Lens barrel, camera module and electronic equipment

Abstract

The invention provides a lens cone, a camera module and electronic equipment, and aims to reduce the light reflectivity of the surface of the lens cone, thereby reducing the risk that a user observes the eccentricity problem of the lens cone visually, and improving the user experience. The lens barrel comprises a first surface, the first surface of the lens barrel comprises a plurality of grooves arranged in an array, the inner wall of each groove comprises a plurality of protrusions, the grooves are of micron-scale structures, the protrusions are of nano-scale structures, the protrusions are arranged on the inner walls of the grooves in a disordered state, and the protrusions are arranged on the inner walls of the grooves. Therefore, the inner wall of the groove and the first surface of the lens cone are in an uneven frosted form.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a lens barrel, a camera module and electronic equipment. Background Art

[0002] The camera module is a module component that enables electronic devices to realize the functions of taking photos and videos. In electronic devices equipped with camera modules, the housing of the electronic device is usually installed with a camera decoration, and the camera decoration is provided with a light inlet, which can be used to connect the inside of the electronic device with the outside. The lens barrel of the camera module is at least partially exposed in the light inlet, so that the camera module can collect ambient light outside the electronic device. In the process of assembling the whole electronic device, due to limited assembly accuracy, the axis of the lens barrel of the camera module and the axis of the light inlet of the camera decoration are often not coaxial, and because there is a color difference between the lens barrel and the camera decoration, if there is an eccentricity problem, the user will easily see it from the appearance of the electronic device, resulting in a decrease in the user experience. Summary of the invention

[0003] The present application provides a lens barrel, a camera module and an electronic device to reduce the light reflectivity of the lens barrel surface, thereby visually reducing the risk of users observing the lens barrel eccentricity problem and improving the user experience.

[0004] In the first aspect, the present application provides a lens barrel, wherein the first surface of the lens barrel includes a plurality of grooves arranged in an array, the inner wall of each groove includes a plurality of protrusions, wherein the groove is a micrometer-level structure, the plurality of protrusions are nanometer-level structures, the plurality of protrusions are arranged in a disordered state on the inner wall of the groove, and the spacing between two adjacent protrusions is greater than or equal to 50 nanometers and less than or equal to 300nm. In addition, since a depression can be formed between two adjacent protrusions, it can also be understood that the radial size of the depression is between 50nm and 300nm. The plurality of grooves and the plurality of protrusions and the plurality of depressions in each groove make the first surface of the lens barrel present an uneven frosted shape. After the light is irradiated to the first surface of the lens barrel, the plurality of protrusions and the plurality of depressions in the groove can cause the light to be diffusely reflected, and most of the reflected light will be reflected again on the first surface of the lens barrel, and since the light has a certain loss in each reflection process, the light will be weakened after each reflection, so that after multiple reflections, the light will gradually dissipate on the surface of the lens barrel, thereby reducing the light reflectivity of the first surface of the lens barrel. For electronic devices using the lens barrel, the color presented by the lens barrel, camera decoration and lens is basically consistent, so the risk of users observing the eccentricity of the lens barrel can be visually reduced, thereby improving the user experience.

[0005] In some embodiments, the topography of the first surface of the lens barrel can be formed by a laser laser engraving process. When the laser spot scans the first surface of the lens barrel, the position on the surface of the lens barrel where the laser spot is scanned will be reduced by the ultrafast laser, thereby forming a groove at the scanning position of the laser spot. In addition, under the irradiation of the laser, heat accumulation will form in the formed groove, and this heat will further cause the inner wall of the groove to reduce material, thereby forming a plurality of protrusions and a plurality of depressions arranged in disorder on the inner wall of the groove. Among them, the radial size of the protrusions and depressions is related to the wavelength of the laser. Generally speaking, the radial size of the protrusions and depressions is roughly between one quarter of a wavelength and one half of a wavelength.

[0006] In some embodiments, the cross-sectional shape of the groove perpendicular to the axial direction of the lens barrel may be substantially circular, and the diameter of the groove may be greater than or equal to 2um and less than or equal to 40um. The diameter of the groove is determined by the diameter of the laser spot. If the diameter of the groove is too small, the number of laser scans will increase, thereby increasing the complexity of the process. If the diameter of the groove is too large, macroscopic roughness will easily form on the first surface of the lens barrel, affecting the appearance quality of the lens barrel. By designing the diameter of the groove within the above range, the desired frosted morphology can be formed inside the groove through appropriate heat accumulation in a relatively simple process.

[0007] In some embodiments, the plurality of grooves are arranged along the circumference of the lens barrel into a plurality of annular structures, the plurality of annular structures can be coaxially arranged, and the spacing between any two adjacent annular structures is the same. Exemplarily, the axes of the plurality of annular structures are coaxially arranged with the axis of the lens barrel. Based on the approximately cylindrical appearance of the lens barrel, the annular structure formed by the grooves can match the structure of the lens barrel, facilitating the laser engraving path planning during the laser engraving process, thereby helping to simplify the manufacturing process of the lens barrel.

[0008] In some embodiments, the spacing l between two adjacent annular structures and the diameter d of the groove satisfy: d / 2≤l≤d. With this design, the edges of the grooves of the two adjacent annular structures can be connected or even overlapped with each other, thereby increasing the coverage area of ​​the grooves on the first surface of the lens barrel, and using the uneven inner wall of the groove to reduce the light reflectivity of the first surface of the lens barrel.

[0009] In some embodiments, in the same annular structure, the spacing s between two adjacent grooves and the diameter d of the grooves satisfy: s≤d / 2. This size design allows adjacent grooves to overlap each other, thereby further increasing the coverage area of ​​the grooves on the first surface of the lens barrel, and using the uneven inner wall of the groove to reduce the light reflectivity of the first surface of the lens barrel.

[0010] In some embodiments, the lens barrel may be made of a material with a light-absorbing effect, so that a portion of the light can be absorbed by the lens barrel in addition to the light loss itself during the reflection process, thereby further reducing the light reflectivity of the first surface of the lens barrel.

[0011] In the second aspect, the present application further provides a lens barrel, wherein the first surface of the lens barrel includes a plurality of protrusions, the plurality of protrusions are arranged in a disordered state on the first surface of the lens barrel, and the spacing between two adjacent protrusions is greater than or equal to 0.5um and less than or equal to 10um. In addition, since a depression can be formed between two adjacent protrusions, it can also be understood that the radial size of the depression is between 0.5um and 10um. The plurality of protrusions and the plurality of depressions can make the first surface of the lens barrel present an uneven frosted shape. After the light is irradiated to the first surface of the lens barrel, the plurality of protrusions and the plurality of depressions can make the light diffusely reflected, and most of the reflected light will be reflected again on the first surface of the lens barrel. Since the light has a certain loss in each reflection process, the light will be weakened after each reflection, so that after multiple reflections, the light will gradually dissipate on the surface of the lens barrel, thereby reducing the light reflectivity of the first surface of the lens barrel. For electronic devices using the lens barrel, the color presented by the lens barrel and the camera decorative parts and the lens is basically the same, so the risk of the user observing the eccentricity of the lens barrel can be visually reduced, and the user's experience can be improved.

[0012] In some embodiments, the morphology of the first surface of the lens barrel can be formed by any one of injection molding, nanoimprinting, plasma etching, sandblasting, and chemical treatment. These molding methods have the advantages of low cost and simple process, so that the lens barrel can achieve the low reflectivity characteristics of its first surface at a lower cost.

[0013] In some embodiments, the height of the protrusion may be greater than or equal to 0.5um and less than or equal to 10um. In addition, the radial dimension of the protrusion may be greater than or equal to 0.5um and less than or equal to 10um. When the size of the protrusion is within this range, a better diffuse reflection effect of light can be achieved.

[0014] In some embodiments, the heights of the plurality of protrusions may be different, or some of the protrusions may have the same height and others may have different heights, so as to enhance the frosting effect of the first surface of the lens barrel and help further reduce the reflectivity of the first surface of the lens barrel.

[0015] In some embodiments, the radial dimensions of the plurality of protrusions may be different, or the radial dimensions of some of the protrusions may be the same, while the radial dimensions of other protrusions may be different. Similarly, this design can also enhance the frosting effect of the first surface of the lens barrel, which helps to further reduce the reflectivity of the first surface of the lens barrel.

[0016] In some embodiments, the lens barrel may be made of a material with a light-absorbing effect, so that a portion of the light can be absorbed by the lens barrel in addition to the light loss itself during the reflection process, thereby further reducing the light reflectivity of the first surface of the lens barrel.

[0017] In the third aspect, the present application further provides a lens barrel, wherein the first surface of the lens barrel includes a microstructure layer, the microstructure layer includes a plurality of particle structures, the plurality of particle structures are nanoscale structures, the plurality of particle structures can be arranged in a disordered state in the horizontal direction of the microstructure layer, and the plurality of particle structures can also be arranged in a disordered state in the thickness direction of the microstructure layer, so that the first surface of the lens barrel presents an uneven frosted shape. After the light is irradiated to the first surface of the lens barrel, the particle structure in the microstructure layer can cause the light to be diffusely reflected, and most of the reflected light will be reflected again on the first surface of the lens barrel. Since the light has a certain loss in each reflection process, the light will be weakened after each reflection, so that after multiple reflections, the light will gradually dissipate on the surface of the lens barrel, thereby reducing the light reflectivity of the first surface of the lens barrel. For electronic devices using the lens barrel, the color presented by the lens barrel, the camera decorative parts and the lens is basically the same, so the risk of the user observing the eccentricity of the lens barrel can be visually reduced, and the user's experience can be improved.

[0018] In some embodiments, the shapes of multiple particle structures can be different, or some of the particle structures can have the same shape and other particle structures can have different shapes, so as to enhance the frosting effect of the first surface of the lens barrel and help further reduce the reflectivity of the first surface of the lens barrel.

[0019] In some embodiments, the microstructure may be an ink layer, and the components of the ink layer may include solvents, resins, pigments, and additives, wherein the proportions of resins, pigments, and additives may be 75-97%, 2-20%, and 1-5%, respectively. The pigment is the main component in the ink layer for reducing reflectivity, and it exists in the ink layer in the form of tiny particles, so the pigment particles form the above-mentioned particle structure.

[0020] In some embodiments, the ink layer can be formed by printing, spraying or inkjet printing, and the thickness of the ink layer can be greater than or equal to 1 um and less than or equal to 100 um. In addition, the diameter of the pigment particles in the ink layer can be greater than or equal to 0.05 um and less than or equal to 10 um, so that the ink layer presents an uneven frosted state through the disordered arrangement of multiple pigment particles in the ink layer.

[0021] In some embodiments, the solvent in the ink layer can be a mixture of one or more of water, alcohols, ketones or benzene. The resin can be any one of epoxy resin, acrylic resin, polyurethane resin, polyester resin. The pigment can be a mixture of one or more of carbon black, carbon nanotubes, graphite, graphene and the like. The additive can be any one of a leveling agent, a defoaming agent, and a surfactant, and the additive can promote the ink to achieve better molding and coating, improve the leveling of the ink and reduce the viscosity of the ink.

[0022] In some embodiments, the microstructure layer may also be a carbonized layer, and the carbonized particles in the carbonized layer may be formed into the above-mentioned particle structure. The disordered arrangement of the carbonized particles in the carbonized layer makes the carbonized layer present an uneven frosted state.

[0023] In some embodiments, the carbonized layer can be formed by carbonizing the surface of the lens barrel using a laser engraving process. When the laser spot scans the surface of the lens barrel, the material on the surface of the lens barrel is carbonized under the action of extremely high local temperature to form granular substances. These granular substances are carbonized particles.

[0024] In some embodiments, the lens barrel may be made of a material with a light-absorbing effect, so that a portion of the light can be absorbed by the lens barrel in addition to the light loss itself during the reflection process, thereby further reducing the light reflectivity of the first surface of the lens barrel.

[0025] In a fourth aspect, the present application provides a camera module, which includes a module circuit board, a photosensitive chip, a lens, and a lens barrel in any one of the embodiments of the first to third aspects, wherein the lens barrel includes a second surface, and the second surface of the lens barrel is arranged opposite to the first surface thereof. The lens can be arranged in the lens barrel, so as to form an optical lens of the camera module together with the lens barrel, the side where the first surface of the lens barrel is located is the light-incoming side of the optical lens, the side where the second surface of the lens barrel is located is the light-emitting side of the optical lens, the module circuit board is located on the light-emitting side of the lens barrel, and the module circuit board is arranged at a distance from the second surface of the lens barrel, and the photosensitive chip is arranged on the side of the module circuit board facing the lens barrel. The optical lens can receive light on the light-incoming side and emit light on the light-emitting side, and the photosensitive chip generates an image signal by collecting the light emitted by the optical lens, so that the camera module realizes the shooting function.

[0026] In a fifth aspect, the present application further provides an electronic device, which may include a housing, a camera decoration, and the camera module in the fourth aspect. The housing may be provided with an opening, the camera decoration is provided in the opening, and the camera decoration is provided with a light inlet, the first surface of the lens barrel is opposite to the light inlet, and the first surface of the lens barrel is at least partially exposed in the light inlet. Based on the frosted shape of the first surface of the lens barrel, the color presented by the lens barrel, the camera decoration, and the lens is basically the same, so the risk of the user observing the eccentricity of the lens barrel can be visually reduced, thereby improving the user's experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0028] Figure 2 for Figure 1 A partially exploded schematic diagram of the electronic device shown in ;

[0029] Figure 3 for Figure 1 A schematic diagram of a cross-sectional structure of an electronic device at AA shown in FIG.

[0030] Figure 4 A schematic diagram of the structure of an optical lens provided in an embodiment of the present application;

[0031] Figure 5 A schematic diagram of a partial structure of a lens barrel provided in an embodiment of the present application;

[0032] Figure 6 for Figure 5 Schematic diagram of the reflection process of light by the local structure of the lens barrel shown in;

[0033] Figure 7 A schematic diagram of a partial structure of another lens barrel provided in an embodiment of the present application;

[0034] Figure 8 for Figure 7 A schematic diagram of a partial cross-sectional structure of the lens barrel shown in ;

[0035] Fig. 9 for Figure 7 Schematic diagram of the reflection process of light by the local structure of the lens barrel shown in;

[0036] Fig.10 For laser engraving Figure 7 A schematic diagram of the process of the first side of the lens barrel shown in ;

[0037] Fig.11 For laser engraving Figure 7 A schematic diagram illustrating the path of the first side of the lens barrel shown in ;

[0038] Fig.12 A schematic diagram of a partial structure of a lens barrel provided in an embodiment of the present application;

[0039] Fig.13 for Fig.11 Schematic diagram of the reflection process of light by the local structure of the lens barrel shown in;

[0040] Fig.14 A schematic diagram of a partial structure of another lens barrel provided in an embodiment of the present application;

[0041] Fig.15 for Fig.14 Schematic diagram of the reflection process of light by the local structure of the lens barrel shown in;

[0042] Fig.16 For laser engraving Fig.14 Schematic diagram illustrating the path of the first surface of the lens barrel shown in FIG.

[0043] Reference numerals:

[0044] 1- Electronic equipment;

[0045] 100-housing; 110-middle frame; 120-back cover; 121-opening; 122-camera decoration; 1221-flange; 1222-light inlet;

[0046] 123- second cover plate;

[0047] 200-screen; 210-first cover plate; 220-display screen;

[0048] 300-host circuit board; 310-avoidance space;

[0049] 400-camera module; 410-optical lens; 410a-light inlet side; 410b-light outlet side; 411-lens barrel; 411a-first surface of the lens barrel;

[0050] 411b - the second surface of the lens barrel; 4111 - microstructure layer; 41111 / 41121 - protrusions; 41112 / 41122 - depressions; 41113 - particle structure;

[0051] 4112-groove; 4113-ring structure; 412-lens; 420-module circuit board; 430-photosensitive chip; 440-filter. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical scheme and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. However, the example implementation can be implemented in various forms and should not be construed as being limited to the implementations set forth herein. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted. The words expressing position and direction described in the embodiments of the present application are all illustrated by taking the accompanying drawings as examples, but changes may be made as needed, and the changes made are all included in the scope of protection of the present application. The drawings of the embodiments of the present application are only used to illustrate the relative position relationship and do not represent the true proportion.

[0053] It should be noted that specific details are described in the following description to facilitate understanding of the present application. However, the embodiments of the present application can be implemented in a variety of other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the embodiments of the present application. Therefore, the present application is not limited to the specific implementation methods disclosed below.

[0054] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 1 As shown, the electronic device 1 can be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a camera, a personal computer, a notebook computer, a vehicle-mounted device, a wearable device, augmented reality (AR) glasses, an AR helmet, virtual reality (VR) glasses or a VR helmet, or other devices with photo and video functions. Figure 1 The electronic device 1 of the illustrated embodiment is described by taking a mobile phone as an example.

[0055] Figure 2 for Figure 1 Please also refer to the partially exploded schematic diagram of the electronic device shown in Figure 1 and Figure 2 , the electronic device 1 may include a housing 100, a screen 200, a host circuit board 300 and a camera module 400. It should be noted that, Figure 1 , Figure 2 The following figures and the related drawings only schematically show some components of the electronic device 1, and the actual shapes, sizes, positions and structures of these components are not subject to Figure 1 , Figure 2 In addition, when the electronic device 1 is a device of other forms, the electronic device 1 may not include the screen 200 and the host circuit board 300 .

[0056] For ease of description, the width direction of the electronic device 1 is defined as the first direction (X axis), the length direction of the electronic device 1 is defined as the second direction (Y axis), and the thickness direction of the electronic device 1 is defined as the third direction (Z axis). It is understood that the coordinate system setting of the electronic device 1 can be flexibly set according to specific actual needs.

[0057] The housing 100 includes a middle frame 110 and a back cover 120. The back cover 120 is fixed to one side of the middle frame 110. In one embodiment, the back cover 120 is fixed to the middle frame 110 by adhesive. In another embodiment, the back cover 120 and the middle frame 110 form an integral structure, that is, the back cover 120 and the middle frame 110 are an integral structure.

[0058] Please refer again Figure 2 , the screen 200 is fixed to the other side of the middle frame 110. At this time, the screen 200 and the back cover 120 are arranged opposite to each other. The screen 200, the middle frame 110 and the back cover 120 together surround the interior of the electronic device 1. The interior of the electronic device 1 can be used to place components of the electronic device 1, such as a battery, a receiver, and a microphone.

[0059] In this embodiment, the screen 200 can be used to display images, text, etc. The screen 200 can be a flat screen or a curved screen. The screen 200 includes a first cover plate 210 and a display screen 220. The first cover plate 210 is stacked on the side of the display screen 220 away from the middle frame 110. The first cover plate 210 can be set close to the display screen 220, and can be mainly used to protect the display screen 220 and prevent dust. The material of the first cover plate 210 can be, but is not limited to, glass.

[0060] Figure 3 for Figure 1 A schematic diagram of a cross-sectional structure of an electronic device at AA is shown in FIG. Figure 2 and Figure 3 , the host circuit board 300 is fixed inside the electronic device 1. Specifically, the host circuit board 300 can be fixed to the side of the screen 200 facing the back cover 120. The host circuit board 300 can be used to set a chip, and the chip can be a central processing unit (CPU), a graphics processing unit (GPU), and a universal flash storage (UFS).

[0061] Please continue to refer to Figure 2 and Figure 3The camera module 400 is fixed inside the electronic device 1. Specifically, the camera module 400 is fixed to the side of the screen 200 facing the back cover 120. In addition, the host circuit board 300 is provided with an escape space 310. The shape of the escape space 310 is not limited to Figure 1 and Figure 2 The camera module 400 is located in the avoidance space 310. In this way, in the Z-axis direction, the camera module 400 and the host circuit board 300 have an overlapping area, thereby avoiding the problem of increasing the thickness of the electronic device 1 due to the camera module 400 being stacked on the host circuit board 300. Of course, in other embodiments, the host circuit board 300 may not be provided with the avoidance space 310. In this case, the camera module 400 may be stacked on the host circuit board 300, or spaced apart from the host circuit board 300.

[0062] In this embodiment, the camera module 400 is electrically connected to the host circuit board 300. Specifically, the camera module 400 is electrically connected to the CPU through the host circuit board 300. When the CPU receives the user's instruction, the CPU can send a signal to the camera module 400 through the host circuit board 300 to control the camera module 400 to capture images or record videos. In other embodiments, when the electronic device 1 is not provided with the host circuit board 300, the camera module 400 can also directly receive the user's instruction and capture images or record videos according to the user's instruction.

[0063] The camera module may include an optical lens 410, a module circuit board 420, and a photosensitive chip 430. The optical lens 410 includes a light-incoming side 410a and a light-emitting side 410b, and the optical lens 410 may receive light at the light-incoming side 410a and emit light at the light-emitting side 410b. The module circuit board 420 is fixed to the light-emitting side of the optical lens 410, that is, the module circuit board 420 is located on the image side of the optical lens 410. The module circuit board 420 may be electrically connected to the host circuit board 300 so that signals can be transmitted between the host circuit board 300 and the module circuit board 420. The photosensitive chip 430 is fixed to the side of the module circuit board 420 facing the optical lens 410. The photosensitive chip 430 is electrically connected to the module circuit board 420, so that after the photosensitive chip 430 collects light from the light-emitting side 410b of the optical lens 410, the photosensitive chip 430 can generate a signal according to the light, and transmit the signal to the host circuit board 300 via the module circuit board 420. Exemplarily, the photosensitive chip 430 can be an image sensor such as a complementary metal-oxide-semiconductor (CMOS) or a charge coupled device (CCD).

[0064] In addition, the camera module 400 may further include a filter 440, which is located on the side of the photosensitive chip 430 facing the optical lens 410. The filter 440 can be used to filter the stray light of the ambient light passing through the optical lens 410, and transmit the filtered ambient light to the photosensitive chip 430, thereby ensuring that the image captured by the electronic device has better clarity. The filter 440 can be, but is not limited to, a blue glass filter. For example, the filter 440 can also be a reflective infrared filter, or a double-pass filter (a double-pass filter can allow visible light and infrared light in ambient light to pass through at the same time, or allow visible light and other specific wavelengths of light (such as ultraviolet light) in ambient light to pass through at the same time, or allow infrared light and other specific wavelengths of light (such as ultraviolet light) to pass through at the same time).

[0065] Continue to refer Figure 3 , the back cover 120 is provided with an opening 121, and the opening 121 can connect the inside of the electronic device 1 with the outside of the electronic device 1. The electronic device 1 also includes a camera decoration 122 and a second cover plate 123. The camera decoration 122 is arranged in the opening 121, and the camera decoration 122 is fixedly connected to the back cover 120. Exemplarily, the camera decoration 122 can be fixed in the opening 121 by bonding or interference fit. In addition, in order to improve the connection reliability between the camera decoration 122 and the back cover 120, the end of the camera decoration 122 facing the inside of the electronic device may have a flange 1221, and the flange 1221 can be fixedly connected to the inner surface of the back cover 120. The camera decoration 122 is provided with a light inlet 1222, and the light inlet 1222 can also connect the inside of the electronic device 1 with the outside of the electronic device 1, and the light inlet 1222 can expose the light inlet side 410a of the optical lens 410 inside the electronic device. The second cover plate 123 is fixed in the light inlet 1222, thereby isolating the inside of the electronic device 1 from the outside of the electronic device 1, and reducing the external water or dust from entering the inside of the electronic device 1 through the light inlet. The second cover plate 123 is made of transparent material, such as glass or plastic.

[0066] Taking into account installation and manufacturing errors, the radial dimension of the light inlet hole 1222 is generally greater than the radial dimension of the light inlet side 410a of the optical lens 410, so that the light inlet side 410a of the optical lens 410 can be completely exposed in the light inlet hole 1222. In some embodiments, the edge area of ​​the second cover plate 123 can be coated with ink to shield other structures inside the electronic device 1 except the light inlet side 410a of the optical lens 410, thereby improving the appearance design of the electronic device 1. The inner area of ​​the second cover plate 123 is opposite to the light inlet side of the optical lens, and the inner area of ​​the second cover plate 123 can be formed as a light-transmitting area, so that the light inlet side 410a of the optical lens 410 can collect light entering the inside of the electronic device 1 from the light-transmitting area.

[0067] Figure 4 This is a schematic diagram of the structure of the optical lens provided in the embodiment of the present application. Figure 3 and Figure 4 As shown, in the embodiment of the present application, the optical lens 410 may include a lens barrel 411 and a lens 412 disposed in the lens barrel 411, wherein the number of the lens 412 may be one or more. In the case where there are multiple lenses 412, the multiple lenses 412 may be arranged in the lens barrel 411 along the axial direction of the lens barrel 411 at intervals. The axial direction of the lens barrel 411 may be arranged in a direction from the light-incoming side 410a of the optical lens 410 to the light-emitting side 410b thereof. On the light-incoming side 410a of the optical lens 410, the lens barrel 411 includes a first surface 411a disposed toward the light-incoming hole 1222 of the camera decorative part 122, and on the light-emitting side 410b of the optical lens 410, the lens barrel 411 includes a second surface 411b disposed toward the photosensitive chip 430. It is easy to understand that the cross-sectional shapes of the first surface 411a and the second surface 411b of the lens barrel 411 are both annular. The first surface 411a of the lens barrel 411 may be partially or completely exposed in the light-incoming hole 1222. It should be noted that when the edge of the second cover plate 123 is coated with ink, the first surface 411 a of the lens barrel 411 may be partially or completely exposed in the light-transmitting area on the inner side of the second cover plate 123 .

[0068] During the assembly of the whole device, due to limited assembly precision, the optical lens 410 often has an eccentricity problem, and the axis of the lens 412 and the axis of the lens barrel 411, and the axis of the lens barrel 411 and the axis of the light inlet 1222 may all be misaligned. Since there is a color difference between the lens barrel 411, the lens 412, and the camera decorative piece 122, if there is an eccentricity problem, the user can easily see it from the appearance of the electronic device, which reduces the user experience.

[0069] In response to the above problems, the embodiment of the present application reduces the light reflectivity of the first surface 411a of the lens barrel 411 by specially designing the lens barrel 411. After the ambient light enters the interior of the electronic device 1 through the light inlet 1222 and falls on the first surface 411a of the lens barrel 411, the low reflectivity characteristic of the first surface 411a of the lens barrel 411 can be used to consume and absorb the light inside the electronic device 1, so that the first surface 411a of the lens barrel 411 has a matte effect. In this way, from the appearance of the electronic device 1, the colors presented by the camera decoration 122, the lens barrel 411, and the lens 412 are basically the same, and even if an eccentricity problem occurs, it is not easy to be observed by the user, which is beneficial to improving the user experience.

[0070] Figure 5This is a schematic diagram of a partial structure of a lens barrel 411 provided in an embodiment of the present application, wherein the partial structure of the lens barrel 411 including the first surface 411a thereof is shown. Figure 5 As shown, in the embodiment of the present application, the first surface 411a of the lens barrel 411 includes a plurality of protrusions 41111, and the plurality of protrusions 41111 and the plurality of recesses 41112 are arranged along the horizontal direction of the microstructure layer 4111 (ie, Figure 5 The plurality of protrusions 41111 and the plurality of depressions make the first surface 411a of the lens barrel 411 present an uneven frosted shape.

[0071] In some embodiments, the heights of the plurality of protrusions 41111 may be different, or the heights of some protrusions 41111 may be the same, while the heights of other protrusions 41111 may be different. For example, the height of the protrusion 41111 may be greater than or equal to 0.5um and less than or equal to 10um. Similarly, the depths of the plurality of recesses 41112 may be different, or the depths of some recesses 41112 may be the same, while the depths of other recesses 41112 may be different. For example, the depth of the recess 41112 may be greater than or equal to 0.5um and less than or equal to 10um.

[0072] In some embodiments, the radial dimensions of the plurality of protrusions 41111 along the horizontal direction may be different, or the radial dimensions of some of the protrusions 41111 may be the same, and the radial dimensions of other protrusions 41111 may be different. Exemplarily, the radial dimension of the protrusion 41111 may be greater than or equal to 0.5um and less than or equal to 10um. Similarly, the radial dimensions of the plurality of recesses 41112 along the horizontal direction may be different, or the radial dimensions of some of the recesses 41112 may be the same, and the radial dimensions of other recesses 41112 may be different. Exemplarily, the radial dimension of the recess 41112 may be greater than or equal to 0.5um and less than or equal to 10um. By designing the dimensions of the protrusions and recesses to be within this size range, the frosted lens barrel surface formed can achieve a better diffuse reflection effect on light.

[0073] In some embodiments, the shapes of the plurality of protrusions 41111 may be different from each other, or the shapes of some protrusions 41111 may be the same, and the shapes of other protrusions 41111 may be different from each other. In addition, the protrusions 41111 may be a symmetrical structure or an asymmetrical structure. Exemplarily, the cross-sectional shape of the protrusions 41111 may be an arc, a triangle, a trapezoid, and various regular or irregular polygons. Similarly, the shapes of the plurality of recesses 41112 may be different from each other, or the shapes of some recesses 41112 may be the same, and the shapes of other recesses 41112 may be different from each other. In addition, the recesses 41112 may be a symmetrical structure or an asymmetrical structure. Exemplarily, the cross-sectional shape of the recesses 41112 may be an arc, a triangle, a trapezoid, and various regular or irregular polygons.

[0074] Figure 6 for Figure 5 Schematic diagram of the reflection process of light by the local structure of the lens barrel 411 shown in FIG. Figure 6 As shown, after the light entering the electronic device through the light inlet hits the first surface 411a of the lens barrel 411, the protrusion 41111 and the recess 41112 structure can make the light reflect in all directions, that is, the light is diffusely reflected, and most of the reflected light will be reflected again on the first surface 411a of the lens barrel 411, and only a small part of the light will be directed to other structures inside the electronic device or reflected out of the electronic device through the light inlet. Since there is a certain loss in each reflection process of the light, the light will be weakened after each reflection, so after multiple reflections, the light will gradually dissipate on the surface of the lens barrel 411. That is to say, most of the light irradiated from the light inlet to the first surface 411a of the lens barrel 411 will be consumed, thereby greatly reducing the light reflectivity of the first surface 411a of the lens barrel 411, making the first surface 411a of the lens barrel 411 present a matte effect, so that the color presented by the lens barrel 411, the camera decorative part and the lens is basically the same, and it is difficult for the user to see the relative positions of the three when observing from the light inlet to the inside of the electronic device, so it is not easy to see whether there is an eccentricity problem, so that the user's experience is improved. It has been verified that by setting the above-mentioned protrusions 41111 and depressions 41112 on the first surface 411a of the lens barrel 411, the light reflectivity of the first surface 411a of the lens barrel 411 can be reduced to less than 3%.

[0075] In addition, the lens barrel 411 may be made of a material with light absorption effect, so that in addition to the light loss itself during the reflection process, a part of the light can be absorbed by the lens barrel 411 , thereby further reducing the light reflectivity of the first surface 411 a of the lens barrel 411 .

[0076] In the embodiment of the present application, the first surface 411a of the lens barrel 411 can be formed by a variety of processes. For example, in some embodiments, during the overall injection molding of the lens barrel 411, the molding surface of the first surface 411a used to mold the lens barrel 411 in the injection mold can be specially designed to show an uneven frosted form, and then the first surface 411a of the lens barrel 411 is molded using the molding surface. It is easy to understand that the first surface 411a of the lens barrel 411 molded by the injection mold is a complementary relationship with the molding surface of the mold, that is, the protrusion of the first surface 411a of the lens barrel 411 is formed by the depression of the molding surface, and the depression of the first surface 411a of the lens barrel 411 is formed by the protrusion in the molding surface. Wherein, the molding surface of the mold can be processed using an ultra-precision machining method, such as electric spark, sandblasting, chemical treatment, etc.

[0077] In another injection molding method, a mold sheet with a frosted surface can be pre-processed, and then the mold sheet is inserted into the injection mold, and the frosted surface of the mold sheet is used as the molding surface to form the first surface of the lens barrel 411 by injection molding. Similarly, the first surface 411a of the lens barrel 411 formed by the mold sheet is also complementary to the surface of the mold sheet. The surface of the mold sheet can be processed by ultra-precision processing methods such as electrospark machining, sandblasting, and chemical treatment, or by laser direct writing, laser surface treatment, etc.

[0078] In addition to the above-mentioned injection molding method, the embodiment of the present application can also form the above-mentioned features of the protrusion 41111 and the depression 41112 on the first surface 411a of the lens barrel 411 by nanoimprinting, plasma etching, sandblasting, chemical treatment, etc. on the formed lens barrel 411.

[0079] Among them, nano-imprinting can use a structure with a frosted surface as a mold, use the imprinting glue as a carrier for pattern transfer, press the mold onto the imprinting glue, and then solidify the imprinting glue to retain the frosted morphology of the imprinting glue surface. The imprinting glue can be used as the microstructure layer 4111 of the first surface 411a of the lens barrel 411.

[0080] Plasma etching is performed by placing the lens barrel 411 in an etching gas, using a mask structure to shield the surfaces of the lens barrel 411 except the first surface 411a and a local area of ​​the first surface 411a of the lens barrel 411 during the etching process, and then etching the portion of the first surface 411a of the lens barrel 411 exposed outside the mask structure. Since there is a certain difference in material density at different positions of the lens barrel 411, different positions will have different etching speeds for the portion of the lens barrel 411 exposed outside the mask structure, and this speed difference is used to form an uneven frosted shape on the first surface 411a of the lens barrel 411.

[0081] Similarly, the chemical treatment is to place the lens barrel 411 in a corrosive solution, and during the reaction process, use a mask structure to block other surfaces of the lens barrel 411 except the first surface 411a, as well as a local area of ​​the first surface 411a of the lens barrel 411, and then etch the portion of the first surface 411a of the lens barrel 411 exposed outside the mask structure, so that the first surface 411a of the lens barrel 411 forms an uneven frosted shape.

[0082] Sand blasting is the process of using particles of a target size to spray at high speed onto the first surface 411a of the lens barrel 411, so as to remove part of the material on the first surface 411a of the lens barrel 411 through physical impact of the particles, so that the first surface 411a of the lens barrel 411 forms an uneven frosted shape, wherein the particles used for sand blasting include but are not limited to aluminum oxide, silicon dioxide, etc.

[0083] The above-mentioned molding methods all have the advantages of low cost and simple process, so that the lens barrel 411 can achieve the low reflectivity characteristic of the first surface 411 a at a relatively low cost.

[0084] Figure 7 This is a schematic diagram of a partial structure of another lens barrel 411 provided in an embodiment of the present application, wherein the partial structure of the lens barrel 411 including the first surface 411a thereof is shown. Figure 8 for Figure 7 The partial cross-sectional structure diagram of the lens barrel 411 is shown in FIG. Figure 7 and Figure 8 As shown, in the embodiment of the present application, the first surface 411a of the lens barrel 411 includes a plurality of grooves 4112 arranged in an array, and the inner wall of each groove 4112 may include a plurality of protrusions 41121, and the plurality of protrusions 41121 are densely arranged in a disordered state, and a depression 41122 may be formed between two adjacent protrusions 41121. In this way, the structure of the plurality of protrusions 41121 and the plurality of depressions 41122 can make the inner wall surface of the groove 4112 present an uneven frosted morphology, and the plurality of grooves 4112 with frosted inner walls can make the first surface 411a of the lens barrel 411 present a frosted morphology as a whole. Among them, the groove 4112 can be a micron-level structure, and the protrusion 41121 and the depression 41122 can be a nano-level structure.

[0085] In some embodiments, a plurality of grooves 4112 may be arranged into a plurality of annular structures 4113 along the circumference of the lens barrel 411. The plurality of annular structures 4113 may be coaxially arranged, and their common axis may be the axis of the lens barrel 411. Wherein, along the radial direction of the lens barrel 411, the spacing between any two adjacent annular structures 4113 may be equal. In addition, along the circumference of the lens barrel 411, the spacing between the centers of any two adjacent grooves 4112 in each annular structure 4113 may also be equal.

[0086] Fig. 9 for Figure 7 Schematic diagram of the reflection process of light by the local structure of the lens barrel 411 shown in FIG. Fig. 9 As shown, after the light entering the electronic device through the light inlet hits the first surface 411a of the lens barrel 411, the groove 4112 and the protrusions 41121 and the depressions 41122 in the groove 4112 can cause the light to be diffusely reflected, wherein most of the reflected light will be reflected again on the first surface 411a of the lens barrel 411, and only a small part of the light will be directed to other structures inside the electronic device or reflected out of the electronic device through the light inlet. Since there is a certain loss in each reflection process of the light, the light will be weakened after each reflection, so that after multiple reflections, the light will gradually dissipate on the surface of the lens barrel 411. Therefore, most of the light irradiated from the light inlet to the first surface 411a of the lens barrel 411 will be consumed by the protrusions 41121 and the depressions 41122 in the grooves 4112, thereby greatly reducing the light reflectivity of the first surface 411a of the lens barrel 411, making the first surface 411a of the lens barrel 411 present a matte effect, so that the color presented by the lens barrel 411 is basically the same as that of the camera decorative parts and the lens, and it is not easy for the user to see whether there is an eccentricity problem when observing the inside of the electronic device from the light inlet, so the user's experience is improved. It has been verified that by providing the above-mentioned multiple grooves 4112 on the first surface 411a of the lens barrel 411, and forming multiple nano-scale protrusions 41121 and depressions 41122 structures on the inner wall of each groove 4112, the light reflectivity of the first surface 411a of the lens barrel 411 can be reduced to less than 3%.

[0087] In addition, the lens barrel 411 may be made of a material with light absorption effect, so that in addition to the light loss itself during the reflection process, a part of the light can be absorbed by the lens barrel 411 , thereby further reducing the light reflectivity of the first surface 411 a of the lens barrel 411 .

[0088] In the embodiment of the present application, the morphology of the first surface 411a of the lens barrel 411 can be formed by laser laser engraving technology and pulsed laser reciprocating scanning. The laser equipment used in the processing process includes a laser, a beam scanning system and a tool. Among them, the laser can use an external gate mode, the power of the laser is ≤100w, and the maximum repetition frequency is ≥1MHz; the beam scanning system includes a two-position scanning galvanometer and supporting optical elements such as reflection, beam expansion, and collimation, and the maximum scanning speed of the galvanometer at the focal plane of the galvanometer is ≥3m / s; the tool is used to carry the lens barrel 411 to be processed, and the lens barrel 411 can be loaded on the tool manually or loaded on the tool by automatic loading and unloading equipment (such as a robot arm, etc.), and the tool can be fixed near the focal plane of the laser beam, so that after the lens barrel 411 is loaded on the tool, the surface of the lens barrel 411 is in the focal plane of the laser beam. In addition, the lens barrel 411 can be processed using a multi-station platform such as a turntable or assembly line to improve production efficiency.

[0089] In some other embodiments, the light beam scanning system may also realize fixed light emission of the laser beam based on an objective lens, and the two-dimensional / three-dimensional translation stage carries the lens barrel 411 to move, thereby realizing scanning of the light beam on the surface of the lens barrel 411 .

[0090] Among them, the wavelength of the laser can be selected from any one of 10.6um, 1064 / 1030nm (infrared light), 532 / 525nm (green light), and 355 / 343nm (ultraviolet light); the frequency of the laser can be between 10w and 100w, so that the laser power density on the surface of the lens barrel 411 is greater than the melting threshold of the lens barrel 411 material, so that when the laser beam hits the lens barrel 411, a groove 4112 can be formed on the surface of the lens barrel 411, so that the first surface 411a of the lens barrel 411 finally formed presents an uneven frosted shape.

[0091] Fig.10 For laser engraving Figure 7 The process diagram of the first surface 411a of the lens barrel 411 shown in FIG. Fig.11 For laser engraving Figure 7 The path diagram of the first surface 411a of the lens barrel 411 shown in FIG. Fig.10 and Fig.11 As shown, as mentioned above, the grooves of the first surface 411a of the lens barrel 411 are arranged in an array, wherein the array can be regarded as being composed of a plurality of lines arranged in a certain pattern, and the position of each line can be regarded as a laser engraving path in the laser engraving process. Fig.10In the illustrated embodiment, the locations of the multiple annular lines can be used as multiple laser engraving paths. By designing the laser engraving path to be annular, the laser engraving path can match the approximately cylindrical appearance of the lens barrel 411, thereby simplifying the difficulty of path planning, and further helping to simplify the manufacturing process of the lens barrel 411. During the processing, firstly, multiple laser engraving paths are determined on the surface of the lens barrel 411, and then by controlling the laser equipment, the laser spot emitted by the laser is scanned at a preset scanning speed v1 on each laser engraving path, and the number of scans for each laser engraving path can be 1 to 3 times.

[0092] When the laser spot scans on the lens barrel 411, the position on the surface of the lens barrel 411 where the laser spot is scanned will be reduced by the ultrafast laser, thereby forming a groove at the scanning position of the laser spot. In addition, under the irradiation of the laser, heat will accumulate in the formed groove, and this heat will further cause the inner wall of the groove to reduce material, thereby forming a plurality of protrusions and a plurality of depressions arranged in disorder on the inner wall of the groove.

[0093] For reference Figures 9 to 11 As shown, the diameter of the laser spot is defined as D1. In this embodiment, the scanning speed v1 of the laser satisfies: v1<D1 / (2*f1), where f1 is the repetition frequency of the laser pulse. It is easy to understand that the diameter D1 of the laser spot is equivalent to or slightly smaller than the diameter d of the groove. Depending on the selected laser wavelength, the diameter D1 of the laser spot can be between 2um and 40um. Therefore, the diameter d of the formed groove 4112 is greater than or equal to 2um and less than or equal to 40um.

[0094] The spacing L1 between two adjacent laser engraving paths is also substantially equal to the spacing l between two adjacent annular structures, and the spacing L1 between two adjacent laser engraving paths can satisfy: D1 / 2≤L1≤D1. Therefore, the spacing l between two adjacent annular structures 4113 and the diameter d of the groove 4112 satisfy: d / 2≤l≤d, so that the edges of the grooves 4112 of the two adjacent annular structures 4113 can at least partially overlap, thereby increasing the coverage area of ​​the grooves 4112 on the first surface of the lens barrel 411, and using the uneven inner wall of the grooves 4112 to reduce the light reflectivity of the first surface of the lens barrel 411.

[0095] In addition, along the circumference of the lens barrel 411, the spacing s between the centers of two adjacent grooves 4112 in each annular structure 4113 and the diameter d of the groove 4112 satisfy: s≤d / 2. Similarly, this design dimension design can make adjacent grooves 4112 overlap each other, and from a macroscopic point of view, multiple grooves 4112 of the annular structure 4113 are sequentially connected to form a continuous annular groove, thereby helping to further increase the coverage area of ​​the grooves 4112 on the first surface of the lens barrel 411, and using the uneven inner wall of the groove 4112 to reduce the light reflectivity of the first surface of the lens barrel 411.

[0096] Fig.12 This is a schematic diagram of a partial structure of another lens barrel 411 provided in an embodiment of the present application, wherein the partial structure of the lens barrel 411 including the first surface 411a thereof is shown. Fig.12 As shown, in the embodiment of the present application, the first surface 411a of the lens barrel 411 includes a microstructure layer 4111, and the microstructure layer 4111 includes a plurality of nano-scale particle structures 41113. These particle structures 41113 can be arranged along the horizontal direction (i.e., Fig.12 The distribution can also be distributed along the thickness direction of the microstructure layer 4111 (i.e., the x direction shown in FIG. 4 ). Fig.12 The particle structures 41113 are arranged in a disordered state in the horizontal direction and the thickness direction of the microstructure layer 4111, so that the first surface 411a of the lens barrel 411 has microscopic roughness and presents an uneven frosted shape.

[0097] Among them, the multiple particle structures 41113 in the microstructure layer 4111 can be arranged in contact, or can be separated by other substances in the microstructure layer 4111. The shapes of the multiple particle structures 41113 can be different, or some of the particle structures 41113 can have the same shape, and the shapes of other particle structures 41113 can be different. In addition, the particle structure 41113 can be a symmetrical structure or an asymmetrical structure. Exemplarily, the shape of the particle structure 41113 can be spherical, cylindrical, and various regular or irregular polyhedral shapes.

[0098] Fig.13 for Fig.12 Schematic diagram of the reflection process of light by the local structure of the lens barrel 411 shown in FIG. Fig.13As shown, after the light entering the electronic device from the light inlet is irradiated to the first surface 411a of the lens barrel 411, the particle structure 41113 in the microstructure layer 4111 can make the light diffusely reflected, wherein most of the reflected light will be reflected again on the first surface 411a of the lens barrel 411, and only a small part of the light will be directed to other structures inside the electronic device or reflected out of the electronic device through the light inlet. Since there is a certain loss of light in each reflection process, the light will be weakened after each reflection, so that after multiple reflections, the light will gradually dissipate on the surface of the lens barrel 411. Therefore, most of the light irradiated from the light inlet to the first surface 411a of the lens barrel 411 will be consumed by the microstructure layer 4111, thereby greatly reducing the light reflectivity of the first surface 411a of the lens barrel 411, so that the first surface 411a of the lens barrel 411 presents a matte effect, so that the color presented by the lens barrel 411 is basically the same as that presented by the camera decorative parts and the lens, and it is not easy for the user to see whether there is an eccentricity problem when observing from the light inlet to the inside of the electronic device, so the user's experience is improved. It has been verified that by providing the above-mentioned particle structure 41113 on the first surface 411a of the lens barrel 411, the light reflectivity of the first surface 411a of the lens barrel 411 can be reduced to less than 3%.

[0099] In addition, the lens barrel 411 may be made of a material with light absorption effect, so that in addition to the light loss itself during the reflection process, a part of the light can be absorbed by the lens barrel 411 , thereby further reducing the light reflectivity of the first surface 411 a of the lens barrel 411 .

[0100] In some embodiments, the microstructure layer 4111 may be an ink layer. The components of the ink layer may include solvents, resins, pigments and additives, wherein the pigment is the main component in the ink layer for reducing the reflectivity, and it exists in the ink layer in the form of tiny particles, so the pigment particles are the above-mentioned particle structure 41113. In this embodiment, the proportions of resin, pigment and additives in the ink used to form the ink layer may be 75-97%, 2-20% and 1-5%, respectively. Among them, the resin may be any one of epoxy resin, acrylic resin, polyurethane resin and polyester resin. The pigment may be a mixture of one or more substances such as carbon black, carbon nanotubes, graphite and graphene. The purpose of the additive is to promote the ink to achieve better molding coating, improve the leveling of the ink and reduce the viscosity of the ink. The additive includes a leveling agent, a defoaming agent, a surfactant and the like. The solvent may be a mixture of one or more substances such as water, alcohols, ketones or benzene.

[0101] In addition, the ink layer can be formed by printing, spraying or inkjet printing, and the thickness of the ink layer can be greater than or equal to 1 um and less than or equal to 100 um.

[0102] For reference Fig.14 and Fig.15 As shown, Fig.14 This is a partial structural diagram of another lens barrel 411 provided in an embodiment of the present application. Fig.15 for Fig.14 The schematic diagram of the reflection process of the local structure of the lens barrel 411 shown in FIG. Fig.14 FIG. 4 shows a partial structure of the lens barrel 411 including the first surface 411a thereof. In this embodiment, the first surface 411a of the lens barrel 411 may also include a microstructure layer 4111. The microstructure layer 4111 and the Fig.12 The structures of the embodiments shown are basically the same, and the reflection process of the light by the first surface 411a of the lens barrel 411 is also similar to the above embodiments, which will not be repeated here. Fig.12 What is different from the illustrated embodiment is that the microstructure layer 4111 in this embodiment may be a carbonized layer, for example, a photo-induced carbonized layer obtained by laser subtractive carbonization treatment of the surface of the lens barrel 411 . In this case, the carbonized particles in the carbonized layer are the above-mentioned particle structure 41113 .

[0103] In some embodiments, the carbonized layer can be formed by carbonizing the surface of the lens barrel 411 through a laser engraving process to form the first surface 411a. The laser equipment used in the laser engraving process can refer to Figure 7 The laser device in the embodiment shown is configured, and the details will not be repeated here.

[0104] In this embodiment, short pulse or ultrashort pulse laser can be used in the carbonization layer processing process, and the wavelength can be selected from any one of 1064 / 1030nm (infrared light), 532 / 525nm (green light), and 355 / 343nm (ultraviolet light), among which the ultraviolet light can be selected from any one of nanosecond, picosecond, and femtosecond pulse widths, and the infrared light and green light can be selected from any one of picosecond and femtosecond pulse widths; the frequency of the laser can be between 10w and 100w, so that the laser power density on the surface of the lens barrel 411 is greater than the ablation threshold of the lens barrel 411 material.

[0105] Fig.16 For laser engraving Fig.14 Schematic diagram for explaining the path of the first surface 411a of the lens barrel 411 shown in FIG. Fig.16As shown, during the processing, firstly, a plurality of laser engraving paths are designed on the surface of the lens barrel, and the plurality of laser engraving paths can be arranged in an array. For example, the plurality of laser engraving paths can be coaxially arranged annular lines, and their common axis can be the axis of the lens barrel. Along the radial direction of the lens barrel, the spacing L2 between any two adjacent laser engraving paths can be equal. During the processing, by controlling the laser equipment, the laser spot emitted by the laser is scanned at a preset scanning speed v2 on each laser engraving path, and the number of scans for each laser engraving path can be 1 to 3 times.

[0106] When the laser spot scans the surface of the lens barrel, the material on the surface of the lens barrel is carbonized under the action of the extremely high local temperature and forms granular substances. These granular substances are the above-mentioned carbonized particles.

[0107] The diameter of the laser spot is defined as D2, and the spacing L2 between two adjacent laser engraving paths can satisfy: L2<1 / 10*D2. The scanning speed v2 of the laser satisfies: v2<D2 / (10*f1), where f2 is the repetition frequency of the laser pulse.

[0108] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A lens barrel, characterized in that: The lens barrel includes a first surface, the first surface of the lens barrel includes a plurality of grooves arranged in an array, the inner wall of each of the grooves includes a plurality of protrusions, the grooves are micrometer-level structures, the plurality of protrusions are nanometer-level structures, the plurality of protrusions are arranged in a disordered state on the inner wall of the groove, and the distance between two adjacent protrusions is greater than or equal to 50nm and less than or equal to 300nm.

2. The lens barrel according to claim 1, characterized in that: The diameter of the groove is greater than or equal to 20 um and less than or equal to 40 um.

3. The lens barrel according to claim 1 or 2, characterized in that: The plurality of grooves are arranged along the circumference of the lens barrel to form a plurality of annular structures. The plurality of annular structures are coaxially arranged, and the spacing between any two adjacent annular structures is the same.

4. The lens barrel according to claim 3, characterized in that: The interval l between two adjacent annular structures and the diameter d of the groove satisfy: d / 2≤l≤d.

5. The lens barrel according to any one of claims 1 to 4, characterized in that: The distance s between the centers of two adjacent grooves and the diameter d of the grooves satisfy: s≤d / 2.

6. A lens barrel, characterized in that: The lens barrel comprises a first surface, the first surface of the lens barrel comprises a plurality of protrusions, the plurality of protrusions are arranged in a disordered state on the first surface, and a distance between two adjacent protrusions is greater than or equal to 0.5 um and less than or equal to 10 um.

7. The lens barrel according to claim 6, characterized in that: The height of the protrusion is greater than or equal to 0.5 um and less than or equal to 10 um.

8. The lens barrel according to claim 6 or 7, characterized in that: The heights of the plurality of protrusions are different, or, among the plurality of protrusions, some of the protrusions have the same height, and the heights of the other part of the protrusions are different.

9. The lens barrel according to any one of claims 6 to 8, characterized in that: The radial dimensions of the plurality of protrusions along the horizontal direction of the microstructure layer are different, or, some of the plurality of protrusions have the same radial dimensions along the horizontal direction of the microstructure layer, while other parts of the protrusions have different radial dimensions along the horizontal direction of the microstructure layer.

10. A lens barrel, characterized in that: The lens barrel includes a first surface, the first surface of the lens barrel includes a microstructure layer, the microstructure layer includes a plurality of particle structures, the plurality of particle structures are nanoscale structures, the plurality of particle structures are arranged in a disordered state in the horizontal direction of the microstructure layer, and the plurality of particle structures are arranged in a disordered state in the thickness direction of the microstructure layer.

11. The lens barrel according to claim 10, characterized in that: The shapes of the plurality of particle structures are different; or, some of the plurality of particle structures have the same shape, and other portions of the plurality of particle structures have different shapes.

12. The lens barrel according to claim 10 or 11, characterized in that: The microstructure layer is an ink layer, and the components of the ink layer include solvents, resins, pigments and additives, wherein the resins, pigments and additives account for 75-97%, 2-20% and 1-5% of the ink layer respectively, and the particles of the pigments are the particle structure.

13. The lens barrel according to claim 12, characterized in that: The thickness of the ink layer is greater than or equal to 1 um and less than or equal to 100 um.

14. The lens barrel according to claim 12 or 13, characterized in that: The solvent is a mixture of one or more of water, alcohols, ketones or benzene; the resin is any one of epoxy resin, acrylic resin, polyurethane resin and polyester resin; the pigment is a mixture of one or more of carbon black, carbon nanotubes, graphite and graphene; the auxiliary agent is any one of leveling agent, defoaming agent and surfactant.

15. The lens barrel according to claim 10 or 11, characterized in that: The microstructure layer is a carbonized layer, and the carbonized particles in the carbonized layer are the particle structure.

16. The lens barrel according to any one of claims 1 to 15, characterized in that: The lens barrel is made of light-absorbing material.

17. A camera module, characterized in that: The lens barrel comprises a module circuit board, a photosensitive chip, a lens, and the lens barrel according to any one of claims 1 to 16, wherein the lens barrel comprises a second surface, and the second surface of the lens barrel is arranged opposite to the first surface of the lens barrel; The lens is arranged in the lens barrel; The module circuit board is spaced apart from the second surface of the lens barrel, and the photosensitive chip is arranged on a surface of the module circuit board facing the lens barrel.

18. An electronic device, characterized in that: It includes a shell, a camera decoration and a camera module as claimed in claim 17, wherein the shell is provided with an opening; the camera decoration is arranged in the opening, and the camera decoration is provided with a light inlet; the first surface of the lens barrel is opposite to the light inlet, and the first surface of the lens barrel is at least partially exposed in the light inlet.

Images