Cleaning system for optical lens equipment

Abstract

The present invention discloses a cleaning system for optical lens equipment, comprising a platform, wherein a conveyor belt is arranged on the upper surface of the platform; a shell is arranged above the conveyor belt, and the two sides of the lower side of the shell are connected to the platform, so that the conveyor belt can freely pass through the lower side of the shell; a discharge pipe is arranged on the top of the shell, and an exhaust fan is arranged inside the discharge pipe; a mechanical module is arranged inside the shell, and the bottom of the mechanical module is connected to the platform; a laser emitter is arranged on the mechanical module, and the laser emitter can adjust the angle of the laser emitter. The optical lenses on the conveyor belt are scanned in batches by the laser emitter. When the parallel light beam emitted by the laser emitter is captured by the surface of the optical lens, plasma is generated to expand the air near the optical lens, and a shock wave is generated to overcome the adhesion between the particles and the optical lens, so that the particles are separated from the lens to achieve the purpose of cleaning.

Description

Technical Field

[0001] The invention belongs to the field of optical lens equipment, and in particular relates to a cleaning system for optical lens equipment. Background Art

[0002] Optical lenses are made of a mixture of high-purity oxides of silicon, boron, sodium, etc. according to a specific formula. They are melted at high temperature in a platinum crucible, stirred evenly with ultrasound to remove bubbles, and then cooled for a long time. The cooled glass blocks pass the purity, transparency, and uniformity inspections, and are heated and forged to form optical lenses. After rigorous cold working, grinding and polishing, optical lenses are finally formed. Polishing powder is required during the grinding and polishing process of optical lenses. After polishing, the optical lenses must be cleaned quickly and promptly, otherwise some residual powder will remain on the mirror surface permanently and cannot be removed.

[0003] At present, organic solvents or water vapor are mainly used for cleaning optical lenses after polishing. After cleaning, the residual liquid on the optical lenses needs to be wiped and removed in time, otherwise the powder left in the liquid will adhere to the optical lenses after it dries, increasing the difficulty of cleaning the optical lenses later. In addition, in the traditional cleaning process, tiny scratches are easily caused on the lenses during the wiping process, affecting the normal use of the optical lenses.

[0004] Chinese patent application No. 201921482206.7 discloses a telescope lens cleaning device with a drying function. The telescope lens cleaning device with a drying function includes a base; two support rods, the two support rods are symmetrically fixedly mounted on the top of the base; a mounting rod, the mounting rod is fixedly mounted on the top of the two support rods; a threaded sleeve, the threaded sleeve is rotatably mounted on the mounting rod; a first bevel gear, the first bevel gear is fixedly sleeved on the threaded sleeve; a motor, the motor is fixedly mounted on the mounting rod; a second bevel gear, the second bevel gear is fixedly mounted on the output shaft of the motor, and the second bevel gear is meshed with the first bevel gear. The above-mentioned prior art dries the lens after washing with water to improve the processing efficiency of the lens; however, in the process of washing and drying, after the water droplets on the lens are dried, the dust in the water droplets will adhere to the optical lens, forming a dark mark, and the mark is difficult to clean. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a cleaning system for optical lens equipment, which drives a laser emitter through a set mechanical module to perform laser scanning cleaning on the optical lens on a conveyor belt. During the cleaning process, the laser generates plasma to expand the air near the optical lens, generating a shock wave, thereby overcoming the adhesion between the particles and the optical lens, so that the particles are separated from the lens to achieve the purpose of cleaning; at the same time, when discharged outwardly through an exhaust fan, the particles with negative charge are discharged out of the shell due to the Lorentz force generated by the magnetic block, and at the same time, an electrostatic environment is formed outside the shell, and the particle dust is affected by the Lorentz force and flies away from the shell, thereby preventing the particle dust from entering the shell and adhering to the optical lens; the detection system is set up to detect the cleanliness of the optical lens to check whether the optical lens is clean and qualified.

[0006] The present invention provides the following technical solutions:

[0007] A cleaning system for optical lens equipment comprises a platform, wherein a conveyor belt is provided on the upper surface of the platform, a rotating wheel is provided below the transmission belt, the rotating wheel is connected to a driving motor, and the driving motor drives the conveyor belt to transmit; a shell is provided above the conveyor belt, and the two sides below the shell are connected to the platform, the conveyor belt can freely pass through the bottom of the shell, a discharge pipe is provided on the top of the shell, an exhaust fan is provided inside the discharge pipe, a mechanical module is provided inside the shell, the bottom of the mechanical module is connected to the platform, a laser emitter is provided on the mechanical module, the laser emitter can adjust the angle of the laser emitter, and the optical lenses on the conveyor belt are scanned in batches by the laser emitter, when the parallel light beam emitted by the laser emitter is captured by the surface of the optical lens, plasma is generated to expand the air near the optical lens, and shock waves are generated to overcome the adhesion between the particles and the optical lens, so that the particles are separated from the lens to achieve the purpose of cleaning; a support rod is provided on the side of the conveyor belt away from the shell, and a detection system is provided on the support rod to detect whether there are residual particles with uncleared textures and scratches on the surface of the optical lens.

[0008] Preferably, an electrostatic generator is provided on the inner wall of the shell, and a magnetic block is provided on the outer wall of the exhaust pipe. After the tiny particles are separated from the optical lens, they are negatively charged in an electrostatic environment. When they are discharged outward through an exhaust fan, the negatively charged particles are discharged out of the shell by the Lorentz force generated by the magnetic block. At the same time, an electrostatic environment is formed outside the shell. The dust particles are affected by the Lorentz force and fly away from the shell, thereby preventing the dust particles from entering the shell and adhering to the optical lens.

[0009] Preferably, a control box is provided under the platform, a controller is provided in the control box, and the mechanical module, the electrostatic generator and the exhaust fan are all connected to the controller via wires.

[0010] Preferably, the mechanical module includes a first rotating member, which is arranged on a platform, the other end of the first rotating member is connected to a main arm, the other end of the main arm is connected to a second rotating member, the other side of the second rotating member is rotatably connected to a large arm, the other end of the large arm is connected to a third rotating member, the other side of the third rotating member is rotatably connected to a first small arm, the other end of the first small arm is connected to a fourth rotating member, the other side of the fourth rotating member is rotatably connected to a second small arm, the end of the second small arm is connected to a fifth rotating member, the other side of the fifth rotating member is rotatably connected to a fixed rod, a laser emitter is provided on the fixed rod, a camera is provided on one side of the laser emitter, and the camera is connected to a control box.

[0011] Preferably, the support rod has a "7"-shaped structure, a servo motor is connected to a position near the top of the support rod, a pinion is provided on the output shaft of the servo motor, the pinion is meshingly connected to a reduction gear, a bidirectional screw is connected to the center position of one side of the reduction gear, two moving blocks are symmetrically provided on the bidirectional screw, through holes are opened at the center positions of the two moving blocks, the inner side walls of the through holes are provided with internal threads, and the moving blocks are rotatably connected to the bidirectional screw via the internal threads; the two moving blocks can move close to or away from each other on the bidirectional screw.

[0012] Preferably, a slide groove is provided on the top of the support rod, the outer side walls of the two moving blocks are connected with a connecting rod, the other end of the connecting rod is connected with a slider, the slider is arranged in the slide groove, and the slider is matched with the slide groove for sliding connection.

[0013] Preferably, the outer side walls of the two movable blocks away from the connecting rod are rotatably connected to a rotating rod, the other end of the rotating rod is rotatably connected to a fixed block, the side of the fixed block away from the rotating rod is connected to an industrial camera, and a lighting lamp is provided on the outside of the industrial camera lens; the industrial camera is connected to a host computer.

[0014] Preferably, the detection system includes a controller, the controller controls a mechanical module, the mechanical module is provided with a laser emitter and a camera, the laser emitter transmits data to the controller through real-time shooting of the camera, and the controller controls the mechanical module to change the scanning and cleaning position of the laser emitter to achieve complete cleaning of the optical lens area.

[0015] Preferably, the optical lens after cleaning is transmitted to the bottom of the industrial camera, supplemented with light by the lighting module, and the image of the optical lens is captured by the industrial camera, and the image information is transmitted to the host computer. The image is processed by the host computer to identify uncleaned textures and scratches and residual particles on the surface of the optical lens, and the cleanliness of the optical lens is judged to determine whether it meets the cleaning requirements.

[0016] Preferably, the image processing process includes image preprocessing, image extraction, and image classification; the content of image extraction is uncleared texture and scratch residual particles, and image classification is to classify the content of image extraction; image preprocessing includes a normalization processing module, an image sharpening module, a histogram regulation module, and a filtering processing module, image extraction includes an edge detection module and a morphological processing module, and image classification includes a feature parameter selection module and a classifier classification module.

[0017] In addition, when cleaning is performed by a laser transmitter, the following steps are included: step one, firstly, the image information of the optical lens to be cleaned is captured by a camera, the acquired information is transmitted to a controller, the edge of the optical lens to be cleaned is extracted by the controller, and then the image is segmented, and the area planning of the optical lens is processed into a rectangular outline by an envelope planning method in the segmented image, the segmented rectangular outlines are spliced, and repeated image areas are removed to form a complete cleaning area, so as to avoid repeated laser cleaning of the optical lens and reduce the influence of laser heat on the surface of the optical lens; step two, the contour position information determined in step one is transmitted to the mechanical module through the controller, and the mechanical module is controlled by the controller. The movement of the block drives the laser emitter to perform laser cleaning; first determine the moving direction of the laser emitter, move parallel to the direction of the transmission belt or perpendicular to the direction of the transmission belt, and determine the intersection of the partition outline and the scanning wheel line of the laser emitter; step three, determine whether the number of intersections has changed, if it has changed, continue to determine whether the current scan line needs to be used as the partition edge, if the intersection has not changed, record the partition edge line; step four, if the current scan line is used as the partition edge, record the partition edge line, and perform laser scanning according to the determined edge line. After the edge area is laser scanned, the cleaning area within the partition outline is supplemented with a scan to complete the laser scanning and cleaning of the entire optical lens.

[0018] In addition, in order to increase the accuracy of mechanical module control and completely cover the cleaning area of ​​the optical lens, the size of the main arm d1 satisfies, d1=1.5b, the size of the upper arm d2 satisfies, d2=0.6b, the size of the first small arm d3 satisfies, d3=1.1b, the size of the second small arm d4 satisfies, d4=0.9b, and the length l of the fixed rod satisfies l=0.25b; b is a coefficient selected according to the size of the table body; the rotation range of each rotating part satisfies, the range of the first rotating part T1 is 360° in the horizontal plane, the range of the second rotating part T2 is (-2π / 3~5π / 7), the range of the third rotating part T3 is (-5π / 6~2π / 3), the range of the fourth rotating part T4 is (0~3π / 4), and the range of the fifth rotating part T5 is 360° in the rotation plane.

[0019] In addition, in order to prevent the laser from damaging the optical lens, when the power W of the incident laser is greater than or equal to 5W and less than or equal to 10W, the laser scanning speed v satisfies the requirement of greater than or equal to 1300mm / s and less than or equal to 1600mm / s; when the laser power is too large, the surface of the optical lens will be damaged. When the laser power is too small, it is not enough to completely remove the residue on the surface of the optical lens. When the laser scanning speed is too fast, it is not enough to clean the optical lens. When the laser scanning speed is too slow, the high temperature generated by the laser can easily damage the optical lens. In order to improve the cleaning effect and prevent the laser from damaging the lens, the laser power W, scanning speed v and diameter D of the laser spot satisfy the requirement of D=λ·v / (P+f); in the above formula, D is in μm, f is the repetition frequency of the laser pulse, in kHz; λ is the adjustment coefficient, and its value range is 46.73-69.53.

[0020] In addition, after the optical lens is cleaned by laser, it is transmitted to the bottom of the support rod through the conveyor belt, and the focal length of the industrial camera is adjusted by setting a servo motor to inspect the cleaned optical lens. When adjusting, the driving motor drives the pinion to rotate, the pinion drives the reduction gear to rotate, and the reduction gear drives the bidirectional lead screw to rotate. The bidirectional lead screw is rotatably connected to the support rod through the set bearing. When the bidirectional lead screw rotates, the moving block slides relative to the slide groove through the connected slider, and the moving block is relatively displaced on the bidirectional lead screw, thereby changing the angle between the two rotating rods. When the two moving blocks move in a similar direction, the angle between the two rotating rods becomes smaller, and the industrial camera moves downward. When the two moving blocks move in phase, the angle between the two rotating rods becomes larger, driving the industrial camera to move upward, thereby changing the focal length of the industrial camera, which helps to capture images with better clarity and facilitates subsequent processing.

[0021] In the process of detecting the acquired image, the specific method of image extraction is as follows: step one, determine that the target image to be extracted is the uncleared texture and scratch residual particles of the optical lens; step two, preprocess the acquired image, perform edge detection after preprocessing, extract the boundary graphics of the uncleared texture and scratch residual particles, and remove the tiny interference information of the boundary by setting the area threshold method; step three, fill the holes and disconnected boundary gaps inside the acquired graphics, so that the area of ​​uncleared texture and scratch residual particles forms a whole, and use the area threshold method again to remove redundant information, leaving a single complete target defect; step four, finally remove the burrs and protrusions on the edge, smooth it, and obtain a single shape feature; step five, perform threshold classification according to the obtained single shape feature, set the classifier for classification, and finally obtain the optical lens cleanliness data to determine whether the optical lens meets the normal usage requirement standards. In order to verify the accuracy of the detection system, the detection results of 50 optical lenses are as shown in the following table

[0022] type Actual number Number of detections Accuracy Uncleared Texture 25 23 92.00％ Residual particles 59 55 93.22％ Scratches 12 10 83.33％ other 5 4 80.00％

[0023] From the above table, we can see that the accuracy of the detection system = (23 + 55 + 10 + 4) / (25 + 59 + 12 + 5) = 91.08%. From the above, we can see that the accuracy of the cleanliness detection can determine the uncleaned type.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The present invention provides a cleaning system for optical lens equipment, which drives a laser emitter to perform laser scanning cleaning on an optical lens on a conveyor belt through a mechanical module. During the cleaning process, the laser generates plasma to expand the air near the optical lens, generating shock waves, thereby overcoming the adhesion between the particles and the optical lens, causing the particles to separate from the lens to achieve the purpose of cleaning.

[0026] (2) The present invention provides a cleaning system for optical lens equipment. When the exhaust fan is used to discharge the negatively charged particles to the outside of the housing, the particles are discharged due to the Lorentz force generated by the magnetic block. At the same time, an electrostatic environment is formed outside the housing. The particles are affected by the Lorentz force and fly away from the housing, thereby preventing the particles from entering the housing and adhering to the optical lens.

[0027] (3) The present invention provides a cleaning system for optical lens equipment. By using a cleaning method of a laser emitter, repeated image areas are removed to form a complete cleaning area, thereby avoiding repeated laser cleaning of optical lenses, reducing the impact of laser heat on the surface of the optical lens, and improving cleaning efficiency.

[0028] (4) The cleaning system of an optical lens device of the present invention increases the accuracy of mechanical module control by limiting the data of the mechanical module, and can completely cover the cleaning area of ​​the optical lens.

[0029] (5) The cleaning system of an optical lens device of the present invention further improves the cleaning effect and prevents laser damage to the lens by limiting the relationship between the laser power, scanning speed and the diameter of the laser spot.

[0030] (6) The cleaning system of an optical lens device of the present invention obtains optical lens cleanliness data by setting a cleanliness detection method to determine whether the optical lens meets normal usage requirement standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0033] Figure 2 It is a focusing schematic diagram of the detection system of the present invention.

[0034] Figure 3 It is a schematic diagram of the mechanical module structure of the present invention.

[0035] Figure 4 It is a schematic diagram of the mechanical module layout of the present invention.

[0036] Figure 5 It is a schematic diagram of the moving block structure of the present invention.

[0037] Figure 6 It is a block diagram of the cleaning system of the present invention.

[0038] Figure 7 It is an image processing block diagram of the present invention.

[0039] Figure 8 It is the laser transmitter scanning flow chart of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Embodiment 1:

[0043] like Figure 1-5As shown, a cleaning system for optical lens equipment includes a platform 1, a conveyor belt 2 is provided on the upper surface of the platform 1, a rotating wheel is provided under the transmission belt, the rotating wheel is connected to a driving motor, and the driving motor drives the conveyor belt 2 to transmit; a shell 3 is provided above the conveyor belt 2, and the two sides of the lower side of the shell 3 are connected to the platform 1, and the conveyor belt 2 can freely pass under the shell 3, a discharge pipe 5 is provided on the top of the shell 3, and an exhaust fan 6 is provided inside the discharge pipe 5, a mechanical module 4 is provided inside the shell 3, and the bottom of the mechanical module 4 is connected to the platform 1, and a laser emitter 411 is provided on the mechanical module 4, The laser emitter 411 can adjust the angle of the laser emitter 411, and the optical lenses on the conveyor belt 2 are scanned in batches through the laser emitter 411. When the parallel light beam emitted by the laser emitter 411 is captured by the surface of the optical lens, plasma is generated to expand the air near the optical lens, generating a shock wave, overcoming the adhesion between the particles and the optical lens, so that the particles are separated from the lens to achieve the purpose of cleaning; a support rod 10 is provided on the side of the conveyor belt 2 away from the shell 3, and a detection system is provided on the support rod 10 for detecting whether there are uncleared textures and scratches on the surface of the optical lens.

[0044] The inner wall of the shell 3 is provided with an electrostatic generator 7, and the outer wall of the exhaust pipe 5 is provided with a magnetic block 8. After the tiny particles are separated from the optical lens, they are in an electrostatic environment with negative charges. When they are discharged outward through the exhaust fan 6, the negatively charged particles are discharged out of the shell 3 by the Lorentz force generated by the magnetic block 8. At the same time, an electrostatic environment is formed outside the shell 3. The dust particles are affected by the Lorentz force and fly away from the shell 3, thereby preventing the dust particles from entering the shell 3 and adhering to the optical lens.

[0045] A control box 9 is provided below the platform 1 , and a controller is provided in the control box 9 . The mechanical module 4 , the electrostatic generator 7 and the exhaust fan 6 are all connected to the controller via wires.

[0046] The mechanical module 4 includes a first rotating member 41, which is arranged on the platform 1, the other end of the first rotating member 41 is connected to the main arm 42, the other end of the main arm 42 is connected to the second rotating member 43, the other side of the second rotating member 43 is rotatably connected to the upper arm 44, the other end of the upper arm 44 is connected to the third rotating member 45, the other side of the third rotating member 45 is rotatably connected to the first small arm 46, the other end of the first small arm 46 is connected to the fourth rotating member 47, the other side of the fourth rotating member 47 is rotatably connected to the second small arm 48, the end of the second small arm 48 is connected to the fifth rotating member 49, the other side of the fifth rotating member 49 is rotatably connected to the fixed rod 410, the fixed rod 410 is provided with a laser emitter 411, one side of the laser emitter 411 is provided with a camera 412, and the camera 412 is connected to the control box 9.

[0047] The support rod 10 has a "7"-shaped structure, and a servo motor 11 is connected to a position near the top of the support rod 10. A pinion 12 is provided on the output shaft of the servo motor 11, and the pinion 12 is meshingly connected to a reduction gear 13. A bidirectional screw rod 14 is connected to the center position of one side of the reduction gear 13. Two moving blocks 15 are symmetrically provided on the bidirectional screw rod 14, and a through hole 151 is opened at the center position of the two moving blocks 15. The inner side wall of the through hole 151 is provided with an internal thread 152, and the moving block 15 is rotatably connected to the bidirectional screw rod 14 through the internal thread 152; the two moving blocks 15 can make close or separate movements on the bidirectional screw rod 14.

[0048] A slide groove 16 is provided on the top of the support rod 10, and the outer side walls of the two moving blocks 15 are connected with a connecting rod 17. The other end of the connecting rod 17 is connected with a slider 18, and the slider 18 is arranged in the slide groove 16, and the slider 18 is matched with the slide groove 16 for sliding connection.

[0049] The outer side walls of the two movable blocks 15 away from the connecting rod 17 are rotatably connected to a rotating rod 19, and the other end of the rotating rod 19 is rotatably connected to a fixed block 20. The side of the fixed block 20 away from the rotating rod 19 is connected to an industrial camera 21, and a lighting lamp 22 is provided on the outside of the lens of the industrial camera 21; the industrial camera 21 is connected to a host computer.

[0050] Embodiment 2:

[0051] like Figure 6-8 As shown, on the basis of embodiment 1, the detection system includes a controller, and the controller controls a mechanical module 4. The mechanical module 4 is provided with a laser emitter 411 and a camera 412. The laser emitter 411 transmits data to the controller through real-time shooting of the camera 412. The controller controls the mechanical module 4 to change the scanning and cleaning position of the laser emitter 411 to achieve complete cleaning of the optical lens area.

[0052] The cleaned optical lens is transmitted to the bottom of the industrial camera 21, supplemented with light by the lighting module, and the image of the optical lens is captured by the industrial camera 21. The image information is transmitted to the host computer, and the image is processed by the host computer to identify the uncleaned texture and scratches and residual particles on the surface of the optical lens, judge the cleanliness of the optical lens, and determine whether it meets the cleaning requirements.

[0053] The image processing process includes image preprocessing, image extraction, and image classification; the content of image extraction is uncleared texture and scratch residual particles, and image classification is to classify the content of image extraction; image preprocessing includes normalization processing module, image sharpening module, histogram regulation module, and filtering processing module, image extraction includes edge detection module and morphological processing module, and image classification includes feature parameter selection module and classifier classification module.

[0054] Embodiment 3

[0055] On the basis of the first embodiment, when cleaning is performed by the laser emitter 411, the following steps are included: step 1, firstly, the image information of the optical lens to be cleaned is captured by the camera 412, and the acquired information is transmitted to the controller, and the edge of the optical lens to be cleaned is extracted by the controller, and then the image is segmented, and the area planning of the optical lens is processed into a rectangular outline by the envelope planning method in the segmented image, and the segmented rectangular outlines are spliced ​​to remove the repeated image areas to form a complete cleaning area, so as to avoid repeated laser cleaning of the optical lens and reduce the influence of laser heat on the surface of the optical lens; step 2, the contour position information determined in step 1 is transmitted to the mechanical module 4 through the controller, and the mechanical module 4 is controlled by the controller. The movement of the control module drives the laser emitter 411 to perform laser cleaning; first determine the moving direction of the laser emitter 411, move in the direction parallel to the transmission belt or move in the direction perpendicular to the conveyor belt 2, and determine the intersection of the partition outline and the scanning wheel line of the laser emitter 411; step three, determine whether the number of intersections has changed, if it has changed, continue to determine whether the current scan line needs to be used as the partition edge, if the intersection has not changed, record the partition edge line; step four, if the current scan line is used as the partition edge, record the partition edge line, and perform laser scanning according to the determined edge line. After the edge area is laser scanned, the cleaning area within the partition outline is supplemented with a scan to complete the laser scanning and cleaning of the entire optical lens.

[0056] In order to increase the accuracy of control of the mechanical module 4 and to completely cover the cleaning area of ​​the optical lens, the size of the main arm 42d1 satisfies, d1=1.5b, the size of the upper arm 44d2 satisfies, d2=0.6b, the size of the first small arm 46d3 satisfies, d3=1.1b, the size of the second small arm 48d4 satisfies, d4=0.9b, the length l of the fixed rod 410 satisfies l=0.25b; b is a coefficient selected according to the size of the platform 1; the rotation stroke range of each rotating member satisfies, the stroke range of the first rotating member 41T1 is 360° in the horizontal plane, the stroke range of the second rotating member 43T2 is (-2π / 3~5π / 7), the stroke range of the third rotating member 45T3 is (-5π / 6~2π / 3), the stroke range of the fourth rotating member 47T4 is (0~3π / 4), and the stroke range of the fifth rotating member 49T5 is 360° in the rotation plane.

[0057] In order to prevent the laser from damaging the optical lens, when the power W of the incident laser is greater than or equal to 5W and less than or equal to 10W, the laser scanning speed v satisfies the requirement of greater than or equal to 1300mm / s and less than or equal to 1600mm / s; when the laser power is too large, the surface of the optical lens will be damaged, and when the laser power is too small, it will not be enough to completely remove the residue on the surface of the optical lens; when the laser scanning speed is too fast, it will not be enough to clean the optical lens, and when the laser scanning speed is too slow, the high temperature generated by the laser will easily damage the optical lens; in order to improve the cleaning effect and prevent the laser from damaging the lens, the laser power W, scanning speed v and diameter D of the laser spot satisfy the requirement of D=λ·v / (P+f); in the above formula, D is in μm, f is the repetition frequency of the laser pulse, in kHz; λ is the adjustment coefficient, and the value range is 46.73-69.53.

[0058] Embodiment 4

[0059] On the basis of the first embodiment, after the optical lens is cleaned by laser, it is transmitted to the bottom of the support rod 10 through the conveyor belt 2, and the focal length of the industrial camera 21 is adjusted by setting the servo motor 11 to detect the cleaned optical lens. When adjusting, the driving motor drives the pinion 12 to rotate, the pinion 12 drives the reduction gear 13 to rotate, and the reduction gear 13 drives the bidirectional screw 14 to rotate. The bidirectional screw 14 is rotatably connected with the support rod 10 through the set bearing. When the bidirectional screw 14 rotates, the moving block 15 slides relative to the slide groove 16 through the connected slider 18, and the moving block 15 is relatively displaced on the bidirectional screw 14, thereby changing the angle between the two rotating rods 19. When the two moving blocks 15 move similarly, the angle between the two rotating rods 19 becomes smaller, and the industrial camera 21 moves downward. When the two moving blocks 15 move in phase, the angle between the two rotating rods 19 becomes larger, driving the industrial camera 21 to move upward, thereby changing the focal length of the industrial camera 21, which helps to capture images with better clarity and facilitates subsequent processing.

[0060] In the process of detecting the acquired image, the specific method of image extraction is as follows: step one, determine that the target image to be extracted is the uncleared texture and scratch residual particles of the optical lens; step two, preprocess the acquired image, perform edge detection after preprocessing, extract the boundary graphics of the uncleared texture and scratch residual particles, and remove the tiny interference information of the boundary by setting the area threshold method; step three, fill the holes and disconnected boundary gaps inside the acquired graphics, so that the area of ​​uncleared texture and scratch residual particles forms a whole, and use the area threshold method again to remove redundant information, leaving a single complete target defect; step four, finally remove the burrs and protrusions on the edge, smooth it, and obtain a single shape feature; step five, perform threshold classification according to the obtained single shape feature, set the classifier for classification, and finally obtain the optical lens cleanliness data to determine whether the optical lens meets the normal usage requirement standards. In order to verify the accuracy of the detection system, the detection results of 50 optical lenses are as shown in the following table

[0061] type Actual number Number of detections Accuracy Uncleared Texture 25 23 92.00％ Residual particles 59 55 93.22％ Scratches 12 10 83.33％ other 5 4 80.00％

[0062] From the above table, we can see that the accuracy of the detection system = (23 + 55 + 10 + 4) / (25 + 59 + 12 + 5) = 91.08%. From the above, we can see that the accuracy of the cleanliness detection can determine the uncleaned type.

[0063] The device obtained by the above technical solution is a cleaning system for optical lens equipment. The mechanical module is set to drive the laser emitter to perform laser scanning cleaning on the optical lens on the conveyor belt. During the cleaning process, the laser generates plasma to expand the air near the optical lens, generate shock waves, overcome the adhesion between the particles and the optical lens, and separate them from the lens to achieve the purpose of cleaning. When discharged outward by the exhaust fan, the particles with negative charge are discharged out of the shell by the Lorentz force generated by the magnetic block, and at the same time, an electrostatic environment is formed outside the shell. The particle dust is affected by the Lorentz force and flies away from the shell, preventing the particle dust from entering the shell and adhering to the optical lens. Through the cleaning method of the laser emitter, the repeated image area is removed to form a complete cleaning area, avoiding repeated laser cleaning of the optical lens, reducing the influence of laser heat on the surface of the optical lens; and improving the cleaning efficiency. By limiting the data of the mechanical module, the accuracy of the mechanical module control is increased, and the cleaning area of ​​the optical lens can be completely covered. By limiting the relationship between the laser power, scanning speed and the diameter of the laser spot, the cleaning effect is further improved to prevent laser damage to the lens. By setting the cleanliness detection method, the cleanliness data of the optical lens is obtained to determine whether the optical lens meets the normal usage requirement standards.

[0064] Other technical solutions not elaborated in detail in the present invention are all existing technologies in the field and will not be described in detail here.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cleaning system for an optical lens device, characterized in that: The invention comprises a platform (1), wherein a conveyor belt (2) is provided on the upper surface of the platform (1), a rotating wheel is provided below the transmission belt, the rotating wheel is connected to a driving motor, and the driving motor drives the conveyor belt (2) to transmit; a shell (3) is provided above the conveyor belt (2), the two sides below the shell (3) are connected to the platform (1), the conveyor belt (2) can freely pass through the bottom of the shell (3), a discharge pipe (5) is provided on the top of the shell (3), an exhaust fan (6) is provided inside the discharge pipe (5), a mechanical module (4) is provided inside the shell (3), the bottom of the mechanical module (4) is connected to the platform (1), and a laser emitter (411) is provided on the mechanical module (4). ), the laser emitter (411) can adjust the angle of the laser emitter (411), and the optical lenses on the conveyor belt (2) are scanned in batches by the laser emitter (411). When the parallel light beam emitted by the laser emitter (411) is captured by the surface of the optical lens, plasma is generated to expand the air near the optical lens, thereby generating a shock wave, overcoming the adhesion between the particles and the optical lens, so that the particles are separated from the lens to achieve the purpose of cleaning; a support rod (10) is provided on the side of the conveyor belt (2) away from the housing (3), and a detection system is provided on the support rod (10) for detecting whether there are residual particles with uncleared textures and scratches on the surface of the optical lens; The inner wall of the shell (3) is provided with an electrostatic generator (7), and the outer wall of the discharge pipe (5) is provided with a magnetic block (8). After the tiny particles are separated from the optical lens, they are placed in an electrostatic environment and carry negative charges. When discharged outwards through the exhaust fan (6), the particles carrying the negative charges are discharged out of the shell (3) by the Lorentz force generated by the magnetic block (8), and at the same time, an electrostatic environment is formed outside the shell (3). The particles are acted on by the Lorentz force and fly away from the shell (3), thereby preventing the particles from entering the shell (3) and adhering to the optical lens; A control box (9) is provided below the platform (1), a controller is provided in the control box (9), and the mechanical module (4), the electrostatic generator (7) and the exhaust fan (6) are all connected to the controller via wires.

2. The cleaning system of an optical lens device according to claim 1, characterized in that: The mechanical module (4) comprises a first rotating member (41), the first rotating member (41) being arranged on a platform (1), the other end of the first rotating member (41) being connected to a main arm (42), the other end of the main arm (42) being connected to a second rotating member (43), the other side of the second rotating member (43) being rotatably connected to a large arm (44), the other end of the large arm (44) being connected to a third rotating member (45), the other side of the third rotating member (45) being rotatably connected to a first small arm (46), the other end of the first small arm (46) being connected to a fourth rotating member (47), the other side of the fourth rotating member (47) being rotatably connected to a second small arm (48), the end of the second small arm (48) being connected to a fifth rotating member (49), the other side of the fifth rotating member (49) being rotatably connected to a fixed rod (410), the fixed rod (410) being provided with a laser emitter (411), one side of the laser emitter (411) being provided with a camera (412), the camera (412) being connected to a control box (9).

3. The cleaning system of an optical lens device according to claim 1, characterized in that: The support rod (10) has a "7"-shaped structure. A servo motor (11) is connected to a position near the top of the support rod (10). A pinion gear (12) is provided on the output shaft of the servo motor (11). The pinion gear (12) is meshingly connected to a reduction gear (13). A bidirectional screw rod (14) is connected to the center position of one side of the reduction gear (13). Two moving blocks (15) are symmetrically provided on the bidirectional screw rod (14). A through hole (151) is provided at the center position of the two moving blocks (15). An internal thread (152) is provided on the inner side wall of the through hole (151). The moving blocks (15) are rotatably connected to the bidirectional screw rod (14) via the internal thread (152). The two moving blocks (15) can move toward or away from each other on the bidirectional screw rod (14).

4. The cleaning system for optical lens equipment according to claim 3, characterized in that: A slide groove (16) is provided at the top of the support rod (10); the outer side walls of the two moving blocks (15) are connected to connecting rods (17); the other end of the connecting rod (17) is connected to a sliding block (18); the sliding block (18) is arranged in the slide groove (16); the sliding block (18) and the slide groove (16) are matched and slidably connected.

5. The cleaning system of an optical lens device according to claim 4, characterized in that: The outer side walls of the two movable blocks (15) away from the connecting rod (17) are both rotatably connected to a rotating rod (19), the other end of the rotating rod (19) is rotatably connected to a fixed block (20), the side of the fixed block (20) away from the rotating rod (19) is connected to an industrial camera (21), and an illuminating lamp (22) is provided on the outer side of a lens of the industrial camera (21); the industrial camera (21) is connected to a host computer.

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