Laser marking device for optical lens processing

Abstract

The invention relates to the technical field of laser marking devices, and particularly discloses a laser marking device for optical lens processing, which comprises a marking device main body, a laser and a conveyor belt are further included; the multiple clamps are arranged and located on the surface of the conveying belt; according to the laser marking device for optical lens machining, in-situ multi-point detection is carried out on a lens through the arranged curved surface detection mechanism, lens curved surface data do not need to be input in advance, and the laser marking efficiency is improved; curved surface detection and laser marking are completed at the same station, marking is carried out immediately after detection, the problem of posture deviation caused by station separation is avoided, it is ensured that curved surface data can truly reflect the lens state during marking, and the laser incident angle and the focal length can be corrected in real time according to curved surface changes through the laser adjusting mechanism. Independent debugging for different types of lenses is not needed, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of laser marking devices, in particular to a laser marking device for optical lens processing. BACKGROUND

[0002] An optical lens is a transparent optical element that is processed with high precision and can accurately control light rays. The optical lens is a precision part specially used for refraction, focusing, imaging and correcting light rays. In the optical lens processing process, a laser marking device uses a high-energy laser beam to form permanent marks on the surface or edge of the lens, which are used for parameter marking, anti-counterfeiting, tracing or decoration, and do not damage the optical performance of the lens.

[0003] When the laser marking device is in use, the laser generates a high-energy laser beam of a specific wavelength through stimulated radiation. The laser beam is adjusted in diameter by an expander mirror to improve beam quality and focusing accuracy, and then enters a galvanometer scanning system. A computer controls the high-speed deflection of the X-Y axis galvanometer to control the scanning path of the laser beam in real time. A focusing lens focuses the laser beam into a light spot, and the laser spot acts on the surface of the lens. Different reactions are produced according to the laser type and material properties. The computer controls the galvanometer scanning according to the preset pattern, and the laser beam writes point by point and line by line to form a final pattern.

[0004] However, most optical lenses are spherical or aspherical curved surfaces, and the laser marking head is a planar focal plane. In order to avoid the different defocusing amounts of the high points and low points of the curved surface from causing different marking depths and blurred characters, some existing laser marking devices input the curved surface curvature or 3D profile of the lens in advance, so that during marking, the system adjusts the focal length in real time according to the scanning position, so that the laser spot always falls on the curved surface of the lens without defocusing. However, this method requires the curved surface profile of the lens to be input in advance. The adaptation of the curved surface profile to the special-shaped curved surface is poor, and the curved surface input position of the lens is not at the same position as the laser marking position. The lens needs to be moved a certain distance to reach the marking station. During the delay process from the input point to the marking point of the lens, if the attitude of the lens changes, the curved surface data at the input time cannot represent the real state during laser marking, which affects the marking effect. Therefore, we propose a laser marking device for optical lens processing. SUMMARY

[0005] The purpose of the present application is to provide a laser marking device for optical lens processing to solve the problem that the curved surface profile of the lens needs to be input in advance, the adaptation of the curved surface profile to the special-shaped curved surface is poor, and the curved surface input position of the lens is not at the same position as the laser marking position. The lens needs to be moved a certain distance to reach the marking station. During the delay process from the input point to the marking point of the lens, if the attitude of the lens changes, the curved surface data at the input time cannot represent the real state during laser marking, which affects the marking effect.

[0006] To achieve the above object, the present application provides the following technical scheme: a laser marking device for optical lens processing, comprising a marking device main body; further comprising a laser and a conveyor belt, the laser and the conveyor belt are located inside the marking device main body, and the laser is located at the top of the conveyor belt; a clamp, the clamp is provided with a plurality of clamps, and the clamp is located on the surface of the conveyor belt; A curved surface detection mechanism is arranged on the surface of the clamp. When the clamp moves directly below the laser, the curved surface detection mechanism detects the curvature of the lens marking area in the clamp. A laser adjusting mechanism is arranged in the laser. After the curved surface detection mechanism detects the curvature of the lens, the laser adjusting mechanism adjusts the laser incidence angle of the laser according to the detection result.

[0007] The curved surface detection mechanism comprises a fixed cover, the surface of the clamp is provided with a placing groove, the fixed cover abuts against the inner wall of the placing groove, the inner wall of the fixed cover is provided with a containing groove, the containing groove is slidably connected with a detection plate, the detection plate is internally provided with a detection piece, and the surface of the clamp is provided with a transmission piece for driving the detection piece to work.

[0008] The transmission piece comprises a piston plate fixedly connected with the detection plate, the piston plate is slidably and sealingly connected with the inner wall of the containing groove, the outer side of the piston plate is fixedly connected with a return spring, the return spring is fixed with the inner wall of the containing groove, the inner wall of the clamp is provided with a gas delivery hole, the gas delivery hole is communicated with the containing groove, a pneumatic telescopic rod is installed on the inner wall of the marking device main body, the telescopic end of the pneumatic telescopic rod is fixedly connected with a moving frame, the inner wall of the moving frame is fixedly connected with a gas delivery pipe, the gas delivery pipe is communicated with the gas source in the marking device main body, and the end of the gas delivery pipe close to the clamp is provided with a butt joint piece.

[0009] The butt joint piece comprises a butt joint frame, the butt joint frame is fixedly connected with the moving frame, the butt joint frame is communicated with the gas delivery pipe, the surface of the clamp is fixedly connected with a butt joint plate, the butt joint plate is communicated with the gas delivery hole, a plurality of butt joint holes are formed in the surface of the butt joint plate, a plurality of butt joint columns are arranged at the end of the butt joint frame close to the butt joint plate, a target plate is fixedly connected to the surface of the butt joint plate, and a laser range finder is installed on the surface of the butt joint frame.

[0010] The detection piece comprises a gas cavity formed in the inner wall of the detection plate, a communication hole is formed in the inner wall of the detection plate, the two ends of the communication hole are respectively communicated with the gas cavity and the containing groove, a sealing piece is arranged on the inner wall of the communication hole, after the detection plate slides along the inner wall of the containing groove by a fixed distance, the sealing piece unblocks the communication hole, a plurality of detection holes are formed in the lower surface of the detection plate, a plurality of feedback holes are formed in the upper surface of the detection plate, the plurality of detection holes and the plurality of feedback holes are communicated in the vertical direction, and a measuring piece for measuring the distance between the detection hole and the lens is arranged on the inner wall of the feedback hole.

[0011] The measuring piece comprises a detection rod slidably connected with the inner wall of the feedback hole, a plurality of infrared range finders are arranged on the inner wall of the gas cavity, and the plurality of infrared range finders are in one-to-one correspondence with the plurality of detection rods.

[0012] The end of the detection rod passing through the feedback hole is fixedly connected with an iron ring, a plurality of electromagnets are installed on the top of the detection plate, the plurality of electromagnets are located outside the feedback hole respectively, the electromagnets correspond to the iron ring one by one, and the surface of the marking device main body is provided with a controller.

[0013] The sealing element comprises a sealing plug in sliding connection with the inner wall of the communication hole, and a compression spring is fixedly connected to the outer side of the sealing plug and fixedly connected with the inner wall of the communication hole.

[0014] The laser adjusting mechanism comprises an electric telescopic rod fixedly connected with the end of the laser, an adjusting box is fixedly connected to the output end of the electric telescopic rod, a reflecting mirror one and a reflecting mirror two are installed on the inner wall of the adjusting box, a servo motor one is fixedly connected to the outer side of the reflecting mirror one, a servo motor two is fixedly connected to the outer side of the reflecting mirror two, the servo motor one and the servo motor two are both installed on the inner wall of the adjusting box, the output shafts of the servo motor one and the servo motor two are perpendicular to each other, a control card is installed on the surface of the laser, and the control card is connected with the infrared range finder, the electric telescopic rod, the servo motor one and the servo motor two respectively.

[0015] The sealing end of the sealing plug is conical.

[0016] The present application has at least the following beneficial effects: When the present application is used, the curved surface detection mechanism is arranged to detect the lens in situ, and is suitable for various optical lenses such as spherical surfaces, aspherical surfaces and special-shaped curved surfaces, without the need to input the lens curved surface data in advance, the curved surface detection and the laser marking are completed at the same station, the marking is performed immediately after detection, there is no delay caused by lens movement, the attitude deviation problem caused by station separation is avoided, the curved surface data can truly reflect the lens state during marking, the laser incidence angle and focal length can be corrected in real time according to the curved surface change through the laser adjusting mechanism, separate adjustment is not needed for different types of lenses, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the internal structure of the present application; Figure 3 It is a schematic diagram of the laser adjusting mechanism of the present application; Figure 4 It is a schematic diagram of the curved surface detection mechanism of the present application; Figure 5 It is Figure 4 It is an enlarged schematic diagram of area A in the middle; Figure 6 It is a schematic diagram of the fixed cover structure of the present application; Figure 7It is a structure side view schematic diagram of the detection plate of the application; Figure 8 It is Figure 7 It is an enlarged schematic diagram of the B area; Figure 9 It is a structure schematic diagram of the sealing piece from the top view.

[0018] In the figure: 1, marking device main body; 2, laser; 3, conveying belt; 4, clamp; 5, curved surface detection mechanism; 50, fixed cover; 51, placing groove; 52, containing groove; 53, detection plate; 54, detection piece; 55, transmission piece; 56, piston plate; 57, return spring; 58, gas conveying hole; 59, pneumatic telescopic rod; 510, moving frame; 511, gas conveying pipe; 512, butt joint piece; 513, butt joint frame; 514, butt joint plate; 515, butt joint hole; 516, butt joint column; 517, target plate; 518, laser range finder; 519, air cavity; 520, communication hole; 521, sealing piece; 522, detection hole; 523, feedback hole; 524, measuring piece; 525, detection rod; 526, infrared range finder; 527, iron ring; 528, electromagnet; 529, controller; 530, sealing plug; 531, compression spring; 6, laser adjusting mechanism; 60, electric telescopic rod; 61, regulation and control box; 62, reflecting mirror one; 63, reflecting mirror two; 64, servo motor one; 65, servo motor two; 66, control card. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the application will be apparently and completely described below with the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all the other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the application.

[0020] Please refer to Figures 1 to 9 The application provides a technical solution: a laser marking device for optical lens processing, which comprises a marking device main body 1; further comprises a laser 2 and a conveying belt 3, the laser 2 and the conveying belt 3 are located inside the marking device main body 1, the laser 2 is located on the top of the conveying belt 3; a clamp 4, the clamp 4 is provided with a plurality of clamps 4, the clamps 4 are located on the surface of the conveying belt 3; a curved surface detection mechanism 5, the curved surface detection mechanism 5 is located on the surface of the clamp 4, when the clamp 4 moves to the position directly below the laser 2, the curved surface detection mechanism 5 detects the curvature of the lens marking area located in the clamp 4; a laser adjusting mechanism 6, the laser adjusting mechanism 6 is located inside the laser 2, after the curved surface detection mechanism 5 detects the curvature of the lens, the laser adjusting mechanism 6 adjusts the laser incidence angle of the laser 2 according to the detection result.

[0021] In use, the operator places the optical lens to be marked (spherical, aspherical, or irregular curved surface) into the fixture 4 to achieve initial positioning; then fastens the fixing cover 50 and moves the curved surface detection mechanism 5 above the optical lens; The main body 1 of the marking device starts the conveyor belt 3, which transports the fixture 4 to the marking station. When the fixture 4 moves directly below the laser 2, the conveyor belt 3 stops working. At this time, the curved surface inspection mechanism 5 unfolds, the operator selects the marking area of ​​the optical lens, and then the curved surface inspection mechanism 5 automatically detects the curved surface shape of the marking area of ​​the optical lens. Based on the detected lens curved surface data, the laser adjustment mechanism 6 makes the laser incident angle and focal length correct in real time according to the changes in the curved surface. After adjustment, laser 2 is started, and laser adjustment mechanism 6 controls laser deflection and plans laser scanning path according to preset marking pattern and real-time curved surface data; After marking is completed, laser 2 is turned off, conveyor belt 3 is restarted, the marked lens is sent to the unloading station, and the next unmarked lens is moved to the marking station. The operator opens the fixing cover 50, takes out the lens, and completes the entire processing flow.

[0022] The curved surface inspection mechanism 5 includes a fixed cover 50, a placement groove 51 is provided on the surface of the fixture 4, the fixed cover 50 abuts against the inner wall of the placement groove 51, a receiving groove 52 is provided on the inner wall of the fixed cover 50, a detection plate 53 is slidably connected to the inner wall of the receiving groove 52, a detection element 54 is provided inside the detection plate 53, and a transmission element 55 is provided on the surface of the fixture 4 to drive the detection element 54 to work.

[0023] When the conveyor belt 3 moves the fixture 4 directly below the laser 2, the transmission component 55 pushes the detection plate 53 to slide along the inner wall of the receiving groove 52, so that the detection plate 53 unfolds from the receiving groove 52. When the detection plate 53 is fully unfolded, the transmission component 55 drives the detection component 54 in the detection plate 53 to work. The detection component 54 performs in-situ multi-point detection on the optical lens in the fixture 4 to match the surface data of the area to be marked on the detection lens.

[0024] The transmission component 55 includes a piston plate 56 fixedly connected to the detection plate 53. The piston plate 56 is slidably and sealed to the inner wall of the receiving groove 52. A return spring 57 is fixedly connected to the outer side of the piston plate 56 to cooperate in resetting the unfolded detection plate 53. The return spring 57 is fixed to the inner wall of the receiving groove 52. An air supply hole 58 is opened on the inner wall of the clamp 4. The air supply hole 58 is connected to the receiving groove 52. A pneumatic telescopic rod 59 is installed on the inner wall of the marking device body 1. A movable frame 510 is fixedly connected to the telescopic end of the pneumatic telescopic rod 59. An air supply pipe 511 is fixedly connected to the inner wall of the movable frame 510. The air supply pipe 511 is connected to the air source inside the marking device body 1. In use, air is supplied to the air supply pipe 511 through the air source inside the marking device body 1. A docking part 512 is provided at the end of the air supply pipe 511 near the clamp 4.

[0025] When the clamp 4 moves directly below the laser 2, the pneumatic telescopic rod 59 operates, driving the moving frame 510 to move. The moving frame 510 drives the docking part 512 to approach the clamp 4. Through the docking part 512, the gas in the gas supply pipe 511 enters the gas supply hole 58, causing the gas pressure in the receiving groove 52 to gradually increase. When the connection is first established, as the gas pressure in the receiving groove 52 increases, the gas in the receiving groove 52 pushes the detection plate 53 to move through the piston plate 56. When the detection plate 53 is fully extended, the gas in the receiving groove 52 can no longer push the piston plate 56 to continue moving, causing the gas pressure in the receiving groove 52 to continue to increase.

[0026] The docking component 512 includes a docking frame 513, which is fixedly connected to the moving frame 510 and connected to the air supply pipe 511. A docking plate 514 is fixedly connected to the surface of the clamp 4 and is connected to the air supply hole 58. Multiple docking holes 515 are opened on the surface of the docking plate 514. Multiple docking posts 516 are provided on one end of the docking frame 513 near the docking plate 514. A target plate 517 is fixedly connected to the surface of the docking plate 514. A laser rangefinder 518 is installed on the surface of the docking frame 513 and is connected to the pneumatic telescopic rod 59. The laser rangefinder 518 is used to detect the position of the target plate 517. When the target plate 517 moves into the detection range of the laser rangefinder 518, the pneumatic telescopic rod 59 is triggered to work.

[0027] When the conveyor belt 3 moves the clamp 4, the clamp 4 moves the docking plate 514, and the target plate 517 of the docking plate 514 moves. When the target plate 517 moves to the outside of the laser rangefinder 518, the laser rangefinder 518 detects that the clamp 4 has moved to the marking station. At this time, the laser rangefinder 518 controls the pneumatic telescopic rod 59 to extend. The pneumatic telescopic rod 59 moves the moving frame 510. The moving frame 510 moves the docking frame 513 closer to the docking plate 514, so that the docking post 516 of the docking frame 513 is inserted into the docking hole 515, so that the air supply pipe 511 is connected to the air supply hole 58 to cooperate in filling the receiving groove 52 with air.

[0028] The detection component 54 includes an air cavity 519 formed in the inner wall of the detection plate 53. A connecting hole 520 is formed in the inner wall of the detection plate 53. The two ends of the connecting hole 520 are connected to the air cavity 519 and the receiving groove 52, respectively. A sealing element 521 is provided in the inner wall of the connecting hole 520. After the detection plate 53 slides along the inner wall of the receiving groove 52 for a fixed distance, the sealing element 521 releases the seal on the connecting hole 520. A plurality of detection holes 522 are formed on the lower surface of the detection plate 53. A plurality of feedback holes 523 are formed on the upper surface of the detection plate 53. The plurality of detection holes 522 and the plurality of feedback holes 523 are connected in the vertical direction. A measuring element 524 for measuring the distance between the detection hole 522 and the lens is provided in the inner wall of the feedback hole 523.

[0029] When the gas supply pipe 511 just starts to fill the receiving tank 52 with gas, the gas in the receiving tank 52 pushes the piston plate 56 to slide along the inner wall of the receiving tank 52, and the piston plate 56 drives the detection plate 53 to move. When the detection plate 53 is fully deployed, as the gas supply pipe 511 continues to fill with gas, the gas pressure in the receiving groove 52 continuously increases. When the gas pressure in the receiving groove 52 reaches the threshold, the seal 521 releases the seal on the connecting hole 520. At this time, the gas in the receiving groove 52 enters the gas chamber 519 through the connecting hole 520. The gas chamber 519 injects gas into multiple chambers composed of detection holes 522 and feedback holes 523. After the gas enters the gas chamber 519, because the feedback hole 523 is equipped with a measuring element 524, the gas will be ejected from the detection hole 522. The air column ejected from 522 impacts the lens surface. After the airflow bounces off, it creates a reverse pressure at the aperture. This pressure is transmitted back into the detection aperture 522, causing the back pressure to rise. The back pressure varies depending on the distance between the lens and the detection aperture 522. The back pressure is detected by the measuring element 524. The greater the back pressure, the closer the vertical distance between the lens surface and the detection aperture 522. Thus, multiple measuring elements 524 can perform multi-point detection on the lens, adapting to various optical lenses such as spherical, aspherical, and irregular curved surfaces, without the need to pre-enter the lens surface data.

[0030] The measuring component 524 includes a detection rod 525 slidably connected to the inner wall of the feedback hole 523. Multiple infrared rangefinders 526 are provided on the inner wall of the air chamber 519, with each infrared rangefinder 526 corresponding to one of the detection rods 525. An iron ring 527 is fixedly connected to one end of the detection rod 525 extending out of the feedback hole 523. Multiple electromagnets 528 are mounted on the top of the detection plate 53, located outside the feedback hole 523, with each electromagnet corresponding to one of the iron rings 527. A controller 529 is mounted on the surface of the marking device body 1. Each electromagnet 528 is numbered, and the controller 529 controls the energization of the multiple electromagnets 528 according to their numbers.

[0031] When the detection plate 53 is fully unfolded, the detection plate 53 overlaps with the marking area of ​​the optical lens in the vertical direction. Since the marking area of ​​the optical lens is generally on the side of the lens, the operator controls the electromagnet 528 in the corresponding area of ​​the detection plate 53 to de-energize through the controller 529, so that the area composed of multiple de-energized electromagnets 528 completely covers the marking area. As gas is injected into the chamber composed of detection hole 522 and feedback hole 523 from the gas chamber 519, the de-energized electromagnet 528 no longer attracts the iron ring 527 at the top of the detection rod 525. As the back pressure increases, the detection rod 525 moves a greater distance along the feedback hole 523. The movement distance of the detection rod 525 is measured by the infrared rangefinder 526. The movement amplitude of multiple detection rods 525 is used to match the degree of undulation of the surface of the lens marking area.

[0032] The sealing element 521 includes a sealing plug 530 that is slidably connected to the inner wall of the connecting hole 520. A compression spring 531 is fixedly connected to the outer side of the sealing plug 530. The compression spring 531 is fixedly connected to the inner wall of the connecting hole 520. The sealing end of the sealing plug 530 is tapered.

[0033] As the gas pressure in the receiving groove 52 gradually increases, the pressure of the gas on the sealing plug 530 also increases. When the pressure of the gas on the sealing plug 530 in the receiving groove 52 is greater than the elastic force of the compression spring 531 on the sealing plug 530, the sealing plug 530 slides along the inner wall of the connecting hole 520, so that the sealing plug 530 releases the seal on the connecting hole 520. When the gas filling in the receiving groove 52 stops, the compression spring 531 pushes the sealing plug 530 to reset, so as to close the connecting hole 520 again.

[0034] The laser adjustment mechanism 6 includes an electric telescopic rod 60 fixedly connected to the end of the laser 2. A control box 61 is fixedly connected to the output end of the electric telescopic rod 60. A reflector 62 and a reflector 63 are installed on the inner wall of the control box 61. A servo motor 64 is fixedly connected to the outer side of the reflector 62. A servo motor 65 is fixedly connected to the outer side of the reflector 63. Both the servo motor 64 and the servo motor 65 are installed on the inner wall of the control box 61. The output shafts of the servo motor 64 and the servo motor 65 are perpendicular to each other. A control card 66 is installed on the surface of the laser 2. The control card 66 is connected to the infrared rangefinder 526, the electric telescopic rod 60, the servo motor 64, and the servo motor 65.

[0035] The control card 66 is a commonly used embedded motion control card in the laser processing field. It is fixedly installed on the outer wall of the laser 2 and integrates a microprocessor (MCU / FPGA), a signal acquisition unit, a data processing unit, and a drive output interface. The control card 66 is connected to the infrared rangefinder 526, the electric telescopic rod 60, the servo motor 1 64, and the servo motor 2 65 via data cables to realize real-time data transmission and command issuance. The control card 66 has a built-in surface fitting algorithm, which can quickly fit the equation of the curvature of the lens marking area based on the distance data of multiple infrared rangefinders 526, and then calculate the adjustment parameters of the laser incident angle and focal length.

[0036] In use, the infrared rangefinder 526 uploads the multi-point height information of the marking area of ​​the optical lens to the control card 66. After receiving the multi-point height signals of the lens collected by multiple infrared rangefinders 526 in real time, the control card runs the internal preset surface fitting algorithm to fit the scattered height points into the real-time surface curvature equation of the marking area of ​​the lens. Based on the surface equation, the defocus amount of each marking point and the corresponding laser incident angle are automatically calculated.

[0037] The control card 66 controls the electric telescopic rod 60 to work according to the defocus amount. The electric telescopic rod 60 drives the adjustment box 61 to move in order to adjust the focal length. After the control card 66 sends a signal to the servo motor 1 64 and the servo motor 2 65, the servo motor 1 64 and the servo motor 2 65 adjust the angle of the reflector 1 62 and the reflector 2 63 so that the laser always hits the curved lens perpendicularly and plans the laser scanning path.

[0038] In this application, the basic algorithm principles such as surface fitting algorithm, defocus calculation, and laser incident angle have been widely used in the field of 3D laser marking. Surface fitting algorithms: Least squares, polynomial fitting, NURBS and other surface fitting methods have been maturely applied in the fields of optical inspection and 3D modeling. They can fit the surface equation through multi-point height data and calculate parameters such as curvature and normal direction. Defocus calculation: 3D laser marking machines generally use a height detection system (laser range sensor / vision camera) to obtain workpiece height data, and combine it with the focal length relationship to calculate the defocus amount, so as to achieve dynamic focusing. This is one of the core principles of 3D dynamic focusing technology.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser marking device for optical lens processing, comprising: The main body of the marking device; Its features include: a laser and a conveyor belt, wherein the laser and the conveyor belt are located inside the main body of the marking device, and the laser is located at the top of the conveyor belt; A clamp, wherein multiple clamps are provided and the clamps are located on the surface of the conveyor belt; A curved surface inspection mechanism is located on the surface of a fixture. When the fixture moves to a position directly below the laser, the curved surface inspection mechanism detects the curvature of the lens marking area within the fixture. A laser adjustment mechanism is located inside the laser. After the curved surface detection mechanism detects the curvature of the lens, the laser adjustment mechanism adjusts the laser incident angle of the laser according to the detection result.

2. The laser marking device for optical lens processing according to claim 1, characterized in that: The curved surface inspection mechanism includes a fixed cover, a placement groove is provided on the surface of the fixture, the fixed cover abuts against the inner wall of the placement groove, a receiving groove is provided on the inner wall of the fixed cover, a detection plate is slidably connected to the inner wall of the receiving groove, a detection component is provided inside the detection plate, and a transmission component for driving the detection component is provided on the surface of the fixture.

3. The laser marking device for optical lens processing according to claim 2, characterized in that: The transmission component includes a piston plate fixedly connected to the detection plate. The piston plate is slidably and sealingly connected to the inner wall of the receiving groove. A return spring is fixedly connected to the outer side of the piston plate. The return spring is fixed to the inner wall of the receiving groove. An air supply hole is opened on the inner wall of the fixture and communicates with the receiving groove. A pneumatic telescopic rod is installed on the inner wall of the marking device body. A movable frame is fixedly connected to the telescopic end of the pneumatic telescopic rod. An air supply pipe is fixedly connected to the inner wall of the movable frame and communicates with the air source inside the marking device body. A docking part is provided at one end of the air supply pipe near the fixture.

4. The laser marking device for optical lens processing according to claim 3, characterized in that: The docking component includes a docking frame, which is fixedly connected to a movable frame and communicates with an air supply pipe. A docking plate is fixedly connected to the surface of the clamp and communicates with an air supply hole. Multiple docking holes are opened on the surface of the docking plate. Multiple docking posts are provided on one end of the docking frame near the docking plate. A target plate is fixedly connected to the surface of the docking plate, and a laser rangefinder is installed on the surface of the docking frame.

5. The laser marking apparatus for optical lens processing according to claim 2, characterized in that: The detection element includes an air cavity formed in the inner wall of the detection plate. A connecting hole is formed in the inner wall of the detection plate, and the two ends of the connecting hole are respectively connected to the air cavity and the receiving groove. A sealing element is provided in the inner wall of the connecting hole. After the detection plate slides a fixed distance along the inner wall of the receiving groove, the sealing element releases the seal on the connecting hole. Multiple detection holes are formed on the lower surface of the detection plate, and multiple feedback holes are formed on the upper surface of the detection plate. The multiple detection holes and multiple feedback holes are connected in the vertical direction. A measuring element for measuring the distance between the detection hole and the lens is provided in the inner wall of the feedback hole.

6. The laser marking apparatus for optical lens processing according to claim 5, characterized in that: The measuring element includes a detection rod that is slidably connected to the inner wall of the feedback hole. The inner wall of the air cavity is provided with multiple infrared rangefinders, and each of the multiple infrared rangefinders corresponds to one of the multiple detection rods.

7. The laser marking apparatus for optical lens processing according to claim 6, characterized in that: An iron ring is fixedly connected to one end of the detection rod that protrudes from the feedback hole. Multiple electromagnets are installed on the top of the detection plate. The multiple electromagnets are located outside the feedback hole, and each electromagnet corresponds to an iron ring. A controller is installed on the surface of the main body of the marking device. The controller controls the multiple electromagnets to turn on and off.

8. The laser marking apparatus for optical lens processing according to claim 5, characterized in that: The sealing element includes a sealing plug that is slidably connected to the inner wall of the connecting hole, and a compression spring is fixedly connected to the outer side of the sealing plug. The compression spring is fixedly connected to the inner wall of the connecting hole.

9. The laser marking apparatus for optical lens processing according to claim 6, characterized in that: The laser adjustment mechanism includes an electric telescopic rod fixedly connected to the end of the laser. A control box is fixedly connected to the output end of the electric telescopic rod. A reflector 1 and a reflector 2 are installed on the inner wall of the control box. A servo motor 1 is fixedly connected to the outer side of the reflector 1, and a servo motor 2 is fixedly connected to the outer side of the reflector 2. Both servo motor 1 and servo motor 2 are installed on the inner wall of the control box. The output shafts of servo motor 1 and servo motor 2 are perpendicular to each other. A control card is installed on the surface of the laser. The control card is connected to the infrared rangefinder, the electric telescopic rod, servo motor 1, and servo motor 2, respectively.

10. The laser marking apparatus for optical lens processing according to claim 8, characterized in that: The sealing end of the sealing plug is tapered.

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