A coating method and device for blackening non-effective diameter of a resin lens in a mobile phone camera

Abstract

The application discloses a kind of film coating method and device of resin lens non-effective diameter blackening in mobile phone camera, belong to film coating technical field, including the following steps: take the resin lens of mobile phone camera needing to be coated, place in ultrasonic cleaning device, add cleaning agent to device, improve the temperature in device;The application is coated by using rotation centrifugal force to resin lens, compared with the traditional method of coating film on resin lens by ion bombardment coating film liquid, with lower cost, and the instrument needed to be used is relatively simple, can effectively reduce the cost of method, at the same time, the film coating is carried out by the way of centrifugal force diffusion coating film liquid, can effectively guarantee the uniformity of coating film liquid distribution on the surface of resin lens, reduce the coating cost under the premise of guaranteeing coating effect, at the same time, the thickness after coating is controlled step by step multiple times, can effectively control the thickness of coating.

Description

Technical Field

[0001] This invention belongs to the field of coating technology, and particularly relates to a method and apparatus for blackening the non-effective diameter of resin lenses in mobile phone cameras. Background Technology

[0002] With the rapid development of technology, electronic products are developing at an unprecedented pace. Among them, mobile phones are an indispensable item in people's daily lives. Mobile phones can be used for communication, bringing people closer together. Nowadays, some smartphones are no longer limited to communication functions, but often also have entertainment functions. Mobile phones have a wide variety of accessories, among which the camera is the basic structure of the mobile phone's photography function. In order to improve the quality and shooting effect of the mobile phone camera, its resin lens needs to be coated.

[0003] Chinese patent disclosure (CN201910687897.2) discloses a method for blackening the non-effective diameter of resin lenses in mobile phone cameras. This method can improve the flare phenomenon caused by light transmission and reflection in the non-effective diameter area of ​​resin lenses in mobile phone cameras, improve the imaging quality of mobile phone cameras, enhance the competitiveness of lenses, and is suitable for mass production. However, this prior art coating method does not improve the coating effect in the specific coating steps, and cannot reduce the overall coating cost. At the same time, it does not have a detection step after coating, which reduces the application effect of the overall method and requires certain improvements.

[0004] In view of this, this application proposes a method and apparatus for blackening the non-effective diameter of resin lenses in mobile phone cameras, in order to solve the technical problems existing in the prior art. Summary of the Invention

[0005] The purpose of this invention is to address the problems that traditional coating methods do not have a method designed to greatly improve the coating effect in specific coating steps, cannot reduce the overall coating cost, and do not have a post-coating inspection step, thus reducing the overall application effect of the method. Therefore, this invention proposes a coating method and apparatus for blackening the non-effective diameter of resin lenses in mobile phone cameras.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a method for blackening the non-effective diameter of a resin lens in a mobile phone camera, comprising the following steps:

[0007] S1. Take the mobile phone camera resin lens that needs to be coated, place it in the ultrasonic cleaning device, add cleaning agent into the device, raise the temperature inside the device, and perform ultrasonic cleaning treatment on the resin lens for a period of time.

[0008] S2. Take out the cleaned resin lens and place it in the drying device. Increase the temperature inside the device and introduce gas to air dry the resin lens for a certain period of time.

[0009] S3. Take out the dried resin lens and place it on the polishing device. Keep the polishing device at a certain speed to perform external polishing on the resin lens.

[0010] S4. Activate the dust collection structure to effectively adsorb the powder generated during the polishing process;

[0011] S5. After polishing, place the resin lens on the coating device and use the shielding structure to shield specific parts of the resin lens.

[0012] S6. Place the resin lens in the heating device and heat it to a certain temperature, then maintain the temperature for a period of time.

[0013] S7. Using clamps, remove the heat-insulating resin lens and place it back on the coating device for fixation.

[0014] S8. Add the coating solution with a certain temperature to the center of the resin lens.

[0015] S9. Drive the resin lens to rotate rapidly at a certain speed. The coating liquid on the surface of the resin lens will spread on the surface of the resin lens due to the centrifugal force, and spread to the unblocked area of ​​the resin lens.

[0016] S10. After a period of time, gradually reduce the rotation speed of the resin lens at a certain rate until it stops rotating.

[0017] S11. The coating liquid, which is uniformly attached to the surface of the resin lens, cools and solidifies.

[0018] S12. Place the coated resin lens on the polishing device and control the coating thickness multiple times to achieve the required thickness.

[0019] S13. Place the polished coated resin lens in acid and alkali solutions of a certain concentration respectively, immerse them for a period of time, and observe the condition of the coated surface.

[0020] S14. After passing the test, collect and package the resin lenses.

[0021] As a further description of the above technical solution:

[0022] In step S1, the resin lens of the mobile phone camera that needs to be coated is taken and placed in an ultrasonic cleaning device. A cleaning agent is added to the device, and the temperature inside the device is raised to 40-60°C. The resin lens is then subjected to ultrasonic cleaning for 25-35 minutes.

[0023] As a further description of the above technical solution:

[0024] In step S2, the cleaned resin lens is taken out and placed in a drying device. The temperature inside the device is raised to 70-80°C, and argon gas is introduced to air dry the resin lens for 15-25 minutes.

[0025] As a further description of the above technical solution:

[0026] In step S3, the dried resin lens is taken out and placed on the polishing device, which is then kept at a speed of 1000-1200 r / min to perform external polishing on the resin lens.

[0027] As a further description of the above technical solution:

[0028] In step S5, after polishing, the resin lens is placed on the coating device. The effective diameter of the resin lens is blocked by the shielding structure, while the non-effective diameter is exposed. At the same time, the outer periphery of the resin lens is shielded by the shielding structure. The shielding structure can be one or more of aluminum foil and thin copper sheet.

[0029] As a further description of the above technical solution:

[0030] In step S6, the resin lens is placed in a heating device and heated to 70-90°C, and maintained for 10-20 minutes.

[0031] As a further description of the above technical solution:

[0032] In step S8, a coating solution at 150-230°C is dropped onto the center of the resin lens. The coating solution is a mixture of graphene oxide and epoxy resin.

[0033] As a further description of the above technical solution:

[0034] In step S9, the resin lens is driven to rotate rapidly at a speed of 2800-3200 r / min. Due to the centrifugal force, the coating liquid on the surface of the resin lens will spread on the surface of the resin lens and spread to the unobstructed area on the resin lens.

[0035] As a further description of the above technical solution:

[0036] In step S10, after 15-25 minutes, the rotation speed of the resin lens is gradually reduced at a rate of 400 r / min until it stops rotating. In step S12, the coated resin lens is placed on a polishing device, and the thickness of the coating is controlled in 3-5 steps to achieve a thickness of 1-2 mm. In step S13, the polished coated resin lens is immersed in acidic and alkaline solutions with a concentration of 5-8% for 20-24 hours respectively. The surface condition of the coating is observed. If the coating surface is good, the gloss does not change, and there is no decomposition, the coating is successful. Otherwise, the surface coating fails.

[0037] This invention also discloses a coating device for blackening the non-effective diameter resin lens in a mobile phone camera, comprising a coating liquid tank and a base. A worktable is fixedly installed on the top of the base. A sliding inclined plate is fixedly installed inside the worktable. An outer recovery cover, a recovery pump, and a mounting back plate are fixedly installed on the top of the worktable. Several recovery holes are opened on the top surface of the worktable inside the outer recovery cover. A coating liquid tank is fixedly installed on the side wall of the mounting back plate. A telescopic coating liquid head is fixedly installed on the bottom of the coating liquid tank. A guide pipe and a suction pipe are fixedly installed on the top and side wall of the recovery pump, respectively. One end of the guide pipe is fixedly connected to the bottom surface of the coating liquid tank, and one end of the suction pipe is located inside the worktable. A drive motor is fixedly installed inside the base through a mounting bracket. A mounting spindle is fixedly installed on one end of the output shaft of the drive motor.

[0038] As a further description of the above technical solution:

[0039] A lens mounting assembly is fixedly mounted on the top of the mounting spindle. The telescopic coating liquid head is located directly above the lens mounting assembly. The lens mounting assembly consists of a lens mounting plate and a side shielding and locking assembly. The lens mounting plate has a mounting groove inside. The side shielding and locking assembly is located inside the lens mounting plate. The side shielding and locking assembly consists of a shielding chuck, a top protrusion, and an outer top spring. One end of the outer top spring is fixedly mounted with the shielding chuck, and the other end of the outer top spring is fixedly connected to the inner wall of the lens mounting plate. A top protrusion is fixedly mounted on the top surface of the shielding chuck. A shielding and locking groove is opened on one side of the shielding chuck. An inner conical inclined surface is provided on the inner wall of the outer recovery cover. An electric heating tube is longitudinally fixedly mounted inside the shell cavity of the outer recovery cover.

[0040] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0041] 1. In this invention, a coating process is performed on resin lenses using centrifugal force. Compared to traditional methods that use ionization bombardment of coating solutions, this method is less expensive and requires simpler equipment, effectively reducing costs. Furthermore, the centrifugal force diffusion of the coating solution ensures uniform distribution on the resin lens surface, guaranteeing coating effectiveness while reducing costs. The multi-step thickness control process effectively manages the coating thickness, improving accuracy. A final testing process is also included to test the adhesion of the coated film, ensuring coating effectiveness, and to assess the quality of the coating itself, providing subsequent testing assurance and enhancing the overall application effectiveness of the method.

[0042] 2. In this invention, by providing an outer recovery cover, during the rotational coating process, the coating solution inevitably splashes outward due to centrifugal force. The outer recovery cover effectively blocks the coating solution, preventing splashing. Simultaneously, the heating element can be directly activated to effectively heat the coating solution, preventing solidification and maintaining its fluidity on the inner wall of the outer recovery cover. The flowing coating solution effectively flows down the inner conical inclined surface and is ultimately recovered through the recovery hole. The recovered coating solution... The material can be collected by a sliding inclined plate and eventually recycled back to the coating solution tank by a recovery pump. This effectively blocks splashes of the coating solution during the coating process while maintaining its fluidity and recycling, thus avoiding resource waste. In addition, the invention includes a lateral blocking and positioning component, which allows for quick installation, blocking, and positioning of the lens during installation. Due to the extensibility of the lateral blocking and positioning component, it can automatically adjust to the size of the lens to be coated, providing high adjustability. Attached Figure Description

[0043] Figure 1 This is a three-dimensional partial cross-sectional view of a coating device for blackening the non-effective diameter of a resin lens in a mobile phone camera.

[0044] Figure 2 This is an enlarged three-dimensional structural diagram of the lens mounting assembly and drive motor mounting in a coating device for blackening the non-effective diameter resin lens in a mobile phone camera.

[0045] Figure 3 This is an enlarged three-dimensional structural diagram of a lateral blocking and positioning component in a coating device for blackening the non-effective diameter of a resin lens in a mobile phone camera.

[0046] Figure 4This is a top-view magnified partial cross-sectional view of the outer recovery cover in a coating device for blackening the non-effective diameter of resin lenses in a mobile phone camera.

[0047] Legend:

[0048] 1. Coating solution tank; 2. Feed guide tube; 3. Mounting back plate; 4. Recovery pump; 5. Extraction tube; 6. Worktable; 7. Sliding plate; 8. Base; 9. Telescopic coating solution head; 10. Lens mounting assembly; 101. Lens mounting plate; 102. Mounting groove; 103. Lateral shielding and locking assembly; 1031. Shielding chuck; 1032. Top protrusion; 1033. Shielding and locking groove; 1034. External top spring; 11. External recovery cover; 12. Mounting spindle; 13. Drive motor; 14. Heating element; 15. Inner conical slope. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example 1

[0051] This embodiment discloses a method for blackening the non-effective diameter of a resin lens in a mobile phone camera, including the following steps:

[0052] S1. Take the mobile phone camera resin lens that needs to be coated, place it in the ultrasonic cleaning device, add cleaning agent into the device, raise the temperature inside the device to 40℃, and perform ultrasonic cleaning treatment on the resin lens for 25 minutes.

[0053] S2. Take out the cleaned resin lens, place it in the drying device, raise the temperature inside the device to 70°C, and introduce argon gas to air dry the resin lens for 15 minutes.

[0054] S3. Take out the dried resin lens and place it on the polishing device. Keep the polishing device at a speed of 1000r / min to perform external polishing on the resin lens.

[0055] S4. Activate the dust collection structure to effectively adsorb the powder generated during the polishing process;

[0056] S5. After polishing, place the resin lens on the coating device and use the shielding structure to shield the effective diameter of the resin lens, allowing the non-effective diameter to be exposed. At the same time, use the shielding structure to shield the outer periphery of the resin lens. The shielding structure can be one or more of aluminum foil and thin copper sheet.

[0057] S6. Place the resin lens in the heating device and heat it to 70°C, then maintain the temperature for 10 minutes.

[0058] S7. Using clamps, remove the heat-insulating resin lens and place it back on the coating device for fixation.

[0059] S8. Add the 150°C coating solution to the center of the resin lens. The coating solution is a mixture of graphene oxide and epoxy resin.

[0060] S9. Drive the resin lens to rotate rapidly at a speed of 2800r / min. The coating liquid on the surface of the resin lens will spread on the surface of the resin lens due to the centrifugal force, and spread to the unblocked area of ​​the resin lens.

[0061] After 15 minutes, gradually reduce the rotation speed of the resin lens at a rate of 400 r / min until it stops rotating.

[0062] S11. The coating liquid, which is uniformly attached to the surface of the resin lens, cools and solidifies.

[0063] S12. Place the coated resin lens on the polishing device and control the coating thickness in three stages to achieve a thickness of 1mm.

[0064] S13. Place the polished coated resin lens in acid and alkali solutions with a concentration of 5-8% for 20 hours respectively. Observe the surface condition of the coating. If the coating surface is good, the gloss does not change, and there is no decomposition, the coating is successful. Otherwise, the surface coating fails.

[0065] S14. After passing the test, collect and package the resin lenses.

[0066] Example 2

[0067] This embodiment discloses a method for blackening the non-effective diameter of a resin lens in a mobile phone camera, including the following steps:

[0068] S1. Take the mobile phone camera resin lens that needs to be coated, place it in the ultrasonic cleaning device, add cleaning agent into the device, raise the temperature inside the device to 50℃, and perform ultrasonic cleaning treatment on the resin lens for 30 minutes.

[0069] S2. Take out the cleaned resin lens, place it in the drying device, raise the temperature inside the device to 75°C, and introduce argon gas to air dry the resin lens for 20 minutes.

[0070] S3. Take out the dried resin lens and place it on the polishing device. Keep the polishing device at 1100r / min to perform external polishing on the resin lens.

[0071] S4. Activate the dust collection structure to effectively adsorb the powder generated during the polishing process;

[0072] S5. After polishing, place the resin lens on the coating device and use the shielding structure to shield the effective diameter of the resin lens, allowing the non-effective diameter to be exposed. At the same time, use the shielding structure to shield the outer periphery of the resin lens. The shielding structure can be one or more of aluminum foil and thin copper sheet.

[0073] S6. Place the resin lens in the heating device and heat it to 80°C, then maintain the temperature for 15 minutes.

[0074] S7. Using clamps, remove the heat-insulating resin lens and place it back on the coating device for fixation.

[0075] S8. Add the 180°C coating solution to the center of the resin lens. The coating solution is a mixture of graphene oxide and epoxy resin.

[0076] S9. Drive the resin lens to rotate rapidly at a speed of 3000r / min. The coating liquid on the surface of the resin lens will spread on the surface of the resin lens due to the centrifugal force, and spread to the unblocked area of ​​the resin lens.

[0077] After 20 minutes, gradually reduce the rotation speed of the resin lens at a rate of 400 r / min until it stops rotating.

[0078] S11. The coating liquid, which is uniformly attached to the surface of the resin lens, cools and solidifies.

[0079] S12. Place the coated resin lens on the polishing device and control the coating thickness in 4 stages to achieve a thickness of 1.5mm.

[0080] S13. Place the polished coated resin lens in acid and alkali solutions with a concentration of 5-8% for 22 hours respectively. Observe the surface condition of the coating. If the coating surface is good, the gloss does not change, and there is no decomposition, the coating is successful. Otherwise, the surface coating fails.

[0081] S14. After passing the test, collect and package the resin lenses.

[0082] In this embodiment, the thickness of the coating is controlled in multiple steps, which can effectively control the coating thickness and improve the accuracy of the coating thickness.

[0083] Example 3

[0084] This embodiment discloses a method for blackening the non-effective diameter of a resin lens in a mobile phone camera, including the following steps:

[0085] S1. Take the mobile phone camera resin lens that needs to be coated, place it in the ultrasonic cleaning device, add cleaning agent into the device, raise the temperature inside the device to 60℃, and perform ultrasonic cleaning treatment on the resin lens for 35 minutes.

[0086] S2. Take out the cleaned resin lens, place it in the drying device, raise the temperature inside the device to 80°C, and introduce argon gas to air dry the resin lens for 25 minutes.

[0087] S3. Take out the dried resin lens and place it on the polishing device. Keep the polishing device at a speed of 1200r / min to perform external polishing on the resin lens.

[0088] S4. Activate the dust collection structure to effectively adsorb the powder generated during the polishing process;

[0089] S5. After polishing, place the resin lens on the coating device and use the shielding structure to shield the effective diameter of the resin lens, allowing the non-effective diameter to be exposed. At the same time, use the shielding structure to shield the outer periphery of the resin lens. The shielding structure can be one or more of aluminum foil and thin copper sheet.

[0090] S6. Place the resin lens in the heating device and heat it to 90°C, then maintain the temperature for 20 minutes.

[0091] S7. Using clamps, remove the heat-insulating resin lens and place it back on the coating device for fixation.

[0092] S8. Add the 230℃ coating solution to the center of the resin lens. The coating solution is a mixture of graphene oxide and epoxy resin.

[0093] S9. Drive the resin lens to rotate rapidly at a speed of 3200r / min. The coating liquid on the surface of the resin lens will spread on the surface of the resin lens due to the centrifugal force, and spread to the unblocked area of ​​the resin lens.

[0094] After 25 minutes, gradually reduce the rotation speed of the resin lens at a rate of 400 r / min until it stops rotating.

[0095] S11. The coating liquid, which is uniformly attached to the surface of the resin lens, cools and solidifies.

[0096] S12. Place the coated resin lens on the polishing device and control the coating thickness in 5 steps to achieve a thickness of 2mm.

[0097] S13. Place the polished coated resin lens in acidic and alkaline solutions of 5-8% concentration respectively and immerse for 24 hours. Observe the surface condition of the coating. If the coating surface is good, the gloss does not change, and there is no decomposition, the coating is successful. Otherwise, the surface coating fails.

[0098] S14. After passing the test, collect and package the resin lenses.

[0099] Example 4:

[0100] This embodiment discloses a coating device for blackening resin lenses with non-effective diameter in mobile phone cameras, including a coating liquid tank 1 and a base 8. A workbench 6 is fixedly installed on the top of the base 8. A sliding inclined plate 7 is fixedly installed inside the workbench 6. An outer recovery cover 11, a recovery pump 4, and a mounting back plate 3 are fixedly installed on the top of the workbench 6. Several recovery holes are opened on the inner side of the outer recovery cover 11 on the top surface of the workbench 6. The coating liquid tank 1 is fixedly installed on the side wall of the mounting back plate 3. A telescopic coating liquid head 9 is fixedly installed on the bottom of the coating liquid tank 1. A guide pipe 2 and a suction pipe 5 are fixedly installed on the top and side wall of the recovery pump 4, respectively. One end of the guide pipe 2 is fixedly connected to the bottom surface of the coating liquid tank 1, and one end of the suction pipe 5 is located inside the workbench 6. A drive motor 13 is fixedly installed inside the base 8 through a mounting bracket. A mounting spindle 12 is fixedly installed on one end of the output shaft of the drive motor 13. A lens mounting assembly 10 is fixedly installed at the top. The telescopic coating liquid head 9 is located directly above the lens mounting assembly 10. The lens mounting assembly 10 consists of a lens mounting plate 101 and a side-blocking locking assembly 103. The lens mounting plate 101 has a mounting groove 102 inside. The side-blocking locking assembly 103 is provided inside the lens mounting plate 101. The side-blocking locking assembly 103 consists of a blocking locking plate 1031, a top protrusion 1032, and an outer top spring 103. The system consists of four components: one end of the outer top spring 1034 is fixedly mounted with a shielding chuck 1031, the other end of the outer top spring 1034 is fixedly connected to the inner wall of the lens mounting plate 101, a top protrusion 1032 is fixedly mounted on the top surface of the shielding chuck 1031, a shielding slot 1033 is provided on one side of the shielding chuck 1031, an inner conical inclined surface 15 is provided on the inner wall of the outer recovery cover 11, and an electric heating tube 14 is longitudinally fixedly mounted in the shell cavity of the outer recovery cover 11.

[0101] During the rotary coating process, the coating solution inevitably splashes outwards due to centrifugal force. At this time, the outer recovery cover 11 can effectively block the coating solution, thereby preventing splashing. At the same time, the heating element 14 can be turned on directly, which can effectively heat the coating solution, thereby preventing the coating solution from solidifying and maintaining the fluidity of the coating solution on the inner wall of the outer recovery cover 11. The flowing coating solution can effectively flow down through the inner conical inclined surface 15 and can finally be effectively recovered through the recovery hole. The recovered coating solution can be collected through the sliding inclined plate 7 and finally returned to the coating solution tank 1 by the recovery pump 4. When installing the lens, the lens can be quickly installed, blocked, and positioned by the lateral blocking and positioning component 103.

[0102] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A coating apparatus, characterized in that, The system includes a coating solution tank (1) and a base (8). A workbench (6) is fixedly installed on the top of the base (8). A sliding inclined plate (7) is fixedly installed inside the workbench (6). An outer recovery cover (11), a recovery pump (4), and a mounting back plate (3) are fixedly installed on the top of the workbench (6). Several recovery holes are opened on the inner side of the outer recovery cover (11) on the top surface of the workbench (6). The coating solution tank (1) is fixedly installed on the side wall of the mounting back plate (3). A telescopic coating liquid head (9) is fixedly installed at the bottom of the liquid tank (1). A guide pipe (2) and a suction pipe (5) are fixedly installed on the top and side wall of the recovery pump (4), respectively. One end of the guide pipe (2) is fixedly connected to the bottom surface of the coating liquid tank (1). One end of the suction pipe (5) is located inside the workbench (6). A drive motor (13) is fixedly installed inside the base (8) through a mounting bracket. A mounting spindle (12) is fixedly installed at one end of the output shaft of the drive motor (13). The top of the mounting spindle (12) is fixedly mounted with a lens mounting assembly (10). The telescopic coating liquid head (9) is located directly above the lens mounting assembly (10). The lens mounting assembly (10) consists of a lens mounting plate (101) and a side shielding positioning assembly (103). The lens mounting plate (101) has an installation groove (102) inside. The lens mounting plate (101) has a side shielding positioning assembly (103) inside. The inner wall of the outer recovery cover (11) has an inner conical inclined surface (15). The outer recovery cover (11) has a heating tube (14) fixedly mounted vertically inside the shell cavity of the outer recovery cover (11).

2. The coating apparatus according to claim 1, characterized in that, The lateral blocking and positioning assembly (103) consists of a blocking chuck (1031), a top protrusion (1032), and an outer top spring (1034). One end of the outer top spring (1034) is fixedly mounted with the blocking chuck (1031), and the other end of the outer top spring (1034) is fixedly connected to the inner wall of the lens mounting plate (101). The top protrusion (1032) is fixedly mounted on the top surface of the blocking chuck (1031), and a blocking and positioning groove (1033) is provided on one side of the blocking chuck (1031).

3. A method for blackening the non-effective diameter of a resin lens in a mobile phone camera, using the coating apparatus as described in any one of claims 1-2, characterized in that, Includes the following steps: S1. Take the mobile phone camera resin lens that needs to be coated, place it in the ultrasonic cleaning device, add cleaning agent into the device, raise the temperature inside the device, and perform ultrasonic cleaning treatment on the resin lens for a period of time. S2. Take out the cleaned resin lens and place it in the drying device. Increase the temperature inside the device and introduce gas to dry the resin lens. S3. Take out the dried resin lens and place it on the polishing device. Keep the polishing device rotating to perform external polishing on the resin lens. S4. Activate the dust collection structure to effectively adsorb the powder generated during the polishing process; S5. After polishing, place the resin lens on the coating device and use the shielding structure to partially shield the resin lens. S6. Place the resin lens in the heating device to raise its temperature and maintain it for a period of time; S7. Using clamps, remove the heat-insulating resin lens and place it back on the coating device for fixation. S8. Add the heated coating solution to the center of the resin lens. S9. Drive the resin lens to rotate. The coating liquid on the surface of the resin lens will spread on the surface of the resin lens due to the centrifugal force, and spread to the unblocked area of ​​the resin lens. S10. After a period of time, reduce the rotation speed of the resin lens until it stops rotating. S11. The coating liquid, which is uniformly attached to the surface of the resin lens, cools and solidifies. S12. Place the coated resin lens on the polishing device and control the coating thickness multiple times to achieve the required thickness. S13. Place the polished coated resin lens in acid and alkaline solutions respectively, immerse them for a period of time, and observe the condition of the coated surface. S14. After passing the test, collect and package the resin lenses.

4. The method for blackening the non-effective diameter resin lens in a mobile phone camera according to claim 3, characterized in that, In step S1, the resin lens of the mobile phone camera that needs to be coated is taken and placed in an ultrasonic cleaning device. A cleaning agent is added to the device, and the temperature inside the device is raised to 40-60°C. The resin lens is then subjected to ultrasonic cleaning for 25-35 minutes.

5. The method for blackening the non-effective diameter resin lens in a mobile phone camera according to claim 3, characterized in that, In step S2, the cleaned resin lens is taken out and placed in a drying device. The temperature inside the device is raised to 70-80°C, and argon gas is introduced to air dry the resin lens for 15-25 minutes.

6. The method for blackening the non-effective diameter resin lens in a mobile phone camera according to claim 3, characterized in that, In step S3, the dried resin lens is taken out and placed on a polishing device. The polishing device is kept at a speed of 1000-1200 r / min to perform external polishing on the resin lens. In step S5, after polishing, the resin lens is placed on a coating device. The effective diameter of the resin lens is blocked by a shielding structure, allowing the non-effective diameter to be exposed. At the same time, the outer periphery of the resin lens is shielded by the shielding structure, which is one or more of aluminum foil and copper sheet.

7. The method for blackening the non-effective diameter of a resin lens in a mobile phone camera according to claim 3, characterized in that, In step S6, the resin lens is placed in a heating device and heated to 70-90°C, and maintained for 10-20 minutes.

8. The method for blackening the non-effective diameter resin lens in a mobile phone camera according to claim 3, characterized in that, In step S8, a coating solution at 150-230°C is dropped onto the center of the resin lens. The coating solution is a mixture of graphene oxide and epoxy resin.

9. A method for blackening the non-effective diameter of a resin lens in a mobile phone camera according to claim 3, characterized in that, In step S9, the resin lens is driven to rotate rapidly at a speed of 2800-3200 r / min. Due to the centrifugal force, the coating liquid on the surface of the resin lens will spread on the surface of the resin lens and spread to the unobstructed area on the resin lens.

10. A method for blackening the non-effective diameter of a resin lens in a mobile phone camera according to claim 3, characterized in that, In step S10, after 15-25 minutes, the rotation speed of the resin lens is gradually reduced at a rate of 400 r / min until it stops rotating. In step S12, the coated resin lens is placed on a polishing device, and the thickness of the coating is controlled in 3-5 steps to achieve a thickness of 1-2 mm. In step S13, the polished coated resin lens is immersed in acidic and alkaline solutions with a concentration of 5-8% for 20-24 hours respectively. The surface condition of the coating is observed. If the coating surface is good, the gloss does not change, and no decomposition occurs, the coating is successful. Otherwise, the coating fails.

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