An ultrasonic cleaning method and system for optical lenses

Abstract

The application discloses a kind of ultrasonic cleaning method and system for optical lens, and the ultrasonic cleaning method for optical lens includes adding organic solvent cleaning solution in the box of cleaning device;The lens is fixed in clamping unit in horizontal state, make the clamping unit spin, make the lens change into vertical state;Open ultrasonic generator, make the clamping unit revolve at first rotational speed V1, carry out early cleaning;Make the clamping unit revolve at second rotational speed V2, simultaneously make the clamping unit spin at third rotational speed V3, carry out middle cleaning;The lens is changed into vertical state again, make the clamping unit revolve at first rotational speed V1, carry out later cleaning.The method and system of the application can clamp optical lens by clamping piece, effectively prevent the mutual collision of optical lens in the cleaning process, by the setting of rotating unit, can fully agitate cleaning liquid, increase cleaning efficiency.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic cleaning technology, and in particular to an ultrasonic cleaning method and system for optical lenses. Background Technology

[0002] Currently, the localization rate of concentrated solar power (CSP) equipment in China has reached over 90%, and the CSP industry chain is gradually taking shape, laying the foundation for large-scale promotion in China. At present, many domestic CSP companies are continuously developing energy-efficient and high-performance CSP products.

[0003] In the research and development of photothermal lens assemblies, precise testing equipment is needed to monitor their slope and surface shape errors. Optical lenses are precision components, and after a period of use, their surfaces accumulate contaminants. Currently, the common method is to immerse the optical lenses in an ultrasonic cleaning agent and then activate an ultrasonic generator for cleaning. Due to the radiation of the ultrasonic waves, tiny bubbles in the liquid within the tank can maintain vibration under the action of the sound waves, breaking the adhesion between the contaminants and the surface of the optical lens, causing fatigue damage to the contaminant layer and its removal. The vibration of the gas bubbles also scrubs the solid surface. However, in the above cleaning process, the cleaning agent in the tank has poor fluidity. After the adsorption capacity of the contaminants on the surface of the optical lens is destroyed, the rate at which the contaminants detach from the optical lens is slow, thus affecting the overall ultrasonic cleaning efficiency. Furthermore, the cleaning machine lacks a device to fix the optical lenses, which can easily cause the optical lenses to collide with each other, resulting in scratches on their surfaces. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing ultrasonic cleaning methods for optical lenses, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is how to provide an ultrasonic cleaning method for optical lenses, so as to solve the problems of slow cleaning efficiency and poor effect in the cleaning of optical lenses in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an ultrasonic cleaning method for optical lenses, comprising the following steps: S1, adding organic solvent cleaning solution to the inner chamber of the cleaning device; S2, fixing the lens in a horizontal state to the clamping unit, and causing the clamping unit to rotate to make the lens vertical; S3, turning on the ultrasonic generator, causing the clamping unit to revolve at a first rotational speed V1 for preliminary cleaning; S4, causing the clamping unit to revolve at a second rotational speed V2, and simultaneously causing the clamping unit to rotate at a third rotational speed V3 for intermediate cleaning; S5, turning the lens back to a vertical state, and causing the clamping unit to revolve at the first rotational speed V1 for final cleaning; S6, turning off the ultrasonic generator, turning the lens back to a horizontal state to complete the first cleaning; S7, draining the organic solvent cleaning solution, and sequentially adding alkaline cleaning solution, acidic cleaning solution, and pure water to the inner chamber, repeating the above steps to perform the second, third, and fourth cleaning.

[0008] In a preferred embodiment of the ultrasonic cleaning method for optical lenses described in this invention, the clamping unit is connected to the rotating unit, the clamping unit includes a first rotating shaft, the clamping unit is capable of rotating relative to the first rotating shaft, the rotating unit includes a second rotating shaft, the clamping unit is capable of revolving relative to the second rotating shaft, and the clamping unit can maintain a constant angle during the revolution.

[0009] In a preferred embodiment of the ultrasonic cleaning method for optical lenses described in this invention, when adding cleaning fluid to the inner chamber of the cleaning device, the level of the cleaning fluid meets the following requirements. h2≤h1≤0.7(h2+r1) In the formula, h1 is the liquid level of the cleaning fluid, h2 is the height of the second rotating shaft, and r1 is the rotation radius of the clamping unit when it revolves.

[0010] In a preferred embodiment of the ultrasonic cleaning method and system for optical lenses described in this invention, the first rotational speed V1, the second rotational speed V2, and the third rotational speed V3 satisfy the following requirements. 30 r / min ≤ V1 ≤ 40 r / min; 10 r / min ≤ V2 ≤ 15 r / min; 60r / min≤V3≤120r / min.

[0011] Another objective of this invention is to provide an ultrasonic cleaning system for optical lenses, which can employ an ultrasonic cleaning method for optical lenses to solve the problems of slow cleaning efficiency and poor cleaning effect in the prior art.

[0012] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an ultrasonic cleaning system for optical lenses, comprising: a cleaning unit including an inner housing, an outer housing, and an ultrasonic component, wherein a sandwich layer is provided between the inner housing and the outer housing; the ultrasonic component including an ultrasonic generator disposed within the sandwich layer and a transducer disposed at the bottom of the inner housing; and a rotating unit including a fixed shaft fixed to the inner sidewalls of the two outer housings, a first rotating rod sleeved on the fixed shaft, a second rotating rod sleeved on the first rotating rod, a first gear fixed to the end of the first rotating rod, a rotating component disposed at the end of the second rotating rod and cooperating with the first gear, a first driving component driving the first rotating rod to rotate, and a second driving component driving the second rotating rod to rotate; the first driving component including a worm gear disposed at the end of the first rotating rod, a worm cooperating with the worm gear, and a first motor driving the worm to rotate. A motor is fixed to the side wall of the outer casing. The second driving component includes a fifth gear disposed at the end of the second rotating rod, a sixth gear meshing with the fifth gear, and a second motor driving the sixth gear to rotate. A clamping unit is disposed between the two rotating components and includes a support frame, a clamping component slidingly engaged with the support frame, a threaded rod threadedly engaged with the clamping component, a second gear fixedly connected to the end of the threaded rod, a synchronous belt connecting the two second gears, a third motor driving the threaded rod to rotate, and a motor housing connected to the support frame, the third motor being disposed within the motor housing. A control unit includes a first angular velocity sensor for measuring the rotational speed of the clamping unit, a second angular velocity sensor for measuring the revolution speed of the clamping unit, a liquid level sensor for monitoring the liquid level of the cleaning fluid in the inner casing, a PLC controller for controlling the first motor, the second motor, and the third motor, and a display screen for display.

[0013] As a preferred embodiment of the ultrasonic cleaning method and system for optical lenses described in this invention, the rotating component includes a turntable disposed at the end of the second rotating rod, a connecting rod fixed to the side of the turntable, and a third gear and a fourth gear rotatably engaged with the same connecting rod. The third gear meshes with the first gear, and the fourth gear meshes with the third gear. A plurality of connecting rods are disposed at equal angles on the turntable. The diameters of the first gear, the third gear, and the fourth gear are all equal, and the number of teeth is the same.

[0014] As a preferred embodiment of the ultrasonic cleaning method and system for optical lenses described in this invention, the supporting frame is fixed on the fourth gear, and the supporting frame is provided with first sliding grooves at both ends. The clamping member includes a sliding block disposed in the first sliding groove, a supporting plate disposed between two sliding blocks, a clamping plate that slides with the supporting plate, and a spring that cooperates with the clamping plate.

[0015] As a preferred embodiment of the ultrasonic cleaning method and system for optical lenses described in this invention, the carrier plate is provided with a plurality of second sliding grooves, one end of the clamping plate is disposed in the second sliding groove, and the spring is disposed between the clamping plate and the inner sidewall of the second sliding groove.

[0016] In a preferred embodiment of the ultrasonic cleaning method and system for optical lenses described in this invention, two clamping members are symmetrically arranged, the threaded rod is provided with two threaded grooves with opposite directions, and the sliding block is threadedly engaged with the threaded rod.

[0017] As a preferred embodiment of the ultrasonic cleaning method and system for optical lenses described in this invention, the clamping unit further includes a placement plate disposed at the bottom of the support plate, a support rod is disposed on the support frame, a third sliding groove is disposed on the support rod, a limiting block that cooperates with the third sliding groove is disposed at the bottom of the placement plate, and a limiting protrusion is disposed on the side wall of the third sliding groove.

[0018] The beneficial effects of this invention are as follows: the clamping member can clamp the optical lens, effectively preventing the optical lens from colliding with each other during the cleaning process; the rotating unit can fully agitate the cleaning fluid, increasing the cleaning efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a flowchart of the ultrasonic cleaning method for optical lenses in Example 1.

[0020] Figure 2 This is a schematic diagram of the control unit of the ultrasonic cleaning system for optical lenses in Example 3.

[0021] Figure 3 This is a structural diagram of the ultrasonic cleaning system for optical lenses in Example 3.

[0022] Figure 4This is a schematic diagram showing the positions of the first and second drive components in the ultrasonic cleaning system for optical lenses in Example 3.

[0023] Figure 5 This is a structural diagram of the rotating unit and clamping unit of the ultrasonic cleaning system for optical lenses in Example 3.

[0024] Figure 6 This is a partial rotating unit structure diagram of the ultrasonic cleaning system for optical lenses in Example 3.

[0025] Figure 7 This is a structural diagram of the clamping unit of the ultrasonic cleaning system for optical lenses in Example 3.

[0026] Figure 8 This is an exploded view of the clamping unit of the ultrasonic cleaning system for optical lenses in Example 3.

[0027] Figure 9 This is a structural diagram of the clamping component of the ultrasonic cleaning system for optical lenses in Example 3.

[0028] Figure 10 This is a schematic diagram of the placement plate and limiting protrusion of the ultrasonic cleaning system for optical lenses in Example 3.

[0029] Figure 11 This is a structural diagram of the support rod and limiting protrusion of the ultrasonic cleaning system for optical lenses in Example 3. Detailed Implementation

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0033] Example 1 Reference Figure 1This is the first embodiment of the present invention, which provides an ultrasonic cleaning method for optical lenses. The ultrasonic cleaning method for optical lenses includes the following steps: S1. Add an organic solvent cleaning solution to the inner chamber 101 of the cleaning device. The organic solvent cleaning solution is one or more of chlorinated hydrocarbons, fluorinated hydrocarbons, bromine hydrocarbons, alcohols, organosilicon oils, and terpenoids.

[0034] S2. Fix the lens in a horizontal position to the clamping unit 300, and make the clamping unit 300 rotate to make the lens change to a vertical position.

[0035] S3. Turn on the ultrasonic generator and make the clamping unit 300 revolve at the first speed V1 to perform the initial cleaning.

[0036] S4. The clamping unit 300 is made to revolve at the second speed V2, and at the same time, the clamping unit 300 is made to rotate at the third speed V3 to perform mid-term cleaning.

[0037] S5. Reposition the lens back to a vertical position and allow the clamping unit 300 to revolve at the first rotation speed V1 for subsequent cleaning.

[0038] S6. Turn off the ultrasonic generator and return the lens to a horizontal position to complete the first cleaning.

[0039] S7. Drain the organic solvent cleaning solution, and add alkaline cleaning solution, acidic cleaning solution, and pure water to the inner tank 101 in sequence. Repeat the above steps to perform the second, third, and fourth cleaning. That is, after draining the organic solvent cleaning solution, add alkaline cleaning solution to the inner tank 101 and repeat steps S2 to S6 to complete the second cleaning. Then drain the alkaline cleaning solution and add acidic cleaning solution to the inner tank 101. Repeat steps S2 to S6 to complete the third cleaning. Finally, drain the acidic cleaning solution and add pure water to the inner tank 101. Repeat steps S2 to S6 to complete the fourth cleaning. The alkaline cleaning solution is one of sodium hydroxide or potassium hydroxide, and the acidic cleaning solution is one of nitric acid or hydrochloric acid.

[0040] Furthermore, the clamping unit 300 is connected to the rotating unit 200. The clamping unit 300 includes a first rotating shaft M and is capable of rotating relative to the first rotating shaft M. The rotating unit 200 includes a second rotating shaft N and is capable of revolving relative to the second rotating shaft N. The clamping unit 300 can maintain a constant angle during its revolution.

[0041] Preferably, when adding cleaning fluid to the inner tank 101 of the cleaning device, the level of the cleaning fluid meets the following requirements: h2≤h1≤0.7(h2+r1) In the formula, h1 is the liquid level of the cleaning fluid, h2 is the height of the second rotating shaft N, and r1 is the rotation radius of the clamping unit when it revolves 300 revolutions. Furthermore, the first rotational speed V1, the second rotational speed V2, and the third rotational speed V3 satisfy the following requirements: 30 r / min ≤ V1 ≤ 40 r / min; 10 r / min ≤ V2 ≤ 15 r / min; 60r / min≤V3≤120r / min.

[0042] It should be noted that the initial cleaning time is generally 2-4 minutes, the intermediate cleaning time is generally 5-10 minutes, and the final cleaning time is generally 2-4 minutes.

[0043] Example 2 This is the second embodiment of the present invention. In this embodiment, the method of the present invention is specifically tested. Under the same pre-set experimental environment, this embodiment verifies the existing conventional method and the method of the present invention respectively. The proportion of residue on the lens after cleaning is detected. After cleaning, the amount of residue on the cylindrical surface of each lens is observed and recorded under a 10x microscope. The specific experimental results are shown in Table 1.

[0044] Table 1. Record of Residue Amount and Cleaning Time It should be noted that in Table 1, Traditional Method 1 involves simply placing the optical lens inside the cleaning device without any rotation or revolution, and only turning on the ultrasonic generator. The cleaning time for each of the organic solvent cleaning solution, alkaline cleaning solution, acidic cleaning solution, and pure water is 10 minutes. 80 minutes refers to two rounds of cleaning, 120 minutes to three rounds, and 160 minutes to four rounds. Traditional Method 2 uses a cleaning method based on a small-sized optical lens ultrasonic non-destructive cleaning system as described in Chinese Patent Application No. 2021216964835. The cleaning time for each of the organic solvent cleaning solution, alkaline cleaning solution, acidic cleaning solution, and pure water is 10 minutes, and the lens is rotated during the cleaning process. In the method of this invention, the initial cleaning time is 2.5 minutes, the intermediate cleaning time is 5 minutes, and the final cleaning time is 2.5 minutes.

[0045] As shown in Table 1, in traditional method 1, the cleaning effect of one round of cleaning and four rounds of cleaning is not significantly different, with residues exceeding 20%. This is because ultrasonic vibration alone cannot clean optical lenses thoroughly, leaving many difficult-to-remove substances on the lenses. Continuous impact and wiping between the lens and the cleaning solution are necessary for removal. Traditional method 2 shows a significantly better cleaning effect than traditional method 1, but the residue is still above 15%. This is because the rotation method in traditional method 2 is too simplistic; it only continuously impacts the front of the lens with the cleaning solution but fails to achieve the effect of wiping or water dripping off the lens, leaving many residual contaminants. The method described in this invention, however, impacts both the front and back of the lens with water simultaneously and also ejects the cleaning solution after the lens is removed, utilizing the adsorption force of water droplets to remove the dirt adhering to the lens, resulting in a better cleaning effect.

[0046] Example 3 Reference Figures 2-11 This is the third embodiment of the present invention, which differs from the previous two embodiments in that: the embodiment provides an ultrasonic cleaning system for optical lenses, which can perfectly use the ultrasonic cleaning method for optical lenses described in Embodiment 1. The ultrasonic cleaning system for optical lenses includes a cleaning unit 100, a rotating unit 200, a clamping unit 300, and a control unit 400. The clamping unit 300 is used to clamp the optical lens, the rotating unit 200 is used to drive the optical lens to rotate, and the cleaning unit 100 is used to clean the optical lens.

[0047] Specifically, the cleaning unit 100 includes an inner housing 101, an outer housing 102, and an ultrasonic component 103. A sandwich layer A is provided between the inner housing 101 and the outer housing 102. The ultrasonic component 103 includes an ultrasonic generator 103a disposed in the sandwich layer A and a transducer 103b disposed at the bottom of the inner housing 101. The ultrasonic generator 103a and the transducer 103b can adopt existing technology and are mainly used to generate ultrasonic vibrations.

[0048] The rotating unit 200 includes a fixed shaft 201 fixed to the inner sidewalls of the two outer housings 102, a first rotating rod 202 sleeved on the fixed shaft 201, a second rotating rod 203 sleeved on the first rotating rod 202, a first gear 204 fixed to the end of the first rotating rod 202, a rotating component 205 disposed at the end of the second rotating rod 203 and cooperating with the first gear 204, a first driving component 206 driving the first rotating rod 202 to rotate, and a second driving component 207 driving the second rotating rod 203 to rotate.

[0049] The clamping unit 300 is disposed between two rotating parts 205 and includes a support frame 301, a clamping part 302 that slides with the support frame 301, a threaded rod 303 that is threaded with the clamping part 302, a second gear 304 that is fixedly connected to the end of the threaded rod 303, a synchronous belt 305 that connects the two second gears 304, a third motor 306 that drives the threaded rod 303 to rotate, and a motor housing 307 connected to the support frame 301. The third motor 306 is disposed inside the motor housing 307.

[0050] The control unit 400 includes a first angular velocity sensor 401 for measuring the rotational speed of the clamping unit 300, a second angular velocity sensor 402 for measuring the revolution speed of the clamping unit 300, a level sensor 403 for monitoring the liquid level of the cleaning fluid in the inner housing 101, a PLC controller 404 for controlling the first motor 206c, the second motor 207c, and the third motor 306, and a display screen 405 for display. In this embodiment, the display screen 405 is a touch-sensitive display screen.

[0051] Furthermore, the rotating component 205 includes a turntable 205a disposed at the end of the second rotating rod 203, a connecting rod 205b fixed to the side of the turntable 205a, and a third gear 205c and a fourth gear 205d rotatably engaged with the same connecting rod 205b. The third gear 205c meshes with the first gear 204, and the fourth gear 205d meshes with the third gear 205c. Multiple connecting rods 205b are arranged at equal angles on the turntable 205a. The diameters of the first gear 204, the third gear 205c, and the fourth gear 205d are all equal, and the number of teeth is also the same. In this state, the second rotating rod... The rotation of 203 will cause the third gear 205c and the fourth gear 205d to revolve around the first gear 204. If the first gear 204 remains fixed, the third gear 205c and the fourth gear 205d will rotate on their own axis while revolving around the first gear. The angle of the support frame 301 connected to the fourth gear 205d will remain unchanged. That is, if the support frame 301 is horizontal in the initial state, it will remain horizontal during the rotation. The support frame 301 will only rotate on its own axis when the first gear 204 rotates, that is, change from the horizontal state to other states.

[0052] Preferably, the support frame 301 is fixed on the fourth gear 205d. The support frame 301 has first sliding grooves 301a at both ends. The clamping member 302 includes sliding blocks 302a disposed within the first sliding grooves 301a, a support plate 302b disposed between two sliding blocks 302a, a clamping plate 302c slidably engaged with the support plate 302b, and a spring 302d engaging with the clamping plate 302c. The support plate 302b has multiple second sliding grooves 302b-1. One end of the clamping plate 302c is disposed within a second sliding groove 302b-1, and the spring 302d is disposed between the clamping plate 302c and the inner sidewalls of the second sliding grooves 302b-1.

[0053] Furthermore, there are two symmetrically arranged clamping members 302, and the threaded rod 303 is provided with two threaded grooves 303a with opposite directions of rotation. The sliding block 302a is threadedly engaged with the threaded rod 303.

[0054] In this embodiment, the clamping unit 300 further includes a placement plate 308 disposed at the bottom of the support plate 302b, a support rod 301b disposed on the support frame 301, the support rod 301b being disposed between two second slide grooves 302b-1, a third slide groove 301b-1 disposed on the support rod 301b, and a limiting block 308a cooperating with the third slide groove 301b-1 disposed at the bottom of the placement plate 308. Furthermore, a limiting protrusion 301b-2 is provided on the side wall of the third slide groove 301b-1, and the corner of the limiting block 308a is an arc surface. It should be noted that the limiting protrusion 301b-2 mainly serves to increase the friction. For ease of description, the two ends of the third slide groove 301b-1 are named the X end and the Y end. When one end of the limiting block 308a contacts the X end, the placement plate 308 moves away from the two clamping plates 302c. At this time, if the clamping plates 302c hold the optical lens, the placement plate 308 will be positioned on the side of the optical lens and will not obstruct the optical lens. When one end of the limiting block 308a contacts the Y end, the placement plate 308 is positioned directly below the clamping plates 302c. At this time, the placement plate 308 serves to support the optical lens. In this state, it is convenient to place the optical lenses one by one between the two clamping plates 302c, and then clamp the optical lenses by tightening the two supporting plates 302b. The limiting protrusion 301b-2 is designed to increase the difficulty for the limiting block 308a to leave the Y end. Therefore, when one end of the limiting block 308a is in contact with the Y end, the limiting protrusion 301b-2 is located at the other end of the limiting block 308a. It should be noted that the placement plate 308 has a certain weight. When the placement plate 308 has a large angle with the horizontal direction or even turns into a vertical state, it can overcome the resistance increased by the limiting protrusion 301b-2, so that the limiting block 308a changes from contact with the Y end to contact with the X end.

[0055] Furthermore, the first driving component 206 includes a worm gear 206a disposed at the end of the first rotating rod 202, a worm 206b cooperating with the worm gear 206a, and a first motor 206c driving the worm 206b to rotate. The first motor 206c is fixed to the side wall of the outer housing 102. The second driving component 207 includes a fifth gear 207a disposed at the end of the second rotating rod 203, a sixth gear 207b meshing with the fifth gear 207a, and a second motor 207c driving the sixth gear 207b to rotate.

[0056] Preferably, the contact surface between the clamp 302c and the optical lens is arc-shaped, which facilitates clamping the optical lens.

[0057] For ease of understanding, we define the initial state as the horizontal state of the supporting frame 301, with the limiting block 308a in contact with the Y end. At this time, the supporting frame 301 rotates clockwise, changing from a horizontal state to an inverted vertical state. The limiting block 308a is still in contact with the Y end. When the supporting frame 301 rotates counterclockwise in the initial state, it changes from a horizontal state to a vertical state. At this time, the limiting block 308a overcomes the resistance of the limiting protrusion 301b-2 under the action of gravity and contacts the X end.

[0058] In summary, the cleaning system for optical lenses described in this invention has the following two usage states: 1. Picking and placing state: In this state, each carrier frame 301 is in the initial state, and the placement plate 308 is set directly below the clamping plate 302c. The threaded rod 303 is driven to rotate by the third motor 306, so that the carrier plate 302b moves closer or further away, thereby clamping or releasing the optical lens. 2. Cleaning state: In this state, the carrier frame 301 rotates counterclockwise from the initial state and becomes upright. At this time, the placement plate 308b can no longer block the optical lens. The clamping unit 300 is rotated by the rotating unit 200 to achieve cleaning of the optical lens.

[0059] It should be noted that after cleaning, the support frame 301 is rotated 180 degrees clockwise from the upright position to the reverse upright position. At this time, the limiting block 308a changes from contacting the X end to contacting the Y end. Then, the support frame 301 is rotated 90 degrees counterclockwise so that the support frame 301 returns to the horizontal position. At this time, the placement plate 308 will be directly below the clamping plate 302c, which can support the optical lens and realize the transition from the cleaning state to the pick-up and put-down state.

[0060] During use, the liquid level of the cleaning fluid in the inner chamber 101 is controlled so that the clamping unit 300 is partially detached from the cleaning fluid during rotation. By controlling the first motor 206c and the second motor 207c, the cleaning system is in the pick-and-place state. Optical lenses are placed on the placement plate 308 and clamped by the clamping plate 302c. The second driving member 207 drives the second rotating rod 203 to rotate. After all optical lenses are placed, the first driving member 206 drives the first rotating rod 202 to rotate, changing the cleaning system from the pick-and-place state to the cleaning state, and then the optical lenses are cleaned. After cleaning, the device returns to the pick-and-place state, allowing the optical lenses to be removed one by one. The device described in this invention enables the optical lenses to rotate continuously around the fixed axis 201 in a vertical position. This not only agitates the cleaning fluid and accelerates the cleaning efficiency but also ensures that both sides of the optical lenses are cleaned to the same degree, resulting in a better cleaning effect. Furthermore, due to the continuous rotation of the rotating unit 200, the optical lenses continuously detach from the cleaning fluid in a vertical position. The vertical position allows the liquid on the optical lenses to fall off easily, and the dirt detached from the optical lenses will also leave the optical lenses with the cleaning fluid, achieving a better cleaning effect.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An ultrasonic cleaning method for optical lenses, characterized in that: Includes the following steps, Add organic solvent cleaning solution to the inner chamber (101) of the cleaning unit; The lens is fixed in a horizontal position to the clamping unit (300), and the clamping unit (300) is rotated to make the lens change to a vertical position; Turn on the ultrasonic generator and make the clamping unit (300) revolve at the first speed V1 to perform the initial cleaning; The clamping unit (300) is made to revolve at a second rotational speed V2, and at the same time, the clamping unit (300) is made to rotate at a third rotational speed V3 for intermediate cleaning; The lens is rotated back to a vertical position, and the clamping unit (300) is made to revolve at the first rotation speed V1 for subsequent cleaning. Turn off the ultrasonic generator, turn the lens back to a horizontal position, and complete the first cleaning. Drain the organic solvent cleaning solution, and add alkaline cleaning solution, acidic cleaning solution and pure water to the inner tank (101) in sequence. Repeat the above steps to perform the second, third and fourth cleaning. The clamping unit (300) is connected to the rotating unit (200). The clamping unit (300) has a first rotating shaft (M) at both ends. The clamping unit (300) can rotate relative to the first rotating shaft (M). The rotating unit (200) includes a second rotating shaft (N). The clamping unit (300) can revolve relative to the second rotating shaft (N). The clamping unit (300) can maintain a constant angle during the revolve. The cleaning unit (100) includes an inner housing (101), an outer housing (102), and an ultrasonic component (103). A sandwich (A) is provided between the inner housing (101) and the outer housing (102). The ultrasonic component (103) includes an ultrasonic generator (103a) disposed in the sandwich (A) and a transducer (103b) disposed at the bottom of the inner housing (101). The rotating unit (200) includes a fixed shaft (201) fixed to the inner sidewalls of the two outer housings (102), a first rotating rod (202) sleeved on the fixed shaft (201), a second rotating rod (203) sleeved on the first rotating rod (202), a first gear (204) fixed to the end of the first rotating rod (202), a rotating component (205) disposed at the end of the second rotating rod (203) and cooperating with the first gear (204), a first driving component (206) driving the first rotating rod (202) to rotate, and a second driving component (207) driving the second rotating rod (203) to rotate. The first driving member (206) includes a worm gear (206a) disposed at the end of the first rotating rod (202), a worm (206b) cooperating with the worm gear (206a), and a first motor (206c) driving the worm (206b) to rotate. The first motor (206c) is fixed on the side wall of the outer casing (102). The second driving member (207) includes a fifth gear (207a) disposed at the end of the second rotating rod (203), a sixth gear (207b) meshing with the fifth gear (207a), and a second motor (207c) driving the sixth gear (207b) to rotate. The clamping unit (300) is disposed between the two rotating parts (205) and includes a support frame (301), a clamping part (302) that slides with the support frame (301), a threaded rod (303) that threadedly engages with the clamping part (302), a second gear (304) that is fixedly connected to the end of the threaded rod (303), a synchronous belt (305) that connects the two second gears (304), a third motor (306) that drives the threaded rod (303) to rotate, and a motor housing (307) connected to the support frame (301), wherein the third motor (306) is disposed inside the motor housing (307).

2. The ultrasonic cleaning method for optical lenses as described in claim 1, characterized in that: When adding cleaning fluid to the inner chamber (101), the level of the cleaning fluid must meet the following requirements. h2≤h1≤0.7(h2+r1) In the formula, h1 is the liquid level of the cleaning fluid, h2 is the height of the second rotating shaft (N), and r1 is the rotation radius of the clamping unit (300) when it revolves.

3. The ultrasonic cleaning method for optical lenses as described in claim 2, characterized in that: The first rotational speed V1, the second rotational speed V2, and the third rotational speed V3 satisfy the following requirements. 30 r / min ≤ V1 ≤ 40 r / min 10 r / min ≤ V2 ≤ 15 r / min 60r / min≤V3≤120r / min.

4. An ultrasonic cleaning system employing the ultrasonic cleaning method for optical lenses as described in any one of claims 1 to 3, characterized in that: include, The control unit (400) includes a first angular velocity sensor (401) for measuring the rotational speed of the clamping unit (300), a second angular velocity sensor (402) for measuring the revolution speed of the clamping unit (300), a liquid level sensor (403) for monitoring the liquid level of the cleaning fluid in the inner box (101), a PLC controller (404) for controlling the first motor (206c), the second motor (207c) and the third motor (306), and a display screen (405) for display.

5. The ultrasonic cleaning system as described in claim 4, characterized in that: The rotating component (205) includes a turntable (205a) disposed at the end of the second rotating rod (203), a connecting rod (205b) fixed to the side of the turntable (205a), and a third gear (205c) and a fourth gear (205d) rotatably engaged with the same connecting rod (205b). The third gear (205c) meshes with the first gear (204), and the fourth gear (205d) meshes with the third gear (205c). A plurality of connecting rods (205b) are disposed at equal angles on the turntable (205a). The diameters of the first gear (204), the third gear (205c), and the fourth gear (205d) are all equal, and the number of teeth is the same.

6. The ultrasonic cleaning system as described in claim 5, characterized in that: The support frame (301) is fixed on the fourth gear (205d). The support frame (301) has a first slide groove (301a) at both ends. The clamping member (302) includes a sliding block (302a) disposed in the first slide groove (301a), a support plate (302b) disposed between the two sliding blocks (302a), a clamping plate (302c) that slides with the support plate (302b), and a spring (302d) that cooperates with the clamping plate (302c).

7. The ultrasonic cleaning system as described in claim 6, characterized in that: The bearing plate (302b) is provided with a plurality of second slide grooves (302b-1), one end of the clamping plate (302c) is disposed in the second slide groove (302b-1), and the spring (302d) is disposed between the clamping plate (302c) and the inner sidewall of the second slide groove (302b-1).

8. The ultrasonic cleaning system as described in claim 7, characterized in that: Two clamping members (302) are symmetrically arranged. The threaded rod (303) is provided with two threaded grooves (303a) with opposite directions of rotation. The sliding block (302a) is threadedly engaged with the threaded rod (303).

9. The ultrasonic cleaning system as described in claim 8, characterized in that: The clamping unit (300) further includes a placement plate (308) disposed at the bottom of the support plate (302b), a support rod (301b) disposed on the support frame (301), a third slide groove (301b-1) disposed on the support rod (301b), a limiting block (308a) cooperating with the third slide groove (301b-1) disposed at the bottom of the placement plate (308), and a limiting protrusion (301b-2) disposed on the side wall of the third slide groove (301b-1).

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