form of a circular ring, a serrated ring, a petal ring, or a spiral.

[0479] In some embodiments, the second light-blocking wall 1302 may be arranged around the optical axis 1o of the optical lens 1 to achieve a better light-blocking effect. In some examples, the second light-blocking wall 1302 may be a continuous structure. In this way, the light-blocking effect of the second light-blocking wall 1302 is uniform in the direction surrounding the optical axis 1o of the optical lens 1, which is beneficial to improving image quality. In other examples, the second light-blocking wall 1302 may also include multiple portions arranged at intervals.

[0480] For example, the second light barrier 1302 can be a complete ring structure with rotational symmetry, or it can be other shapes that are not complete and / or not rotationally symmetric. The specific shape of the light barrier 130 is not strictly limited in this embodiment. For example, the second light barrier 1302 can be in the form of a circular ring, a serrated ring, a petal ring, or a spiral.

[0481] It is understood that in some other embodiments, the optical lens 1 may also be a light barrier formed by other processing methods. For example, a laser can be used to create tiny holes in the optical lens 1, which are then filled with black ink (or other colored liquid) to form a light barrier. This light barrier is not a non-destructive light barrier and has a cracked structure. Other designs of this light barrier can be found in the relevant descriptions of the preceding embodiments, and will not be repeated here.

[0482] In some embodiments, the optical lens 1 may have a light-absorbing structure on a non-effective optical surface to further reduce stray light and improve image quality. For example, at least a portion of the first transition surface 11e, the second transition surface 11f, the third transition surface 11q, the fourth transition surface 11r, the first bearing surface 11g, the second bearing surface 11h, and / or the peripheral surface 11k is a frosted surface, a blackened surface, a microstructured surface, or is covered with a light-absorbing layer. The term "at least a portion" includes both the entire area and a partial area.

[0483] In this embodiment, the optical lens 1 effectively reduces stray light and achieves better imaging results by providing a light-blocking wall 130 inside and a light-absorbing structure on its surface. Specifically, when a light-absorbing structure is provided on the peripheral side 11k, it can effectively eliminate stray light reflected from the outer diameter, thereby improving the imaging quality of the optical lens 1.

[0484] The atomized surface is a rough, matte finish, not a glossy one. The blackened surface is a surface whose structure is black or nearly black through a blackening treatment. The microstructured surface has one or more microstructures. In this embodiment, the above-mentioned surface structures can achieve light absorption by dispersing light. The atomized surface can be formed by a chemical atomization process, a physical atomization process, or an optical atomization process.

[0485] The light-absorbing layer can be made of ink, clay printing, thin film, etc. In other embodiments, the light-absorbing layer can also be made of other materials capable of absorbing light. Exemplarily, the light-absorbing layer can be formed on or assembled onto a non-effective optical surface by processes such as spraying, transfer printing, clay printing, coating, and film deposition. The manufacturing process of the light-absorbing layer is not strictly limited in the embodiments of this application.

[0486] In other examples, the light-absorbing layer can also be formed by blackening the optical film glass. For example, the surface of the optical film glass can be treated to produce different responses to light of specific wavelengths, thereby forming a blackened layer, i.e., a light-absorbing layer.

[0487] For example, the light-absorbing structures on the first transition surface 11e, the second transition surface 11f, the first bearing surface 11g, the second bearing surface 11h and / or the peripheral surface 11k can be rotationally symmetric complete annular structures, or they can be other structures that are not complete and / or not rotationally symmetric.

[0488] For example, the light-absorbing structure on the first transition surface 11e and / or the second transition surface 11f can be annular. The light-absorbing structure has a cross-section, and the plane of the cross-section of the light-absorbing structure coincides with the optical axis of the optical lens 1. The shape of the cross-section of the light-absorbing structure can be straight, arc-shaped, spline-shaped, multi-segment-shaped, sawtooth-shaped, wavy, or other shapes.

[0489] Alternatively, the light-absorbing structure on the first transition surface 11e and / or the second transition surface 11f can be in the form of a petal ring. The inner and outer ring edges of the light-absorbing structure can both be petal rings, or one of them can be petal rings. The petal shape can also be understood as a closed, wavy ring. In this implementation, by setting the light-absorbing structure as a petal ring, the shape of stray light in the optical lens 1 can be harmonized, making the shape of unabsorbed stray light regular, which is beneficial to improving the imaging quality of the optical lens 1.

[0490] Alternatively, the light-absorbing structure on the first transition surface 11e and / or the second transition surface 11f can be a sawtooth ring. The inner and outer ring edges of the light-absorbing structure can both be sawtooth rings, or one of them can be a sawtooth ring. In this implementation, by setting the light-absorbing structure as a sawtooth ring, the shape of stray light in the optical lens 1 can be harmonized, making the shape of unabsorbed stray light regular, which is beneficial to improving the imaging quality of the optical lens 1.

[0491] For example, the circumferential surface 11k can be an annular shape, a petal-shaped shape, or a serrated shape, etc. Wherein, when the circumferential surface 11k is a petal-shaped shape, the circumferential surface extends in a curved wave in its circumferential direction; when the circumferential surface 11k is a serrated shape, the circumferential surface extends in a straight wave in its circumferential direction.

[0492] For example, when the light-absorbing structure uses a frosted surface, the light-absorbing structure is not smooth, with a roughness Sa > 1 μm, transmittance < 6%, and reflectivity < 1%. This allows stray light incident on the light-absorbing structure to be dispersed, reducing interface reflectivity and improving the imaging quality of the optical lens 1. In some examples, the roughness of the light-absorbing structure can be in the range of VDI 8 (corresponding to Ra 0.25 μm) to VDI18 (corresponding to Ra 0.8 μm).

[0493] For example, the width of the light-absorbing structure can be greater than or equal to 0.25 mm. In this case, the width of the non-effective optical surface where the light-absorbing structure is located is also greater than or equal to 0.25 mm. In this embodiment, the above-mentioned width limitation is beneficial to ensuring process implementation and also facilitates the surface machining of the mold, thus ensuring the accuracy of the optical lens 1.

[0494] For example, in Figure 31 In this embodiment, the light-absorbing structure on each non-effective optical surface is illustrated by an example where a light-absorbing layer 140 is applied. Figure 31 The winning bid indicated one of the light-absorbing layers, 140; the remaining light-absorbing layers were not indicated.

[0495] Please see Figure 37 , Figure 37 yes Figure 31 Schematic diagrams of some modified structures of the light-absorbing structure of the second transition surface 11f of the optical lens 1 shown. Among them, Figure 37 The diagram also illustrates one implementation structure of the second light barrier 1302 within the second ineffective optical region 1c.

[0496] exist Figure 37 In the first figure, at least a portion of the second transition surface 11f is a fogged surface.

[0497] exist Figure 37 In the second figure, at least a portion of the second transition surface 11f is a fogged surface, and the fogged surface is covered with a light-absorbing layer 140.

[0498] exist Figure 37 In the third figure, at least a portion of the second transition surface 11f is a microstructure surface, which may include, for example, multiple serrations or other microstructures.

[0499] exist Figure 37 In the fourth figure, at least a portion of the second transition surface 11f is a microstructure surface, and the microstructure surface is covered with a light-absorbing layer 140.

[0500] Understandable, Figure 37This is only a schematic diagram of a partial implementation of the light-absorbing structure of the second transition surface 11f. Other light-absorbing structures can also be used for the second transition surface 11f. The light-absorbing structure of the first transition surface 11e can be designed with reference to the light-absorbing structure of the second transition surface 11f, and can be the same as, similar to, or different from the light-absorbing structure of the second transition surface 11f.

[0501] Please see Figure 38 , Figure 38 yes Figure 31 The diagram shows some modified structures of the light-absorbing structures of the third transition surface 11q and the fourth transition surface 11r of the optical lens 1 shown. Figure 38 The diagram also illustrates one implementation structure of the third light barrier 1303 within the third ineffective optical zone 1d.

[0502] exist Figure 38 In the first figure, at least a portion of the third transition surface 11q and at least a portion of the fourth transition surface 11r are atomized surfaces.

[0503] exist Figure 38 In the second figure, at least a portion of the third transition surface 11q and at least a portion of the fourth transition surface 11r are atomized surfaces, and the atomized surfaces are covered with a light-absorbing layer 140.

[0504] exist Figure 38 In the third figure, at least a portion of the third transition surface 11q and at least a portion of the fourth transition surface 11r are microstructure surfaces, which may include, for example, multiple serrations or other microstructures.

[0505] exist Figure 38 In the fourth figure, at least a portion of the third transition surface 11q and at least a portion of the fourth transition surface 11r are microstructure surfaces, and the microstructure surfaces are covered with a light-absorbing layer 140.

[0506] Understandable, Figure 38 This is only a schematic diagram of a partial implementation scheme of the light-absorbing structure of the third transition surface 11q and the fourth transition surface 11r. Other light-absorbing structures can also be used for the third transition surface 11q and the fourth transition surface 11r.

[0507] Please see Figure 39 , Figure 39 This is a schematic diagram of a cross-sectional structure of the light-absorbing structure of an optical lens 1 on its non-effective optical surface, provided in an embodiment of this application.

[0508] In some embodiments, the cross-sectional structure of the light-absorbing structure can be serrated. For example, the serrations can be triangular teeth, and there can be multiple triangular teeth with their bases coplanar. The included angle α between the two sides of each triangular tooth can be 90°±0.05°. The width W of the base of the triangular tooth is 0.1 mm, the height H is 0.05 mm, and the R angle of the apex of the triangular tooth (i.e., the intersection of the two sides) is less than 3 μm.

[0509] Please see Figure 40 , Figure 40 This is a schematic diagram of another cross-sectional structure of the light-absorbing structure of an optical lens 1 on its non-effective optical surface, provided in an embodiment of this application.

[0510] In some embodiments, the cross-sectional structure of the light-absorbing structure can be wavy. The wavy shape includes a top edge and a bottom edge that are arranged opposite each other, with the bottom edge being a straight edge and the top edge being a wavy edge.

[0511] It is understood that in some other embodiments, the non-effective optical surface of the optical lens 1 may also be provided with grooves or blind pillars, and then the grooves or blind pillars are coated with black, frosted, or filled with black glue to form a light-absorbing structure. For example, the design of the first transition surface 11e and the second transition surface 11f can refer to the previous embodiments. Figures 10 to 14 The relevant descriptions can be used as a reference for the design of the third transition surface 11q and the fourth transition surface 11r. The main difference between the third transition surface 11q and the fourth transition surface 11r and the first transition surface 11e and the second transition surface 11f is that the ring structure is changed to a column structure. The rest can adopt the same or similar design, which will not be elaborated here.

[0512] Please see Figure 41 , Figure 41 This is a schematic diagram of the structure corresponding to a method for manufacturing an optical lens 1 provided in an embodiment of this application. This manufacturing method can be used to prepare the optical lens 1 in the preceding embodiments. The design of the shape, materials, etc., of the optical lens 1 in the manufacturing method can be referred to the relevant descriptions above. Partial descriptions of the optical lens 1 will follow here, while other details will not be repeated.

[0513] In some embodiments, the method for manufacturing the optical lens 1 includes:

[0514] Step S001: Fabricate prefabricated component 150.

[0515] The preform 150 includes an incident surface 11a, a first reflecting surface 11b, a second reflecting surface 11c, an exiting surface 11d, a first transition surface 11e, and a second transition surface 11f. The incident surface 11a, the second reflecting surface 11c, and the first transition surface 11e are located on one side surface of the preform 150. The incident surface 11a is arranged around the second reflecting surface 11c. The first transition surface 11e connects the incident surface 11a and the second reflecting surface 11c. The first reflecting surface 11b, the exiting surface 11d, and the second transition surface 11f are located on the other side surface of the preform 150. The first reflecting surface 11b is arranged around the exiting surface 11d. The second transition surface 11f connects the first reflecting surface 11b and the exiting surface 11d.

[0516] The preform 150 may further include a third transition surface 11q and a fourth transition surface 11r. The third transition surface 11q is disposed on the same side as and surrounded by the second reflecting surface 11c, and the fourth transition surface 11r is disposed on the same side as and surrounded by the exiting surface 11d. The preform 150 may also include a first bearing surface 11g and a second bearing surface 11h. The first bearing surface 11g is located on the same side surface of the optical lens 1 as the incident surface 11a and surrounds the incident surface 11a. The second bearing surface 11h is located on the same side surface of the optical lens 1 as the first reflecting surface 11b and surrounds the first reflecting surface 11b. The second bearing surface 11h is opposite to the first bearing surface 11g.

[0517] The preform 150 includes an effective optical region 1a, a first ineffective optical region 1b, a second ineffective optical region 1c, and a third ineffective optical region 1d. The effective optical region 1a connects the incident surface 11a, the first reflecting surface 11b, the second reflecting surface 11c, and the exit surface 11d. The first ineffective optical region 1b extends from the first transition surface 11e towards the first reflecting surface 11b. The second ineffective optical region 1c extends from the second transition surface 11f towards the second reflecting surface 11c. The third ineffective optical region 1d connects the third transition surface 11q and the fourth transition surface 11r.

[0518] Step S002: At least one light barrier 130 is formed within the preform 150 by laser engraving process.

[0519] For example, the light-blocking wall 130 is colored and crack-free. The light-blocking wall 130 is used to block light. The light-blocking wall 130 is located in a first ineffective optical region 1b, a second ineffective optical region 1c, and / or a third ineffective optical region 1d. For example, the light-blocking wall 130 is located on the side of the first transition surface 11e facing the first reflective surface 11b, and / or, the light-blocking wall 130 is located on the side of the second transition surface 11f facing the second reflective surface 11c, and / or, the light-blocking wall 130 is located between the third transition surface 11q and the fourth transition surface 11r.

[0520] Step S003: A light-absorbing structure is formed on the non-effective optical surface of the preform 150 to form an optical lens 1.

[0521] The non-effective optical surfaces include a first transition surface 11e, a second transition surface 11f, a third transition surface 11q, a fourth transition surface 11r, a first bearing surface 11g, a second bearing surface 11h, and a peripheral surface 11k. In step S003, a light-absorbing structure can be formed in at least a portion of one or more of the non-effective optical surfaces.

[0522] In this embodiment, by forming a non-destructive light barrier 130 in the non-effective optical area using a laser engraving process, stray light can be effectively prevented from propagating within the optical lens 1, thereby reducing stray light and improving image quality. Furthermore, this process does not cause physical damage to the optical lens 1, which helps ensure the structural and optical performance reliability of the optical lens 1. In addition, light-absorbing structures are also provided on the non-effective optical surface of the optical lens 1 to further reduce stray light and improve image quality.

[0523] Please refer to the following: Figure 41 and Figure 42 , Figure 42 It is the preparation Figure 41 A schematic diagram of the process structure of prefabricated component 150.

[0524] In some embodiments, step S001 may include: pressing the incoming material 160 together using a first mold 601 and a second mold 602 to form a preform 150. The surface profiles of the two side surfaces of the optical lens 1 can be obtained from the surface profiles of the two side surfaces of the preform 150.

[0525] In this embodiment, since the preform 150 can be prepared by integral molding to obtain the shape of the effective optical surface and the non-effective optical surface on both sides of the optical lens 1, it is not only beneficial to ensure the overall structural stability of the optical lens 1, but also to improve the processing efficiency and processing yield.

[0526] The first mold 601 may include a first molding surface 6011 for extruding the incoming material 160, the shape of which matches the shape of one side surface of the optical lens 1. The second mold 602 includes a second molding surface 6021 for extruding the incoming material 160, the shape of which matches the shape of the other side surface of the optical lens 1. The first molding surface 6011 and the second molding surface 6021 are opposite to each other and both face the incoming material 160. In this embodiment, extrusion molding with a mold is beneficial to the stability of the surface shape formed by the optical lens 1.

[0527] In some examples, the molding die may also include a centering ring 603, which is mounted to the second die 602 and sleeved around the periphery of the incoming material 160. During the molding process, after the incoming material 160 is heated, it can be pressed down by the first die 601 so that the first die 601, the second die 602, and the centering ring 603 can mold the incoming material 160 to obtain a preform 150.

[0528] In some examples, the preform 150 can be formed by two molding processes: the first molding uses a centering ring 603 to stabilize the position of the incoming material 160 and reduce the risk of significant tilting of the incoming material 160 during molding; the second molding does not use the centering ring 603, but instead uses the first molding surface 6011 and the second molding surface 6021 to adhere to the two surfaces of the incoming material 160 formed after the first molding, in order to stabilize the position of the incoming material 160 and reduce the risk of significant tilting of the incoming material 160 during molding. It is understood that in other embodiments, the preform 150 may also obtain its final form through more molding processes, and this application does not strictly limit this.

[0529] Understandably, in some embodiments, the molding die may not include the centering ring 603, and the preform 150 is obtained by extruding the incoming material 160 once or multiple times through the first die 601 and the second die 602.

[0530] It is understandable that optical lens 1 can be combined with Figure 20A and Figure 20B The related structure of the illustrated embodiment is used to improve the molding accuracy of the preform 150 in step S001.

[0531] Please refer to the following: Figure 41 , Figure 43A and Figure 43B , Figure 43A It is the preparation Figure 41 Schematic diagram of the structural steps of the Zhongguang retaining wall 130. Figure 43B It is the preparation Figure 41 Schematic diagram of the steps of the Zhongguang retaining wall 130 Figure 2 .

[0532] In this embodiment, the laser engraving process in step S002 can also be called a non-destructive laser engraving process. A modified area is formed by laser modulation of a local area of ​​the preform 150 to create a non-destructive light-blocking wall 130. In this process, the material in the laser-affected area of ​​the optical lens 1 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-blocking wall 130. The non-destructive light-blocking wall 130 typically also lacks physical damage such as burst points. The structure of the light-blocking wall 130 is physically indistinguishable from other areas of the optical lens 1 (such as the effective optical area 1a), except for the color difference. For example, under electron microscopes with 20-micron or 50-micron precision, no obvious structural differences are usually visible; the difference is generally in the chemical bonds. During the processing of the light-blocking wall 130, the surface shape of the optical lens 1 does not change, thus ensuring the manufacturing precision of the effective optical surface. Furthermore, the color of the light-blocking wall 130 also helps to improve the light-blocking effect.

[0533] For example, the preform 150 is made of glass material containing oxide components with a refractive index in the range of 1.49 to 2.1. The oxide components include at least one of boron oxide, titanium oxide, barium oxide, lanthanide oxide, or rubidium oxide. In this case, by setting the material of the preform 150, not only can the subsequently formed optical lens 1 meet the light path propagation requirements, but it also facilitates the formation of a colored and crack-free light barrier 130 within the preform 150. It is understood that in some other embodiments, the oxide components may also be other types of oxides not mentioned above, as long as the optical lens 1 meets its light path propagation requirements and the light barrier 130 can be formed under laser engraving. This application does not strictly limit this aspect.

[0534] The oxide content can be greater than or equal to 5%. In this case, the light-blocking wall 130 can have a darker color and better light-blocking effect. In some examples, the oxide content can be greater than or equal to 10% to further improve the light-blocking effect of the light-blocking wall 130.

[0535] In some embodiments, the laser engraving process in step S002 uses a femtosecond laser or a picosecond laser. In this embodiment, processing the light barrier 130 with a femtosecond laser or a picosecond laser is beneficial for achieving non-destructive engraving, and the processing accuracy is high, ranging from submicron to nanometer level.

[0536] 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 around 10mm / s. In this case, the optical barrier 130 achieves high processing precision and efficiency.

[0537] In some embodiments, step S002 includes: forming multiple stacked blocking layers in the preform 150 by laser engraving process, wherein multiple light spots in each blocking layer are connected as one unit.

[0538] That is, in step S002, multiple light spots are first formed on a certain processing plane, and the multiple light spots are connected to form a barrier layer; then the processing depth is changed, and another barrier layer is formed on another processing plane, which is stacked with the previously processed barrier layer... By processing multiple barrier layers in sequence, the multiple barrier layers together form a light barrier wall 130.

[0539] In step S002, the positional accuracy of the light spot of the blocking layer on the processing plane can be better than 0.02 mm, and the positional accuracy of the blocking layer in the processing depth can be better than 0.15 mm, so as to obtain a light barrier 130 with higher processing accuracy, thereby better meeting the light blocking requirements.

[0540] Among them, such as Figure 43A As shown, in the blocking layer 1304, adjacent light spots 1305 overlap and connect with each other among multiple light spots 1305. The diameter of each light spot 1305 can be, for example, D. The width of the overlapping portion between two adjacent light spots 1305 can be 0 to D, and the total width S of two adjacent light spots 1305 can be less than or equal to 2D. In some examples, the overlapping width of two adjacent light spots 1305 can be around 0.5D, thus making it easier to process various shapes of the blocking layer 1304 to meet the shape requirements of the light barrier 130. Figure 43A The image only shows a portion of the light spot 1305 of the blocking layer 1304, not all of the light spot 1305.

[0541] Among them, such as Figure 43B As shown, the light-blocking wall 130 comprises multiple blocking layers 1304 stacked sequentially in the direction of processing depth (as indicated by the arrow). The number of blocking layers 1304 is related to the thickness of the light-blocking wall 130; the more layers, the thicker the light-blocking wall 130. In some examples, the number of blocking layers 1304 can exceed 10. In this case, the light-blocking wall 130 has a certain thickness, resulting in low transmittance, for example, reducing the transmittance to below 0.3%, thus achieving a good light-blocking effect. The number of blocking layers 1304 can range from 10 to 20. In this case, the light-blocking wall 130 can meet the requirements of both low transmittance and high processing efficiency. Figure 43B The diagram only shows a portion of the barrier layer 1304, not all of the barrier layer 1304.

[0542] in, Figure 43BThe example shown is that all the barrier layers 1304 are connected. In other embodiments, the multiple barrier layers 1304 may not be connected at all, or some of the multiple barrier layers 1304 may be connected and some of the barrier layers 1304 may not be connected.

[0543] It is understood that in some other embodiments, the multiple light spots 1305 in the blocking layer 1304 may not be connected at all, or some of the multiple light spots 1305 may be connected and some of the light spots 1305 may not be connected.

[0544] Please refer to the following: Figure 41 , Figure 44A and Figure 44B , Figure 44A It is the preparation Figure 41 A schematic diagram of the light-absorbing structure located on the surface of preform 150. Figure 44B It is the preparation Figure 41 Schematic diagram of the light-absorbing structure located on the surface of preform 150 Figure 2 .in, Figure 44A From a bird's-eye view, Figure 44B It is a downward-looking perspective.

[0545] In some embodiments, step S003 includes:

[0546] The preform 150 is laser-engraved to cut its outer diameter, forming a peripheral side surface 11k, which is a frosted surface; and / or,

[0547] The first transition surface 11e and / or the second transition surface 11f are atomized using laser engraving; and / or

[0548] The third transition surface 11q, the fourth transition surface 11r, the first bearing surface 11g, and / or the second bearing surface 11h are atomized using laser engraving.

[0549] In this embodiment, since the peripheral side 11k can be formed by cutting the outer diameter of the preform 150, the incoming material 160 can be over-designed when manufacturing the preform 150, so that the periphery of the preform 150 overflows when molding the preform 150, thereby ensuring the fullness of each facet of the two surfaces of the preform 150, improving the processing accuracy of the effective optical surface of the optical lens 1, and making the optical performance of the optical lens 1 better.

[0550] Among these methods, laser engraving is used for outer diameter cutting; for example, it can be used to cut the outer diameter of a material. Figure 43A and Figure 43BThe preform 150 is cut at the dotted line position. In this embodiment, while cutting the preform 150 and forming the peripheral side surface 11k, the peripheral side surface 11k is formed into a frosted surface, thereby having the ability to absorb stray light, so as to reduce stray light of the optical lens 1 and improve the imaging quality of the optical lens 1.

[0551] Among them, by using laser engraving technology to atomize the non-effective optical surface of the optical lens 1, the stray light of the optical lens 1 can be further reduced and the imaging quality of the optical lens 1 can be improved.

[0552] It is understandable that in step S003, multiple surfaces of the preform 150 are processed using the same laser engraving process, resulting in high processing efficiency and low processing cost. The aforementioned laser engraving process is destructive laser engraving, which achieves material cutting and surface atomization by disrupting the structure of the laser-treated area.

[0553] In some other embodiments, other processes may be used to cut the outer diameter of the preform 150, such as wire cutting, tool cutting or grinding, etc., and the embodiments of this application do not strictly limit this.

[0554] In some other embodiments, microstructures can also be processed on the first transition surface 11e, the second transition surface 11f, the third transition surface 11q, the fourth transition surface 11r, the first bearing surface 11g and / or the second bearing surface 11h by laser engraving to form microstructure surfaces.

[0555] In some other embodiments, light-blocking layers can also be formed on the first transition surface 11e, the second transition surface 11f, the third transition surface 11q, the fourth transition surface 11r, the first bearing surface 11g, and / or the second bearing surface 11h by a non-destructive laser engraving process. The performance of the light-blocking layers is the same as or similar to that of the light-blocking wall 130.

[0556] In some other embodiments, the method of manufacturing the optical lens 1 may not include step S003. In this case, the optical lens 1 can be formed in step S002. That is, step S002 is: forming at least one light barrier 130 in the preform 150 by laser engraving process to form the optical lens 1.

[0557] In some embodiments, after forming the light-absorbing structure on the non-effective optical surface of the preform 150 in step S003, the main focus is on forming the lens body. Step S003 may further include: coating the outer surface of the lens body with a film and then blackening it. The coating may include, but is not limited to, high-reflection films, anti-reflection films, and isolation films, as specifically described in the preceding embodiments (e.g., ...). Figures 22 to 30 The relevant content (including the above) will not be elaborated here. Blackening can be applied to the outer side of the high-reflectivity film and / or the outer side of the light-absorbing structure. Alternatively, step S003 may not include blackening.

[0558] As mentioned in the preceding embodiments, the lens body of the optical lens 1 can be formed by two or more molding processes. This molding method has high process requirements. For example, if the incoming material does not adhere completely to the molding surface of the mold during the second molding, the optical lens 1 may suffer from poor appearance due to trapped air. Based on this, this application also proposes an optical lens 1 formed by a single molding process.

[0559] Please refer to the following: Figure 45 and Figure 46 , Figure 45 yes Figure 2 The diagram shows the internal structure of the optical lens 1 in some other embodiments. Figure 46 yes Figure 45 The diagram shows the structure of the optical lens 1 during the molding process. Figure 45 The optical lens 1 shown includes most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the most common technical features of the two will not be repeated.

[0560] In some embodiments, a protrusion 170 is provided near the optical axis on at least one side surface of the optical lens 1. In this case, during the molding process of the optical lens 1, a groove is formed in the molding die corresponding to the position of the protrusion 170. This groove can be used to position the center of the incoming material and helps to stably place the incoming material in the molding die. The optical lens 1 can be molded in one step, which can not only improve molding efficiency (reduced number of molding times), reduce the number of moldings, and reduce manufacturing costs, but also avoid the appearance defects caused by air trapping problems caused by secondary molding or multiple molding, thereby improving the processing accuracy of molding and obtaining optical lenses 1 with a high yield.

[0561] The protrusion 170 can be disposed on the third transition surface 11q and / or the fourth transition surface 11r. In this case, the position of the protrusion 170 corresponds to the ineffective optical surface and ineffective optical area of ​​the optical lens 1, and will not affect the optical performance of the optical lens 1. In this embodiment, the protrusion 170 is disposed on the third transition surface 11q as an example. In this case, the area of ​​the third transition surface 11q is relatively large, making it easier to arrange the protrusion 170, and the shape and size of the protrusion 170 are relatively easy to meet the requirements of molding and positioning. The third transition surface 11q can be entirely formed to form the protrusion 170, or a portion of the third transition surface 11q can also be formed to form the protrusion 170.

[0562] In some embodiments, the second molding surface 6021 of the second mold 602 of the molding die is provided with a groove 6022, the shape of which is the same as the shape of the protrusion 170 to be formed on the optical lens 1. The incoming material 160 is placed on the second molding surface 6021 of the second mold 602, with a portion of its structure inserted into the groove 6022, and a portion of its surface conforming to the groove wall of the groove 6022. During the molding process, the incoming material 160 is stably supported and molded, which helps to improve the forming accuracy of the preform 150. The preform 150 is used to form the optical lens 1, and the forming accuracy of the optical lens 1 is also relatively good.

[0563] When the protrusion 170 is provided on the third transition surface 11q, a portion of the second molding surface 6021 can have the same shape as one side surface of the optical lens 1 including the third transition surface 11q, and a portion of the first molding surface 6011 of the first mold 601 can have the same shape as one side surface of the optical lens 1 including the fourth transition surface 11r.

[0564] In some embodiments, the method of manufacturing the optical lens 1 may include step S001 (i.e., manufacturing the preform 150) as follows: pressing the incoming material 160 by aligning the first mold 601 and the second mold 602 to form the preform 150.

[0565] The first mold 601 includes a first molding surface 6011 for extruding the incoming material 160, and the second mold 602 includes a second molding surface 6021 for extruding the incoming material 160. A groove 6022 is provided in the central area of ​​the second molding surface 6021. The incoming material 160 is typically oblate or spherical. When the incoming material 160 is oblate, it may include two opposing spherical cap surfaces.

[0566] In this embodiment, since the center area of ​​the second molding surface 6021 is provided with a groove 6022, the incoming material 160 is stably supported and molded during the molding process, which helps to improve the molding accuracy of the preform 150.

[0567] It is understood that other aspects of the manufacturing method of the optical lens 1 in this embodiment can be referred to the description of the previous embodiment, and will not be repeated here.

[0568] In some embodiments, the outer surface (also known as the top surface) of the protrusion 170 can be spherical, aspherical, spline surface, etc. The design of the protrusion 170 can facilitate the setting of corresponding grooves in the mold, and the grooves can stably place the incoming material 160 during the molding process.

[0569] For example, the radius of curvature of the outer surface of the protrusion 170 is less than or equal to the radius of curvature of the incident surface 11a. It is understood that the radius of curvature of the groove wall of the groove 6022 of the second molding surface 6021 of the second mold 602 is the same as the radius of curvature of the outer surface of the protrusion 170, and the curvature of the spherical surface of the material 160 is also the same as the radius of curvature of the outer surface of the protrusion 170. The second molding surface 6021 also includes an incident surface molding region 6023 corresponding to the incident surface 11a of the optical lens 1, and the radius of curvature of the incident surface molding region 6023 is consistent with the radius of curvature of the incident surface 11a. The radius of curvature of the outer surface of the protrusion 170 is less than or equal to the radius of curvature of the incident surface 11a. Correspondingly, the radius of curvature of the groove wall of the groove 6022 and the radius of curvature of the incoming material 160 are less than or equal to the radius of curvature of the molding area 6023 of the incident surface. In this way, it can play a centering role during the molding process and avoid or reduce the risk of air entrapment, thereby improving the molding accuracy of the optical lens 1.

[0570] For example, the diameter of the protrusion 170 can be greater than or equal to 1.5 mm, such as 1.6 mm, 1.65 mm, 1.8 mm, 1.92 mm, 2 mm, etc. Alternatively, the ratio of the diameter of the protrusion 170 to the diameter of the second reflective surface 11c can be greater than or equal to 1 / 5, such as 1 / 4, 2 / 7, 1 / 3, etc. In this case, the design of the protrusion 170 will not reduce the optical performance of the optical lens 1 and will help stabilize the incoming material 160 during the molding process, thereby improving the manufacturing yield of the optical lens 1.

[0571] The outer surface of the protrusion 170 is a frosted surface, a blackened surface, a microstructured surface, or is covered with a light-absorbing layer. In this case, the protrusion 170 can absorb stray light and block its propagation, which is beneficial to improving the optical performance of the optical lens 1.

[0572] Please see Figure 47 , Figure 47 yes Figure 45 The optical lens 1 shown is a three-dimensional structural diagram in some embodiments.

[0573] In some embodiments, the first transition surface 11e of the optical lens 1 and the outer surface of the protrusion 170 may be provided with light-absorbing structures, including but not limited to one or more of atomization, blackening, and microstructure. A first light-blocking wall 1301 is engraved in the first ineffective optical region 1b, and a second light-blocking wall 1302 is engraved in the second ineffective optical region 1c.

[0574] Please refer to the following: Figure 48 and Figure 49 , Figure 48 yes Figure 2 The diagram shows the internal structure of the optical lens 1 in some other embodiments. Figure 49 yes Figure 48The diagram shows the structure of the optical lens 1 during the molding process. Figure 48 The optical lens 1 shown includes most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the most common technical features of the two will not be repeated.

[0575] The main difference between the optical lens 1 in this embodiment and the previous embodiment is that the incident surface 11a of the optical lens 1 can be a plane, the second reflecting surface 11c is a concave surface, and at least a portion of the third transition surface 11q is set as a plane.

[0576] One surface of the incoming material 160 used for molding optical lens 1 is a flat surface, and the other surface is a spherical cap surface.

[0577] The mold for molding the optical lens 1 includes a first mold 601 and a second mold 602. At least a portion of the shape of the first molding surface 6011 of the first mold 601 is identical to the shape of one side surface of the optical lens 1, including the first reflecting surface 11b and the exiting surface 11d. At least a portion of the shape of the second molding surface 6021 of the second mold 602 is identical to the shape of one side surface of the optical lens 1, including the incident surface 11a and the second reflecting surface 11c. The central region of the second molding surface 6021 forms a plane 6024, the shape of which is consistent with the shape of the plane of the third transition surface 11q.

[0578] At this time, during the molding process of the optical lens 1, the plane of the central area of ​​the second molding surface 6021 can be used to position the center of the incoming material 160, and it also helps to stably place the incoming material in the molding die. The optical lens can be molded in one step, which not only improves molding efficiency (reducing the number of molding cycles), reduces the number of molding cycles, and lowers manufacturing costs, but also avoids the appearance defects caused by air entrapment problems resulting from secondary or multiple molding processes. This improves the processing accuracy of molding and thus obtains optical lenses 1 with a high yield. Furthermore, the risk of air entrapment during the molding process is low, which also helps to improve the molding accuracy of the optical lens 1.

[0579] Please see Figure 50 , Figure 50 yes Figure 2 The diagram shows the internal structure of the optical lens 1 in some other embodiments. Figure 50 The optical lens 1 shown includes most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the most common technical features of the two will not be repeated.

[0580] The main difference between the optical lens 1 in this embodiment and the previous embodiment is that the exit surface 11d of the optical lens 1 is a convex surface, the radius of curvature of the exit surface 11d is smaller than the radius of curvature of the first reflecting surface 11b, and the fourth transition surface 11r and the exit surface 11d of the optical lens 1 are smoothly connected curved surfaces.

[0581] During the molding process of the optical lens 1, a groove is formed in the molding die at the position corresponding to the ejection surface 11d and the fourth transition surface 11r. This groove can be used to position the center of the incoming material and help to place the incoming material stably in the molding die. The optical lens 1 can be molded in one step, which can not only improve molding efficiency (reduced number of molding times), reduce the number of moldings, and reduce manufacturing costs, but also avoid the appearance defects caused by air trapping problems caused by secondary molding or multiple moldings. This can improve the processing accuracy of molding and thus obtain an optical lens 1 with a high yield.

[0582] Please see Figure 51 , Figure 51 yes Figure 2 The diagram shows the internal structure of the optical lens 1 in some other embodiments. Figure 51 The optical lens 1 shown includes most of the technical features of the optical lens 1 in the previous embodiment. The following mainly describes the differences between the two, and the most common technical features of the two will not be repeated.

[0583] The main difference between the optical lens 1 in this embodiment and the previous embodiment is that the optical lens 1 further includes a filler 18, which covers at least a portion of the second reflective surface 11c and the first transition surface 11e. In some examples, the top surface of the filler 18 may be flush with the highest point of the first transition surface 11e. The filler 18 is made of a light-absorbing material or a light-blocking material; for example, the filler 18 may be made of black resin or other materials. The surfaces of the second reflective surface 11c, the first transition surface 11e, and the third transition surface 11q may be frosted surfaces or microstructured surfaces.

[0584] In the optical lens 1, when a sharp corner structure is formed at the first transition surface 11e, the sharp corner structure may have a color difference problem (i.e., gold edge) when viewed from different angles. In this embodiment, the optical lens 1 removes the sharp corner structure by setting the filler 18, thereby effectively solving the above-mentioned color difference problem and improving the optical performance of the optical lens 1.

[0585] It is understood that the filler 18 in this embodiment can also be applied to other embodiments. The design of the filler 18 can be combined with the light-absorbing structure and film layer design on the surface of the lens body, as well as the light-blocking structure such as the light-blocking wall inside the lens body.

[0586] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0587] It should be noted that all the above figures are exemplary illustrations of this application and do not represent the actual size of the product. Furthermore, the dimensional proportions between the components in the figures are not intended to limit the actual product of this application.

[0588] The above are merely some embodiments and implementation methods of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An optical lens (1), characterized in that, The lens body (11) of the optical lens (1) includes an incident surface (11a), a first reflecting surface (11b), a second reflecting surface (11c), and an exiting surface (11d). The incident surface (11a) and the second reflecting surface (11c) are located on one side surface of the lens body (11), and the incident surface (11a) is arranged around the second reflecting surface (11c). The first reflecting surface (11b) and the exiting surface (11d) are located on the opposite side surface of the lens body (11), and the first reflecting surface (11b) is arranged around the exiting surface (11d). Light can enter through the incident surface (11a), and after being reflected sequentially by the first reflecting surface (11b) and the second reflecting surface (11c), it exits through the exiting surface (11d). An annular light-absorbing surface (111) is provided between the incident surface (11a) and the second reflecting surface (11c) and / or between the first reflecting surface (11b) and the exiting surface (11d); The light-absorbing surface (111) is configured as a frosted surface, a blackened surface or a microstructure surface, and / or, a light-absorbing layer (119) is provided on the light-absorbing surface (111).

2. The optical lens (1) of claim 1, characterized in that, The width of the light-absorbing surface (111) is greater than or equal to 0.1 mm.

3. The optical lens (1) of claim 1 or 2, characterized in that, The light-absorbing surface (111) is in the form of a circular ring, a petal ring, or a serrated ring.

4. The optical lens (1 ) according to any one of claims 1 to 3, characterized in that, The microstructure surface includes a raised microstructure (1116), the microstructure (1116) including a first surface (1116a) and a second surface (1116b), both the first surface (1116a) and the second surface (1116b) are annular, and the angle between the first surface (1116a) and the second surface (1116b) is in the range of 30° to 120°.

5. The optical lens (1 ) according to any one of claims 1 to 3, characterized in that, At least a portion of the light-absorbing surface (111) is recessed into the interior of the lens body (11) to form a groove (1111), and the light-absorbing layer (119) is fixed to the groove wall of the groove (1111).

6. An optical lens (1) as claimed in any one of Claims 1 to 3, characterized in that, At least a portion of the light-absorbing surface (111) is recessed into the interior of the lens body (11) to form a groove (1111), and the optical lens (1) includes a buffer adhesive (115) that fills the groove (1111).

7. The optical lens (1) of claim 6, characterized in that, The buffer adhesive (115) is a non-transparent adhesive; Alternatively, the light-absorbing layer (119) is fixed to the groove wall of the groove (1111), and the buffer adhesive (115) is connected to the light-absorbing layer (119).

8. An optical lens (1 ) according to any one of claims 1 to 3, characterized in that, The light-absorbing surface (111) includes an inner ring region (1112), a middle region (1113), and an outer ring region (1114) connected in sequence. The inner ring region (1112) and / or the outer ring region (1114) are recessed into the interior of the lens body (11) to form an ink overflow groove (1115). The light-absorbing layer (119) is an ink layer. The light-absorbing layer (119) is provided at least in the middle region (1113) and the ink overflow groove (1115).

9. An optical lens (1 ) according to any one of claims 1 to 3, characterized in that, The lens body (11) has a first refractive index Nd1, and the light-absorbing layer (119) has a second refractive index Nd2, |Nd1-Nd2|≤0.

1.

10. An optical lens (1 ) according to any one of claims 1 to 3, characterized in that, The light-absorbing surface (111) is provided with a plurality of protrusions (1117), and the plurality of protrusions (1117) are arranged at intervals along the circumference of the light-absorbing surface (111).

11. An optical lens (1) as claimed in claim 10, characterized in that, The light-absorbing surface (111) is also provided with a protruding ring (1118), which connects to a plurality of protrusions (1117), and the protrusions (1117) protrude relative to the protruding ring (1118).

12. The optical lens (1 ) according to any one of claims 1 to 11, characterized in that, The lens body (11) has a light blocking structure (116) inside, which is located between the incident surface (11a) and the exit surface (11d).

13. The optical lens (1) of claim 12, characterized in that, The light-blocking structure (116) is a fogging structure or a blackening structure.

14. The optical lens (1 ) according to any one of claims 1 to 13, characterized in that, The lens body (11) includes a first lens body (112), a medium layer (113), and a second lens body (114) stacked in sequence. The incident surface (11a) and the second reflecting surface (11c) are located on the first lens body (112), and the first reflecting surface (11b) and the exit surface (11d) are located on the second lens body (114). The medium layer (113) includes a first surface (1131) connecting the first lens body (112) and a second surface (1132) connecting the second lens body (114). The first surface (1131) and the second surface (1132) are parallel to each other. The medium layer (113) is made of a light-transmitting material.

15. An optical lens (1) as claimed in claim 14, characterized in that, The thickness of the dielectric layer (113) is less than or equal to 100 μm.

16. An optical lens (1) as claimed in claim 14 or 15, characterized in that, The first mirror body (112) has a third refractive index Nd3, and the dielectric layer (113) has a fourth refractive index Nd4, 0.9≤Nd4 / Nd3≤1.1; The second mirror (114) has a fifth refractive index Nd5, 0.9≤Nd4 / Nd5≤1.

1.

17. An optical lens (1 ) according to any one of claims 14 to 16, characterized in that, The first mirror body (112) includes an inner surface (1121) facing the medium layer (113), and the second mirror body (114) includes an inner surface (1141) facing the medium layer (113). At least one of the first surface (1131), the second surface (1132), the inner surface (1121) of the first mirror body (112), and the inner surface (1141) of the second mirror body (114) is provided with a light-blocking region (117), and the light-blocking region (117) is a fogged structure, a blackened structure, a microstructure, or is provided with a light-blocking layer.

18. An optical lens (1 ) according to any one of claims 14 to 16, characterized in that, The optical lens (1) includes a light blocking element (118), which is inserted into the dielectric layer (113) and located between the incident surface (11a) and the exit surface (11d).

19. The optical lens (1 ) according to any one of claims 1 to 18, characterized in that, The lens body (11) further includes a first transition surface (11e) and a second transition surface (11f), wherein the first transition surface (11e) is connected between the incident surface (11a) and the second reflecting surface (11c), and the second transition surface (11f) is connected between the first reflecting surface (11b) and the exiting surface (11d); The optical lens (1) includes at least one light barrier (130) located on the side of the first transition surface (11e) facing the first reflective surface (11b), and / or, the light barrier (130) located on the side of the second transition surface (11f) facing the second reflective surface (11c). The light barrier (130) is colored and has no cracks.

20. An optical lens (1) as claimed in claim 19, characterized in that, The optical lens (1) is made of glass material containing oxide components with a refractive index in the range of 1.49 to 2.1, and the oxide components include at least one of boron oxide, titanium oxide, barium oxide, lanthanide oxide or rubidium oxide.

21. An optical lens (1) as claimed in claim 19 or 20, characterized in that, The light barrier (130) is black, brown, grayish-white, or yellow.

22. An optical lens (1 ) according to any one of claims 19 to 21, characterized in that, The light barrier (130) comprises multiple barrier layers arranged in a stacked manner; The adjacent barrier layers are connected or spaced apart; and / or, the number of barrier layers is more than 10; and / or, the thickness of the barrier layers is in the range of 100 micrometers to 300 micrometers.

23. An optical lens (1) as claimed in claim 22, characterized in that, The arrangement direction of the plurality of blocking layers is parallel to the optical axis (1o) of the optical lens (1), or forms an angle of less than 45° with the optical axis (1o) of the optical lens (1).

24. An optical lens (1 ) according to any one of claims 19 to 23, characterized in that, The optical lens (1) further includes a third transition surface (11q) and a fourth transition surface (11r). The third transition surface (11q) and the second reflecting surface (11c) are located on the same side surface of the optical lens (1) and are surrounded by the second reflecting surface (11c). The fourth transition surface (11r) and the exiting surface (11d) are located on the same side surface of the optical lens (1) and are surrounded by the exiting surface (11d). At least one of the light-blocking walls (130) is located between the third transition surface (11q) and the fourth transition surface (11r).

25. An optical lens (1 ) according to any one of claims 19 to 23, characterized in that, The optical lens (1) further includes a third transition surface (11q), which is located on the same side surface of the optical lens (1) as the second reflective surface (11c) and is surrounded by the second reflective surface (11c). The third transition surface (11q) is provided with a protrusion (170).

26. The optical lens (1) as claimed in claim 25, characterized in that, The radius of curvature of the outer surface of the protrusion (170) is less than or equal to the radius of curvature of the incident surface (11a).

27. The optical lens (1) as described in claim 25 or 26, characterized in that, The outer surface of the protrusion (170) is a fogged surface, a blackened surface, a microstructured surface, or is covered with a light-absorbing layer.

28. The optical lens (1) as described in any one of claims 19 to 23, characterized in that, The optical lens (1) further includes a filler (18) that covers at least a portion of the second reflective surface (11c) and the first transition surface (11e), and the filler (18) is made of a light-absorbing material or a light-blocking material.

29. The optical lens (1) as claimed in any one of claims 1 to 28, characterized in that, The optical lens (1) includes a first high-reflection film (12) and a second high-reflection film (13), wherein the first high-reflection film (12) covers the first reflective surface (11b) and the second high-reflection film (13) covers the second reflective surface (11c); The optical lens (1) further includes a first isolation film (14), which covers the second high-reflectivity film (13); The optical lens (1) further includes a first anti-reflection film (15) and a second anti-reflection film (16), wherein the first anti-reflection film (15) covers the incident surface (11a) and the first isolation film (14), and the second anti-reflection film (16) covers the exit surface (11d).

30. The optical lens (1) as claimed in claim 29, characterized in that, The optical lens (1) further includes a second isolation film (17), which covers the first high reflectivity film (12), and the second antireflection film (16) also covers the second isolation film (17).

31. The optical lens (1) as described in any one of claims 1 to 30, characterized in that, The optical lens (1) also includes a peripheral side surface (11k), which is connected circumferentially between the two side surfaces of the lens body (11). At least a portion of the peripheral side surface (11k) is a frosted structure, a blackened structure, or has a light-absorbing layer.

32. The optical lens (1) as claimed in claim 1, characterized in that, The incident surface (11a) can be a plane, a convex surface, or a concave surface; And / or, the first reflective surface (11b) is a plane, a convex surface, or a concave surface; And / or, the second reflective surface (11c) is a plane, a convex surface, or a concave surface; And / or, the exit surface (11d) is a plane, a convex surface, or a concave surface.

33. A camera module (10), characterized in that, It includes a lens group (3), an image sensor (6), and an optical lens (1) as claimed in any one of claims 1 to 32, wherein the lens group (3) is located between the optical lens (1) and the image sensor (6).

34. The camera module (10) as described in claim 33, characterized in that, The camera module (10) also includes a first optical path folding element (2) and a lens barrel (7); The lens barrel (7) encloses and forms an installation space (71). The optical lens (1), the first optical path folding element (2) and the lens group (3) are all installed in the installation space (71). The first optical path folding element (2) is located between the optical lens (1) and the lens group (3). The first optical path folding element (2) is used to change the propagation direction of light.

35. An electronic device (100), characterized in that, It includes a housing (30) and a camera module (10) as described in claim 33 or 34, the camera module (10) being mounted on the housing (30).

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