Online appearance flaw detection device for optical lens

Abstract

The invention discloses an optical lens online appearance flaw detection device, and relates to the technical field of lens appearance detection, the optical lens online appearance flaw detection device comprises a workbench, the workbench is provided with a cleaning module and a detection module, the cleaning module is used for cleaning the surface of a lens, and the detection module is used for carrying out appearance detection on the cleaned lens; the cleaning module comprises a clamping assembly, a wetting assembly and a wiping assembly, and the clamping assembly is used for clamping and driving a lens to rotate along the axis of the lens during cleaning; the wetting assembly and the wiping assembly are correspondingly located above the clamping assembly, the wetting assembly is used for wetting the circumferential outer wall of the lens through cleaning liquid, and the wiping assembly is used for conducting pressurized wiping on the circumferential outer wall of the lens. The method has the effect of improving the accuracy of the appearance detection result of the optical lens.

Description

Technical Field

[0001] This application relates to the technical field of lens appearance inspection, and in particular to an online appearance defect inspection device for optical lenses. Background Technology

[0002] Optical lenses are transparent glass or plastic materials. Their manufacturing process generally includes precision grinding, polishing, and bonding techniques. Their main function in application is to change the direction of light propagation by utilizing the principle of light refraction. Optical lenses are the core components of precision optical devices and are widely used in industrial research fields such as ophthalmology and vision correction, photography, and scientific experimental optical instruments and equipment.

[0003] After grinding and polishing, optical lenses typically undergo ultrasonic cleaning and heat drying to keep the lens surface clean and dry for subsequent appearance inspection. This appearance inspection directly impacts the optical performance, product lifespan, and user experience. The appearance inspection involves shining light on the lens in bright or dark environments to detect defects such as scratches, dust, bubbles, or stains.

[0004] The inspection of visual defects in optical lenses is usually done manually or by machine. Traditional manual inspection is inefficient and can easily cause irreversible damage to workers' eyes during long-term inspection. When using automated machine inspection, the lens is clamped and transported. Usually, a robotic arm is used to hold the outer circumference of the lens to complete the transport. However, during long-term operation, the robotic arm itself can be contaminated by oil and other pollutants. This will cause the robotic arm to leave oil and other stains on the outer circumference of the lens, ultimately affecting the accuracy of the lens appearance inspection results. Summary of the Invention

[0005] To address the issue of robotic arms leaving stains on optical lenses during actual transport, this application provides an online appearance defect detection device for optical lenses.

[0006] This application provides an online appearance defect detection device for optical lenses, employing the following technical solution: An online appearance defect detection device for optical lenses includes a worktable, on which are arranged: The cleaning module is used to clean the surface of the lens; The inspection module is used to inspect the appearance of the cleaned lenses; The cleaning module includes: A clamping assembly for holding and driving the lens upright during cleaning, so that the lens can rotate along its own horizontal axis; and Corresponding to the wetting component and wiping component located above the clamping component, the wetting component is used to wet the outer circumferential wall of the lens with cleaning liquid, and the wiping component is used to apply pressure to wipe the outer circumferential wall of the lens.

[0007] Optionally, the wetting component includes a flexible absorbent and a guide tube. One end of the guide tube is inserted into the flexible absorbent, and the other end is used to connect to an external liquid supply device. The guide tube is used to wet the flexible absorbent with cleaning liquid during cleaning. The flexible absorbent is used to maintain contact with the top area of ​​the outer circumference of the lens during cleaning so that the cleaning liquid can evenly wet the outer circumference of the lens.

[0008] Optionally, the wiping assembly includes a lens cleaning strip disposed between the flexible absorbent and the lens. During cleaning, one side of the lens cleaning strip contacts the flexible absorbent, and the other side contacts the outer circumferential wall of the lens, so that the cleaning liquid inside the flexible absorbent penetrates the lens cleaning strip and wets and wipes the outer circumferential wall of the lens.

[0009] Optionally, the wiping assembly further includes an unwinding component and a rewinding component, which are located at both ends of the lens cleaning cloth strip along its length, respectively, to drive the lens cleaning cloth strip to move along its own length, so that the lens cleaning cloth strip removes the area of ​​itself contaminated with dirt and provides a clean surface.

[0010] Optionally, the flexible absorbent is embedded with a pressure plate in the inner area near the lens cleaning cloth strip. The pressure plate is made of conductive material and can deform itself to fit tightly against the outer circumference of the lens after being pressed. The pressure plate is in a grounded state. A pressure mechanism is provided on the side of the pressure plate away from the lens cleaning cloth strip. The pressure mechanism is used to apply pressure to the pressure plate so that the pressure plate moves towards the lens.

[0011] Optionally, the cleaning module further includes two sets of air blowing components, which are respectively disposed on both sides of the humidifying component, for blowing and cleaning the two sides of the lens from top to bottom.

[0012] Optionally, the clamping assembly includes two sets of flexible conductive strips made of conductive material. During cleaning, the two sets of conductive strips are located at the bottom of the lens and contact the two side edges of the lens respectively. Both sets of conductive strips are arranged around the circumference of the lens and are in a grounded state.

[0013] Optionally, the detection module includes a detection stage, a detection camera, and a detection light source. The detection stage is fixed horizontally and at intervals to the top surface of the workbench. A light-transmitting plate is embedded in the center of the detection stage. The light-transmitting plate is used to place the lens to be detected. The detection light source is correspondingly arranged between the light-transmitting plate and the top surface of the workbench. At least two sets of detection cameras are provided. One set of detection cameras is arranged directly above the light-transmitting plate, and at least one set of detection cameras is arranged on one side of the light-transmitting plate. These cameras are used to detect defects on the outer circumferential wall surface of the lens.

[0014] Optionally, the workbench is also equipped with a conveying module, which includes an infeed conveyor belt, an outfeed conveyor belt, and a transfer component. The transfer component is used to drive the lens to move between the infeed conveyor belt, the cleaning module, the detection module, and the outfeed conveyor belt.

[0015] In summary, this application includes at least one of the following beneficial effects: 1. During lens cleaning, the lens is first clamped and fixed using the clamping assembly, and then rotated to an upright position. As the lens rotates, the guide tube introduces external cleaning fluid into the flexible absorbent component, allowing the fluid to soak into it. Since the flexible absorbent component is in contact with the lens cleaning cloth, which in turn is in contact with the outer circumferential surface of the lens, the cleaning fluid quickly penetrates the cloth, thoroughly wetting the outer circumferential surface of the lens. As the lens continues to rotate, the cleaning fluid dissolves and softens stubborn stains on the lens's outer circumferential surface. After wetting the lens, the pressure mechanism actively applies pressure to the pressure plate, causing the pressure plate to... The pressure plate actively presses against the outer circumference of the lens. During this process, the pressure plate actively squeezes the corresponding area of ​​the flexible absorbent and the lens cleaning cloth, making the pressure plate more closely adhere to the lens. Since the pressure plate is in a grounded state, it can transfer the charge accumulated on the outer circumference of the lens to the external grounding device, thereby eliminating static electricity on the outer circumference of the lens. This effectively avoids the subsequent interference of dust attracted by static electricity with the inspection. In addition, the pressure plate can push the lens cleaning cloth to press firmly against the outer circumference of the lens, allowing the lens cleaning cloth to wipe away stubborn stains on the outer circumference of the lens. It can also achieve uniform cooling of the lens surface by reducing the temperature of the cleaning liquid, effectively preventing the lens from interfering with subsequent inspections due to high surface temperature. 2. When the lens rotates, excess cleaning liquid is squeezed out when the pressure plate is pressed against the outer circumference of the lens. The squeezed-out cleaning liquid can fall along both sides of the lens by its own gravity. The falling cleaning liquid can uniformly cool both sides of the lens, and can also neutralize the static electricity on both sides of the lens as it falls. The air blowing components on both sides of the lens can actively blow the falling cleaning liquid away from the lens surface. By adjusting the power of the air blowing components, the amount of cleaning liquid remaining on the lens surface can be precisely controlled to ensure that there are no residual liquid stains on the lens surface and to avoid secondary pollution. The fallen cleaning liquid is guided and collected by the flexible conductive strip. The flexible conductive strip is in a grounded state, which can promptly conduct away the static charge in the residual liquid and prevent it from re-adsorbing dust particles. Attached Figure Description

[0016] Figure 1This is a schematic diagram illustrating the overall structure of the detection device according to an embodiment of this application; Figure 2 This is a schematic diagram illustrating the structure of the conveying module in an embodiment of this application; Figure 3 This is a partial structural diagram of the cleaning module shown in an embodiment of this application; Figure 4 This is a schematic diagram illustrating the structure of the wetting component and the wiping component according to an embodiment of this application; Figure 5 This is a cross-sectional schematic diagram illustrating the internal structure of the flexible absorbent component according to an embodiment of this application; Figure 6 This is a schematic diagram illustrating the structure of the air blowing assembly in an embodiment of this application; Figure 7 This is a schematic diagram illustrating the structure of the clamping assembly in an embodiment of this application; Figure 8 This is a partial cross-sectional schematic diagram illustrating the flexible conductive strip structure in an embodiment of this application; Figure 9 This is a partial structural diagram of the detection module shown in an embodiment of this application.

[0017] Explanation of reference numerals in the attached drawings: 1. Workbench; 11. Machine frame; 2. Cleaning module; 21. Clamping assembly; 211. Clamping cylinder; 212. Contact wheel; 213. Mounting bracket; 214. Rotary cylinder; 215. Flexible conductive strip; 216. Guide tube; 22. Wetting assembly; 221. Flexible absorbent component; 222. Guide tube; 223. Pressure plate; 224. Pressure roller; 225. Pressure cylinder; 23. Wiping assembly; 231. Mirror cleaning cloth strip; 232. Unwinding component; 233. Rewinding component; 24. Air nozzle; 25. Air tube; 3. Detection module; 31. Detection table; 32. Detection camera; 33. Detection light source; 34. Light-transmitting plate; 4. Conveying module; 41. Feeding conveyor belt; 42. Discharging conveyor belt; 43. Transfer assembly; 431. Support frame; 432. Transfer guide rail; 433. Transfer slide; 434. Push cylinder; 435. Mounting plate; 436. Guide rod; 437. Adsorption plate; 5. Lenses. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0019] The inspection of visual defects in optical lenses is done automatically by machines. The automatic inspection involves the clamping and transfer of lenses. Usually, a robotic arm is used to hold the outer circumference of the lens to complete the transfer. However, during long-term operation, the robotic arm itself may be contaminated by pollutants such as oil or dust. This will cause the robotic arm to leave stubborn stains such as oil on the outer circumference of the lens, which will ultimately affect the accuracy of the lens appearance inspection results.

[0020] Meanwhile, after grinding and polishing, optical lenses usually undergo ultrasonic cleaning and heating drying to keep the lens surface clean and dry. During the drying process, static electricity is generated due to friction, which easily attracts dust from the air, thus affecting the accuracy of subsequent testing. Furthermore, after heating and drying, the surface temperature of the lens is usually higher than the temperature of the testing environment. If it enters the testing process directly, the contact between the lens surface and the air will generate slight airflow disturbances, which will undoubtedly affect the accuracy of the testing equipment in identifying defects on the lens surface.

[0021] Based on the above problems, this application discloses an online appearance defect detection device for optical lenses, see reference. Figure 1 and Figure 2 The online appearance defect detection device for optical lenses includes a horizontally placed workbench 1, a cleaning module 2 spaced apart on the workbench 1, a detection module 3, and a transport module 4 that drives the lens 5 to move between the modules.

[0022] Understandably, after being cleaned and heated and dried, the lens 5 is first transported by the conveying module 4 to the cleaning module 2 for static elimination, cooling and secondary cleaning operations. This removes the static charge on the surface of the lens 5 and lowers its surface temperature. At the same time, it removes the oil and dust that adhered to the outer wall of the lens 5 during the transfer process, ensuring that the lens 5 is in a static-free, temperature-stable and surface-clean state before entering the detection module 3. Subsequently, the lens 5 is transferred from the conveying module 4 to the detection module 3 for automatic detection of appearance defects, thereby effectively improving the accuracy and stability of the detection results.

[0023] For example, the workbench 1 is stably and horizontally placed on the ground of the work area via the frame 11. Both the workbench 1 and the frame 11 can be made of high-strength aluminum alloy to ensure the stability of the overall structure and meet the requirements of lightweighting. At the same time, the surface is anodized to improve corrosion resistance and appearance. The conveying module 4 includes an infeed conveyor belt 41, an outfeed conveyor belt 42, and a transfer component 43. The infeed conveyor belt 41 and the outfeed conveyor belt 42 run horizontally at both ends of the workbench 1, respectively, to receive the lens to be tested 5 and to output the tested lens 5. The transfer component 43 is located in the middle of the workbench 1 and is used to drive the lens 5 to move between the infeed conveyor belt 41, the cleaning module 2, the testing module 3, and the outfeed conveyor belt 42.

[0024] For example, the transfer component 43 includes a support frame 431, a transfer guide rail 432, and a transfer slide 433. The support frame 431 is fixed to the top surface of the workbench 1 and is located on one side of the cleaning module 2 and the detection module 3. The transfer guide rail 432 is horizontally fixed on the support frame 431 and extends along the length of the workbench 1. The transfer slide 433 is slidably connected to the transfer guide rail 432 and can slide back and forth along the length of the transfer guide rail 432. The transfer guide rail 432 is preferably a pneumatic slide rail, which is driven by compressed air to achieve smooth and efficient sliding of the transfer slide 433. Two push cylinders 434 are fixedly spaced at the top of the transfer slide 433. The piston rods of the two push cylinders 434 pass vertically downward through the transfer slide 433 and are fixed to a mounting plate 435. Three guide rods 436 are vertically inserted and fixed on the mounting plate 435. Adsorption plates 437 are respectively fixed at the bottom of the three guide rods 436. The adsorption plates 437 are preferably electric vacuum suction cups, and the adsorption force can be adjusted by a control circuit. When the adsorption plates 437 contact the surface of the lens 5, they can generate a stable negative pressure to achieve non-destructive gripping and release of the lens 5. A buffer spring (not shown) can be sleeved on the outer periphery of the guide rods 436 to absorb the vibration generated during the transfer process and prevent the lens 5 from shaking or being damaged during gripping and moving. At the same time, the guide rods 436 pass upward through and slide vertically to the transfer slide 433 to ensure that the adsorption plates 437 can rise and fall smoothly in the vertical direction.

[0025] Understandably, when the transfer slide 433 slides along the transfer guide rail 432 until the end suction plate 437 aligns with the lens 5 on the feed conveyor belt 41, the cylinder 434 is activated, causing the mounting plate 435 and the suction plate 437 to descend vertically along the length of the guide rod 436 until the suction plate 437 makes stable contact with the surface of the lens 5. Then, the electric vacuum suction cup is activated, forming a stable negative pressure and adsorbing the surface of the lens 5. Subsequently, the cylinder 434 is pushed back up, causing the lens 5 to rise vertically to a safe height. The transfer slide 433 then slides horizontally along the transfer guide rail 432. The lens 5 is moved until it reaches the position above the cleaning module 2. At this point, the cylinder 434 is activated again, causing the lens 5 to descend vertically into the working area of ​​the cleaning module 2. This process is repeated until cleaning is complete. After cleaning, the transfer slide 433 continues to move along the guide rail to the testing module 3, repeating the descent, positioning, and rising actions to precisely deliver the lens 5 into the testing area for optical performance analysis. After testing, the lens 5 is transferred back to the discharge conveyor belt 42. The electric vacuum suction cup releases negative pressure, smoothly placing the lens 5, and the cylinder 434 retracts, preparing for the next transfer. The entire process is highly automated with smooth transitions, effectively improving the efficiency and accuracy of lens 5 testing.

[0026] For example, refer to Figures 3 to 8The cleaning module 2 includes a clamping assembly 21 and corresponding wetting and wiping assemblies 22 and 23 located above the clamping assembly 21. The clamping assembly 21 is used to clamp and drive the lens 5 upright during cleaning, allowing the lens 5 to rotate along its own horizontal axis for cleaning, while the lens 5 remains upright during the cleaning operation. The wetting assembly 22 can wet the outer circumference of the lens 5 with cleaning liquid, while the wiping assembly 23 can apply pressure to wipe the outer circumference of the lens 5, thereby thoroughly removing dust and stubborn stains that adhered to the outer circumference of the lens 5 during clamping or transportation.

[0027] In some embodiments, the wetting component 22 includes a flexible absorbent 221 and a guide tube 222. The flexible absorbent 221 is located directly above the lens 5 in its upright state. The flexible absorbent 221 is preferably a cleaning sponge or a polymer sponge, giving it good hydrophilicity and adsorption capacity, enabling it to evenly absorb and slowly release cleaning fluid. Furthermore, it can tightly adhere to the outer wall of the lens 5 under pressure, preventing scratches on the lens 5 surface. One end of the guide tube 222 is connected to a cleaning fluid supply device, and the other end is inserted into the flexible absorbent 221. When cleaning fluid needs to be supplied to the flexible absorbent 221, the supply device continuously introduces the cleaning fluid into the flexible absorbent 221 through the guide tube 222, allowing the flexible absorbent 221 to be soaked in the cleaning fluid, thereby achieving uniform wetting during the rotation of the lens 5. The cleaning fluid is preferably an antistatic solvent or cleaning agent, which, while cleaning the surface of the lens 5, eliminates the charge on the surface of the lens 5, preventing secondary dust adsorption and further improving the cleaning effect.

[0028] Furthermore, a pressure plate 223 is embedded in the inner region of the flexible absorbent component 221 near the lens 5. The pressure plate 223 is made of conductive material, preferably a thin iron sheet. The pressure plate 223 has an arc-shaped structure that conforms to the outer circumference of the lens 5. When the pressure plate 223 moves close to the lens 5, it squeezes a portion of the flexible absorbent component 221 between itself and the lens 5. This ensures that the portion of the flexible absorbent component 221 between the lens 5 and the pressure plate 223 is tightly attached to the outer wall of the lens 5, guaranteeing that the pressure plate 223 provides uniform pressure when the flexible absorbent component 221 contacts the outer wall of the lens 5. This prevents scratches or incomplete cleaning of the outer circumference of the lens 5 due to uneven pressure. The pressure plate 223 is also connected to an external grounding device via a wire, which can further discharge static electricity from the surface of the lens 5, achieving active anti-static cleaning.

[0029] In some embodiments, two pressure rollers 224 are provided on the side of the pressure plate 223 away from the lens 5. The two pressure rollers 224 are parallel to each other and located at both ends of the pressure plate 223, and are pressed against the pressure plate 223. A connecting shaft is hinged to the side of the pressure rollers 224 away from the pressure plate 223 through a bracket. A pressure cylinder 225 is provided on the side of the connecting shaft away from the pressure rollers 224. The output shaft of the pressure cylinder 225 is fixed to the connecting shaft. The extension and retraction movement of the output shaft of the pressure cylinder 225 drives the two pressure rollers 224 to press against or move away from the pressure plate 223, thereby driving the pressure plate 223 to move closer to or away from the outer wall of the lens 5, thereby realizing the adjustment of the pressing force on the flexible absorbent 221. Each pressure roller 224 is equipped with a torsion spring at the hinge point between its support and the connecting shaft. The torsion spring provides a restoring force for the retraction of the two pressure rollers 224. When the output shaft of the pressure cylinder 225 extends, the two pressure rollers 224 move away from each other against the elastic force of the torsion spring, while simultaneously pushing the pressure plate 223 against the flexible absorbent 221 and pressing it against the outer wall of the lens 5. The pressure cylinder 225 can be fixed to the top surface of the workbench 1 by a fixing bracket. To facilitate the adjustment of the height position of the pressure cylinder 225, a pneumatic slide rail can be installed on the fixing bracket corresponding to the pressure cylinder 225 to freely adjust the distance between the pressure cylinder 225 and the lens 5. This adjustment method is a conventional technical means in this field and will not be described in detail here.

[0030] For example, the wiping assembly 23 includes a lens cleaning strip 231, an unwinding component 232, and a rewinding component 233. The lens cleaning strip 231 is laid between the flexible absorbent component 221 and the lens 5. The unwinding component 232 and the rewinding component 233 are located at both ends of the length direction of the lens cleaning strip 231. Both the unwinding component 232 and the rewinding component 233 are cylindrical in shape and their axes are horizontal. A roller is inserted through the hollow interior of both the unwinding component 232 and the rewinding component 233. The roller is coaxially fixed with the output shaft of the corresponding micro motor. The micro motor is fixed on the outer wall of the cylinder. Through slots are opened on the side walls of the unwinding component 232 and the rewinding component 233 so that the lens cleaning strip 231 can pass through. The roller is driven to rotate by the micro motor to realize the automatic unwinding and rewinding of the lens cleaning strip 231.

[0031] Understandably, when it is necessary to clean the lens 5, the clamping assembly 21 first adjusts the lens 5 from a horizontal state to a vertical state, and the flexible absorbent 221 is positioned directly above the lens 5. At this time, the outer circumference of the lens 5 needs to be moistened by the flexible absorbent 221 in order to dissolve stubborn stains. The guide tube 222 injects cleaning fluid into the flexible absorbent component 221. After the flexible absorbent component 221 is fully soaked in the cleaning fluid, the pressure cylinder 225 pushes the two pressure rollers 224 to press against the pressure plate 223. Then, the pressure plate 223 is pressed against the outer wall of the lens 5 by the pressure rollers 224. During this process, the flexible absorbent component 221 comes into contact with the lens cleaning cloth strip 231. The cleaning fluid in the flexible absorbent component 221 gradually penetrates into the lens cleaning cloth strip 231, making the lens cleaning cloth strip 231 evenly wet. The wet lens cleaning cloth strip 231 is driven to contact the circumferential outer wall surface of the lens 5. At this time, the wet lens cleaning cloth strip 231 can evenly apply the cleaning fluid to the circumferential outer wall surface of the lens 5. Since the lens 5 is rotating along its own axis, the cleaning fluid can evenly cover the entire circumferential outer wall of the lens 5, so that the cleaning fluid can fully dissolve the stubborn stains on the circumferential outer wall surface of the lens 5. Throughout the wetting process of lens 5, pressure plate 223 is grounded. Pressure plate 223 transfers the charge accumulated on the outer circumference of lens 5 to the external grounding device, thereby eliminating static electricity on the outer circumference of lens 5 and effectively preventing subsequent interference with testing due to dust attraction caused by static electricity. It can also appropriately lower the temperature of the external cleaning liquid, ensuring uniform cooling of the lens 5 surface upon contact with it, effectively preventing interference from high surface temperature.

[0032] Furthermore, after the outer circumferential surface of the lens 5 is fully wetted by the cleaning fluid and the stains are dissolved, the pressure cylinder 225 further applies pressure to the pressure plate 223, causing the pressure plate 223 to continue moving closer to the lens 5. The flexible absorbent component 221 is further compressed and deformed by the pressure plate 223, pushing the lens cleaning cloth 231 to adhere tightly to the outer circumferential surface of the lens 5. During this process, excess cleaning fluid inside the flexible absorbent component 221 and the lens cleaning cloth 231 is squeezed out and drained from the edge. As the lens 5 continues to rotate, the lens cleaning cloth 231, which is tightly attached to the outer circumferential surface of the lens 5, continuously applies pressure to wipe the outer circumferential surface of the lens 5, effectively removing the dissolved stains. Throughout the cleaning and wiping process of the lens 5, the lens cleaning cloth 231 moves slowly under the traction of the winding component 233, ensuring that the part in contact with the lens 5 remains clean at all times, avoiding secondary contamination of the lens 5. After wiping is completed, the guide tube 222 stops injecting cleaning fluid into the flexible absorbent 221. The cleaning fluid inside the flexible absorbent 221 is gradually squeezed dry. At this time, the lens cleaning cloth strip 231 gradually loses its moisture, and the outer circumference of the lens 5 can be dried for the final dry wiping treatment.

[0033] In some embodiments, the cleaning module 2 further includes two sets of air blowing components, which are respectively disposed on both sides of the flexible absorbent 221 for blowing and cleaning the two sides of the lens 5 from top to bottom. The air blowing components include an air nozzle 24 and an air pipe 25. The air nozzle 24 is connected to an external cleaning air source through the air pipe 25. A solenoid valve for controlling the gas flow is installed on the air pipe 25. The air nozzle 24 is tilted downward toward the corresponding side of the lens 5, so that the cleaning airflow can be blown out tangentially from top to bottom along the side of the lens 5, forming an air curtain attached to the surface of the lens 5. The air curtain can effectively block external dust from approaching the surface of the lens 5.

[0034] As the cleaning fluid squeezed out from the flexible absorbent 221 diffuses to both sides and flows from the top of the lens 5 down along both sides, the cleaning airflow from the two air nozzles 24 evenly spreads the cleaning fluid on the sides of the lens 5, allowing the cleaning fluid to cool the sides of the lens 5 evenly. This also accelerates the flow of the cleaning fluid, causing any residual cleaning fluid to quickly detach from the surface of the lens 5. During this process, the cleaning fluid also removes static electricity from the sides of the lens 5, effectively reducing the risk of particles adsorbed by static electricity on the surface of the lens 5. The flow rate of the cleaning airflow can be precisely controlled by adjusting the solenoid valve on the air tube 25, thereby precisely controlling the amount of residual cleaning fluid on the surface of the lens 5, ensuring that there are no residual liquid stains on the surface of the lens 5, and avoiding secondary contamination of the lens 5.

[0035] For example, the clamping assembly 21 includes clamping cylinders 211, contact wheels 212, and a mounting frame 213. The mounting frame 213 is hinged to the top surface of the worktable 1. Two clamping cylinders 211 are provided and symmetrically fixed to the inner side of the mounting frame 213, with the piston rods of the two clamping cylinders 211 arranged opposite to each other. Each clamping cylinder 211 corresponds to two contact wheels 212, and the two corresponding contact wheels 212 are fixed together by a connecting frame. The end of the piston rod of the clamping cylinder 211 is fixed to the connecting frame of the corresponding contact wheel 212. A clamping space for clamping the outer circumferential wall of the lens 5 is formed between the two sets of contact wheels 212. When the piston rod of the clamping cylinder 211 extends, it drives the corresponding contact wheel 212 to move towards each other. Finally, all four contact wheels 212 simultaneously contact the outer circumferential wall of the lens 5 and apply uniform pressure. The contact wheels 212 can preferably be electric wheels, so that the contact wheels 212 drive the lens 5 to rotate through friction when rotating.

[0036] Furthermore, a through hole is provided on the workbench 1 corresponding to the position of the mounting bracket 213. A rotary cylinder 214 is installed in the through hole on the workbench 1. The piston rod of the rotary cylinder 214 passes upward through the through hole and is hinged to the side wall of the mounting bracket 213. When the piston rod of the rotary cylinder 214 extends or retracts, it causes the mounting bracket 213 to swing around the hinge point, thereby adjusting the tilt angle of the lens 5. When the lens 5 is in an upright state, a flexible conductive strip 215 is vertically slidably connected to the side wall of the mounting bracket 213 corresponding to the bottom of the lens 5. The flexible conductive strip 215 is made of conductive material, preferably conductive silicone strip, and is connected to an external grounding device through a wire. The bottom of the flexible conductive strip 215 is slidably connected to the mounting bracket 213 through a slider, thereby facilitating the adjustment of the gap between the flexible conductive strip 215 and the bottom of the lens 5. A telescopic electric cylinder can be installed on the mounting bracket 213 corresponding to the position of the slider at the bottom of the flexible conductive strip 215 to drive the flexible conductive strip 215 to slide as a whole. Furthermore, the flexible conductive strip 215 has a V-shaped guide groove on the inner wall corresponding to the side edge of the lens 5. At the same time, a guide tube 216 is fixed at the bottom of the flexible conductive strip 215. One end of the guide tube 216 is connected to the lowest position of the guide groove, and the other end is externally received by the collection container.

[0037] During cleaning, the flexible conductive strip 215 is located at the bottom of the lens 5 and contacts the edges of both sides of the lens 5. The air nozzles 24 on both sides of the lens 5 can actively blow the falling cleaning liquid onto the sides of the lens 5. The fallen cleaning liquid is guided by the guide groove of the flexible conductive strip 215 into the guide pipe 216, which facilitates the centralized recovery of the cleaning liquid. The flexible conductive strip 215 is in a grounded state, which can promptly conduct away the static charge in the residual liquid and prevent the lens 5 from re-adsorbing dust particles. In some embodiments, the flexible conductive strip 215 is divided into two groups arranged at intervals. Both groups of flexible conductive strips 215 are arranged around the circumference of the lens 5, covering the radius of the lens 5. The gap between the two groups of flexible conductive strips 215 allows the contact wheel 212 to pass through and contact the lens 5. The outer wall of the two groups of flexible conductive strips 215 can be fixed with a support frame, which can stably maintain the arc shape of the flexible conductive strip 215.

[0038] For example, the detection module 3 includes a detection table 31, a detection camera 32, and a detection light source 33. The detection table 31 is fixed horizontally and spaced apart from the top surface of the workbench 1. The detection table 31 is located between the cleaning module 2 and the discharge conveyor belt 42. A horizontally placed light-transmitting plate 34 is embedded in the center of the detection table 31. The top surface of the light-transmitting plate 34 can be used to place the lens 5 to be detected. The detection light source 33 is fixed between the light-transmitting plate 34 and the top surface of the workbench 1. The detection light source 33 emits detection light towards the light-transmitting plate 34 above. At least two sets of detection cameras 32 are provided. One set of detection cameras 32 is fixed directly above the light-transmitting plate 34 by a support, and at least one set of detection cameras 32 is provided on one side of the light-transmitting plate 34 for detecting defects on the outer circumferential wall surface of the lens 5. In this embodiment, two sets of inspection cameras 32 are provided, with only one set of inspection cameras 32 located on the side of the light-transmitting plate 34. In other embodiments, multiple sets of inspection cameras 32 may be provided on the top surface of the inspection stage 31 and evenly distributed around the light-transmitting plate 34 to capture defect images of the surface of the lens 5 from different angles.

[0039] The implementation principle of the online appearance defect detection device for optical lenses in this application embodiment is as follows: When cleaning the lens 5, cleaning liquid is injected into the flexible absorbent 221 through the guide tube 222. After the cleaning liquid soaks the flexible absorbent 221 and the lens cleaning cloth strip 231, it wets the outer circumferential wall surface of the lens 5, thereby dissolving and softening stubborn stains. The relatively low temperature of the cleaning liquid can also uniformly cool the surface of the lens 5. Subsequently, the pressure plate 223 presses the flexible absorbent 221 and the lens cleaning cloth strip 231, and the flexible absorbent is squeezed out. While the cleaning fluid is being applied inside the lens 5 and the cleaning cloth 231, the cleaning cloth 231 applies pressure to wipe the outer circumference of the lens 5, thereby achieving the effect of cleaning the outer circumference of the lens 5. At the same time, the pressure plate 223 is used to eliminate the static electricity remaining on the outer circumference of the lens 5. The excess cleaning fluid squeezed out from the flexible absorbent 221 is evenly spread by the cleaning airflow sprayed from the air nozzle 24, so that the excess cleaning fluid can evenly cool the two sides of the lens 5 and eliminate static electricity, while also cleaning dust.

[0040] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0041] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0042] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An online appearance defect detection device for optical lenses, characterized in that, Includes a workbench (1), on which are provided: Cleaning module (2) is used to clean the surface of lens (5); The detection module (3) is used to perform appearance inspection on the cleaned lens (5); Cleaning module (2) includes: Clamping assembly (21) for clamping and driving the lens (5) upright during cleaning so that the lens (5) rotates along its own horizontal axis; as well as Corresponding to the wetting component (22) and wiping component (23) located above the clamping component (21), the wetting component (22) is used to wet the outer circumferential wall of the lens (5) with cleaning liquid, and the wiping component (23) is used to apply pressure to wipe the outer circumferential wall of the lens (5).

2. The online optical lens appearance defect detection device according to claim 1, characterized in that: The wetting component (22) includes a flexible absorbent (221) and a guide tube (222). One end of the guide tube (222) is inserted into the flexible absorbent (221), and the other end is used to connect to an external liquid supply device. The guide tube (222) is used to wet the flexible absorbent (221) with cleaning liquid during cleaning. The flexible absorbent (221) is used to keep in contact with the top area of ​​the outer circumference of the lens (5) during cleaning so that the cleaning liquid can evenly wet the outer circumference of the lens (5).

3. The online appearance defect detection device for optical lenses according to claim 2, characterized in that: The wiping assembly (23) includes a lens cleaning strip (231), which is disposed between the flexible absorbent (221) and the lens (5). During cleaning, one side of the lens cleaning strip (231) contacts the flexible absorbent (221), and the other side is used to contact the outer circumferential wall of the lens (5) so that the cleaning liquid inside the flexible absorbent (221) can penetrate the lens cleaning strip (231) and wet and wipe the outer circumferential wall of the lens (5).

4. The online appearance defect detection device for optical lenses according to claim 3, characterized in that: The wiping assembly (23) also includes an unwinding component (232) and a winding component (233), which are located at both ends of the lens cleaning cloth strip (231) along its length direction, and are used to drive the lens cleaning cloth strip (231) to move along its own length direction so that the lens cleaning cloth strip (231) removes the area of ​​itself contaminated with dirt and provides a clean surface.

5. The online appearance defect detection device for optical lenses according to claim 3, characterized in that: The flexible absorbent (221) has a pressure plate (223) embedded in the inner area near the lens cleaning cloth strip (231). The pressure plate (223) is made of conductive material and can deform itself to fit tightly against the outer circumference of the lens (5) after being pressed. The pressure plate (223) is in a grounded state. A pressure mechanism is provided on the side of the pressure plate (223) away from the lens cleaning cloth strip (231). The pressure mechanism is used to apply pressure to the pressure plate (223) so that the pressure plate (223) moves towards the lens (5).

6. The online appearance defect detection device for optical lenses according to claim 2, characterized in that: The cleaning module (2) also includes two sets of air blowing components, which are respectively arranged on both sides of the humidifying component (22) for blowing and cleaning the two sides of the lens (5) from top to bottom.

7. The online appearance defect detection device for optical lenses according to claim 6, characterized in that: The clamping assembly (21) includes two sets of flexible conductive strips (215). The flexible conductive strips (215) are made of conductive material. During cleaning, the two sets of flexible conductive strips (215) are located at the bottom of the lens (5) and respectively contact the two side edges of the lens (5). The two sets of flexible conductive strips (215) are arranged around the circumference of the lens (5) and are in a grounded state.

8. The online appearance defect detection device for optical lenses according to claim 1, characterized in that: The detection module (3) includes a detection platform (31), a detection camera (32), and a detection light source (33). The detection platform (31) is fixed horizontally and at intervals on the top surface of the workbench (1). A light-transmitting plate (34) is embedded in the center of the detection platform (31). The light-transmitting plate (34) is used to place the lens (5) to be detected. The detection light source (33) is correspondingly set between the light-transmitting plate (34) and the top surface of the workbench (1). At least two sets of detection cameras (32) are provided. One set of detection cameras (32) is set directly above the light-transmitting plate (34), and at least one set of detection cameras (32) is set on one side of the light-transmitting plate (34) for detecting defects on the outer circumferential wall surface of the lens (5).

9. The online appearance defect detection device for optical lenses according to claim 1, characterized in that: The workbench (1) is also provided with a conveying module (4), which includes a feeding conveyor belt (41), a discharging conveyor belt (42) and a transfer component (43). The transfer component (43) is used to drive the lens (5) to move between the feeding conveyor belt (41), the cleaning module (2), the detection module (3) and the discharging conveyor belt (42).

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