A driving device for laser dynamic focusing

Abstract

The application relates to the technical field of laser equipment, and particularly discloses a driving device for laser dynamic focusing, which comprises a driving module and a focusing element module; the driving module comprises a base, a magnetic core and a coil framework, a sleeve is integrally formed on the side surface of the base, the coil framework is installed in the sleeve, a coil is arranged on the recessed part on the outer side of the coil framework, and the magnetic core is arranged in the hollow position of the coil framework; the driving module is provided with two driving modules which are arranged in an axial symmetry mode with respect to the magnetic core; and the focusing element module is installed between the two magnetic cores. The driving device has the characteristics of fast response speed, high positioning precision and high stability.

Description

Technical Field

[0001] This invention relates to the field of laser equipment technology, and in particular to a driving device for dynamic laser focusing. Background Technology

[0002] In high-end optical applications such as laser processing, 3D printing, microscopic imaging, and optical communication, which require high-frequency and high-precision adjustment of the optical path focus, the optical dynamic focusing system is the core component for real-time control of the spatial position of the beam focus. Its performance directly determines the processing accuracy, imaging resolution, and signal transmission efficiency of the entire equipment. The core working principle of this system is as follows: by driving the focusing element (such as a spherical lens, aspherical lens, or microlens array) to adjust its displacement along the optical axis, the converging characteristics of the beam are changed, thereby achieving rapid switching and precise positioning of the focus within a preset range. Among them, the drive mechanism, as the power execution unit, constitutes the key technical indicators of system performance in terms of response speed, positioning accuracy, and long-term stability.

[0003] Currently, lens driving solutions are mainly divided into two categories: traditional mechanical transmission drive and electromagnetic drive. Both types of solutions have technical bottlenecks that are difficult to overcome in practical applications. The specific defects are analyzed as follows:

[0004] I. Technical Limitations of Traditional Mechanical Transmission Drive Solutions

[0005] Traditional mechanical transmission drives typically employ a "motor + lead screw / gear" transmission architecture. Due to the inherent physical characteristics of the mechanical structure, this approach has the following significant drawbacks:

[0006] The response speed is difficult to meet the requirements of high-frequency applications: Due to the rotational inertia of the motor rotor and the transmission lag effect caused by the meshing gap of the lead screw / gear, the single-pass adjustment response time of this type of drive mechanism is generally greater than 50ms, which cannot meet the requirements of high-frequency dynamic focusing (such as the adjustment frequency of ≥1kHz in laser processing).

[0007] The positioning accuracy cannot reach the micron level standard: The screw pitch error, gear meshing clearance (usually ≥10μm) and stepper motor step angle error (typically ±5%) in the mechanical transmission chain will generate cumulative positioning error, which will cause the actual displacement of the focusing element to deviate from the control command, making it difficult to achieve micron-level positioning accuracy and failing to meet the requirements of high-precision optical applications.

[0008] Limited long-term stability and service life: Mechanical components such as lead screws and gears will wear out during long-term operation, resulting in a gradual increase in transmission clearance and a decrease in positioning accuracy over time. Their mean time between failures (MTBF) is usually less than 10,000 hours, requiring frequent maintenance and replacement, which increases the cost of equipment use and downtime, and reduces the reliability of the system.

[0009] II. Technical Defects of Existing Electromagnetic Drive Solutions

[0010] To address the response speed issue of traditional mechanical drives, electromagnetic drives (such as voice coil motor drives and piezoelectric ceramic drives) have been applied in some low-to-medium precision scenarios. However, existing designs still have the following key technical shortcomings:

[0011] Insufficient driving force density: The output thrust to volume ratio of a single drive module is low, making it difficult to provide sufficient acceleration when driving large or heavy focusing components, resulting in limited dynamic response speed and an inability to meet the application requirements of "high load" and "high frequency response".

[0012] In summary, current mainstream driving solutions cannot simultaneously meet the comprehensive technical requirements of high-frequency response, micron-level positioning accuracy, and high stability, thus hindering the application expansion of optical dynamic focusing systems in high-end optics. Therefore, developing a design method for a dynamic focusing drive mechanism that balances high-frequency response characteristics, high-precision positioning capabilities, and long-term stability has become a key technical problem urgently needing to be solved in this field. Summary of the Invention

[0013] To address the issue that current mainstream driving solutions cannot simultaneously meet the requirements of high-frequency response, micron-level positioning accuracy, and high stability, this application provides a driving device for laser dynamic focusing.

[0014] The driving device for laser dynamic focusing provided in this application adopts the following technical solution:

[0015] A driving device for laser dynamic focusing includes a driving module and a focusing element module. The driving module includes a base, a magnetic core, and a coil frame. A sleeve is integrally formed on the side of the base, and the coil frame is installed inside the sleeve. A coil is wound around the outer recessed part of the coil frame, and the magnetic core is disposed in the hollow position inside the coil frame. Two driving modules are provided, and the two driving modules are symmetrically arranged along the axial direction of the magnetic core. The focusing element module is installed between the two magnetic cores.

[0016] Optionally, it also includes a base and a detector module; both the detector module and the drive module are mounted on one side of the base; the base is mounted on the top surface of the base, and the focusing element module is located between the drive module and the detector module; a light-shielding plate is mounted on the focusing element module, the light-shielding plate extends into the detector module, and the detector module is used to detect and acquire the position of the light-shielding plate.

[0017] Optionally, the focusing element module is slidably connected to the base via a guide rail assembly.

[0018] Optionally, the focusing element module includes a lens mounting structure, a first connecting part, and a second connecting part; the lens mounting structure is slidably connected to the top surface of the base plate via a guide rail assembly, and the lens mounting structure is used to mount a lens; the first connecting part is connected to one side of the lens mounting structure and is located between two magnetic cores, the second connecting part is connected to the other side of the lens mounting structure, and a light shield is connected to the end of the second connecting part facing the detector module.

[0019] Optionally, buffer pads are installed on both sides of the first connecting part, and the magnetic core passes through the buffer pads.

[0020] Optionally, the lens mounting structure includes a base plate and a lens mounting ring. The base plate is slidably connected to the top surface of the base via a guide rail assembly. The lens mounting ring is connected to the top surface of the base plate and is used to mount a lens. The peripheral surface of the lens is in contact with the inner wall of the lens mounting ring. The first connecting part and the second connecting part are both connected to the connection between the lens mounting ring and the base plate.

[0021] Optionally, the circumferential surface of the lens mounting ring is provided with multiple through slots that penetrate both sides of the lens mounting ring, and a first heat dissipation fin is formed between adjacent through slots.

[0022] Optionally, a heat dissipation pipe is provided on one side of the lens mounting ring. The heat dissipation pipe is arranged around the circumference of the lens, and the part of the heat dissipation pipe near the base plate is laid on the top surface of the base plate. Multiple second heat dissipation fins are connected to the top surface of the base plate. The second heat dissipation fins are arranged along the direction of lens movement, and the heat dissipation pipe located on the top surface of the base plate passes through the second heat dissipation fins. The heat dissipation pipe contains a heat-conducting liquid.

[0023] Optionally, the lens mounting ring has a receiving groove on the side near the heat pipe for the heat pipe to be accommodated, and the first heat dissipation fin is attached to the outer wall of the heat pipe.

[0024] Optionally, a cylinder is mounted on the top surface of the base plate, the cylinder being positioned along the direction of lens movement and connected to the heat dissipation pipe; a counterweight is installed inside the cylinder, the counterweight being slidably connected to the inner wall of the cylinder, and a through hole is provided inside the counterweight, extending through both ends; multiple guide rods are connected to one end face of the counterweight, the multiple guide rods being evenly distributed around the circumference of the counterweight; a movable plate is provided on the end face of the counterweight near the guide rods, covering the through hole, multiple sliding rings sliding on the guide rods are connected to the periphery of the movable plate, and a retaining ring is connected to the end of the guide rod; a sealing gasket is connected to the side of the movable plate near the through hole, the sealing gasket covering the through hole.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. When the focusing element module moves, two symmetrically arranged driving modules work together to drive the focusing element module. Current is passed through the coil, and the coil generates a magnetic field. According to the principle of electromagnetic interaction, the magnetic field will generate an axial driving force on the magnetic core, thereby driving the focusing element module connected to the magnetic core and the light shield in the detector module to move synchronously and rapidly in a linear reciprocating motion along the axis of the magnetic core. By controlling the current direction of each coil, the relative motion direction of the magnetic core contained in the two driving modules is opposite to that of their respective coils, but the overall force direction is always consistent, thereby ensuring that the focusing element module can perform linear reciprocating motion smoothly and efficiently, improving the stability and accuracy of dynamic focusing.

[0027] 2. When the light-shielding plate moves with the focusing element module, it changes the optical path state inside the detector module. The detector module converts this optical path change into an electrical signal, and then calculates the real-time position of the focusing element module by processing the electrical signal, thereby achieving precise positioning of the lens and providing accurate feedback information for dynamic focus adjustment. The drive module can drive the light-shielding plate and the focusing element module in the detector module to move synchronously. This synchronous movement relationship is the key to ensuring the accuracy of position detection, ensuring that the detector module can obtain the position information of the focusing element module in real time and accurately.

[0028] 3. The main functions of setting rubber pads on both sides of the first connection part are twofold: first, to limit the movement distance of the magnetic core of the drive module, ensuring that the movement of the magnetic core is within the set stroke range, and preventing damage to the components due to overtravel; second, to buffer the impact of the first connection part on the end face of the coil skeleton in the drive module when the focusing element module moves to the limit position, reducing the impact force on the components, and improving the operational stability and service life of the mechanism. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the drive device according to Embodiment 1 of this application;

[0030] Figure 2 This is an exploded structural diagram of the driving device of Embodiment 1 of this application;

[0031] Figure 3 This is a cross-sectional structural schematic diagram of the driving device in Embodiment 1 of this application.

[0032] Figure 4 This is a schematic diagram of the structure of the driving device in Embodiment 2 of this application;

[0033] Figure 5 This is a schematic diagram of the structure of the focusing element module in Embodiment 2 of this application;

[0034] Figure 6 yes Figure 5 A magnified structural diagram of part A in the middle;

[0035] Figure 7 This is a cross-sectional structural diagram of the cylinder and counterweight in Embodiment 2 of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Base; 2. Detector module; 3. Drive module; 31. Base; 311. Sleeve; 32. Magnetic core; 33. Coil frame; 4. Focusing element module; 41. Lens mounting structure; 411. Base plate; 4111. Second heat dissipation fin; 412. Lens mounting ring; 4121. First heat dissipation fin; 4122. Receiving groove; 42. First connecting part; 421. Groove; 422. Annular mounting groove; 423. Buffer pad; 43. Second connecting part; 5. Guide rail assembly; 51. Slider; 52. Slide rail; 6. Light shield; 7. Heat dissipation pipe; 8. Cylinder; 81. Counterweight; 811. Through hole; 812. Guide rod; 813. Retaining ring; 82. Movable plate; 821. Slip ring; 822. Sealing gasket; 9. Lens. Detailed Implementation

[0038] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail. Example

[0039] Embodiment 1 of this application discloses a driving device for laser dynamic focusing. (Refer to...) Figure 1-3 The driving device includes a base 1, a detector module 2, a driving module 3, and a focusing element module 4. The detector module 2 and the driving module 3 are both mounted on one side of the base 1 and are located on opposite sides of the base 1. The driving module 3 includes a base 31, a magnetic core 32, and a coil frame 33. The base 31 is mounted on the top surface of the base 1, and a sleeve 311 is integrally formed on the side of the base 31. The coil frame 33 is installed inside the sleeve 311, and a coil (not shown in the figure) is wound around the outer recessed part of the coil frame 33. The magnetic core 32 is located in the hollow position inside the coil frame 33 and is made of a strong magnetic material. There are two driving modules 3, which are symmetrically arranged along the axis of the magnetic core 32. The focusing element module 4 is located between the driving module 3 and the detector module 2 and is installed between the two magnetic cores 32. The focusing element module 4 is slidably connected to the base 1 through a guide rail assembly 5. A light-shielding plate 6 is mounted on the focusing element module 4 and extends into the detector module 2. The detector module 2 is used to detect and acquire the position of the light-shielding plate 6.

[0040] When the focusing element module 4 moves, two symmetrically arranged driving modules 3 work together to drive the focusing element module 4, supplying current to the coil in the coil frame 33. The coil generates a magnetic field, which, according to the principle of electromagnetic interaction, generates an axial driving force on the magnetic core 32. This drives the focusing element module 4 connected to the magnetic core 32 and the light-shielding plate 6 in the detector module 2 to move synchronously and rapidly in a straight line along the axis of the magnetic core 32. By controlling the current direction of each coil, the relative motion direction of the magnetic core 32 contained in the two driving modules 3 is opposite to that of their respective coils, but the overall force direction is always consistent. This ensures that the focusing element module 4 can perform a smooth and efficient straight line reciprocating motion, improving the stability and accuracy of dynamic focusing.

[0041] When the light-shielding plate 6 moves with the focusing element module 4, it changes the optical path state inside the detector module 2. The detector module 2 converts this optical path change into an electrical signal, and then calculates the real-time position of the focusing element module 4 by processing the electrical signal, thereby achieving precise positioning of the lens and providing accurate feedback information for dynamic focus adjustment. The drive module 3 can drive the light-shielding plate 6 and the focusing element module 4 in the detector module 2 to move synchronously. This synchronous movement relationship is the key to ensuring the accuracy of position detection, ensuring that the detector module 2 can obtain the position information of the focusing element module 4 in real time and accurately.

[0042] The guide rail assembly 5 includes a slider 51 and a slide rail 52. The slide rail 52 is connected to the top surface of the base 1, and the slider 51 is slidably connected to the slide rail 52. The guide rail assembly 5 adopts a high-precision linear guide rail, which can ensure the guiding accuracy of the focusing element module 4 during linear motion and reduce motion deviation.

[0043] The focusing element module 4 includes a lens mounting structure 41, a first connecting part 42, and a second connecting part 43. The lens mounting structure 41 is slidably connected to the top surface of the base plate 411 via a guide rail assembly 5. The lens mounting structure 41 is used to mount the lens 9. The first connecting part 42 is integrally formed on one side of the lens mounting structure 41. The first connecting part 42 is located between two magnetic cores 32. Both sides of the first connecting part 42 are provided with grooves 421 for the ends of the two magnetic cores 32 to enter. The two magnetic cores 32 clamp the first connecting part 42. The second connecting part 43 is integrally formed on the other side of the lens mounting structure 41. The second connecting part 43 faces the detector module 2. The light shield 6 is connected to the end of the second connecting part 43 facing the detector module 2.

[0044] The lens mounting structure 41 includes a base plate 411 and a lens mounting ring 412. The base plate 411 is slidably connected to the top surface of the base 1 via the guide rail assembly 5. The base plate 411 is connected to the top surface of the slider 51. The lens mounting ring 412 is integrally formed on the top surface of the base plate 411. The lens mounting ring 412 is used to mount the lens 9. The peripheral surface of the lens 9 is in contact with the inner wall of the lens mounting ring 412. The first connecting part 42 and the second connecting part 43 are both integrally formed at the connection between the lens mounting ring 412 and the base plate 411.

[0045] On both sides of the first connecting part 42, there are annular mounting grooves 422 around the circumference of the groove 421. A buffer pad 423 is installed in the annular mounting groove 422. The buffer pad 423 has good elasticity and wear resistance. The buffer pad 423 is preferably a rubber pad. The magnetic core 32 passes through the rubber pad. The magnetic core 32 and the rubber pad are fitted with a gap. One side of the rubber pad extends out of the annular mounting groove 422. The rubber pad is made of rubber material with good elasticity and wear resistance.

[0046] The rubber pads on both sides of the first connecting part 42 serve two main purposes: first, to limit the movement distance of the magnetic core 32 of the drive module 3, ensuring that the movement of the magnetic core 32 is within the set stroke range, and preventing damage to the components due to overtravel; second, to buffer the impact of the first connecting part 42 on the end face of the coil frame 33 in the drive module 3 when the focusing element module 4 moves to the limit position, reducing the impact force on the components and improving the operational stability and service life of the mechanism.

[0047] The implementation principle of the driving device for laser dynamic focusing in Embodiment 1 of this application is as follows: When the focusing element module 4 is moved, the focusing element module 4 is driven by two symmetrically arranged driving modules 3. Current is passed into the coil in the coil frame 33, and the coil generates a magnetic field. According to the principle of electromagnetic interaction, the magnetic field will generate an axial driving force on the magnetic core 32, thereby driving the focusing element module 4 connected to the magnetic core 32 and the light shield 6 in the detector module 2 to move synchronously and quickly in a straight line along the axial direction of the magnetic core 32. By controlling the current direction of each coil, the relative motion direction of the magnetic core 32 contained in the two driving modules 3 is opposite to that of their respective coils, but the overall force direction is always consistent, thereby ensuring that the focusing element module 4 can perform a smooth and efficient straight line reciprocating motion, improving the stability and accuracy of dynamic focusing. Example

[0048] Embodiment 2 of this application discloses a driving device for laser dynamic focusing. The difference from Embodiment 1 is that, referring to... Figure 4-7The lens mounting ring 412 has multiple through slots on its circumference that pass through both sides of the lens mounting ring 412. A first heat dissipation fin 4121 is formed between adjacent through slots. The multiple first heat dissipation fins 4121 are divided into two groups, left and right, and the two groups of first heat dissipation fins 4121 are symmetrically arranged about the center line of the lens mounting ring 412.

[0049] After prolonged laser irradiation, heat accumulates on lens 9. Excessive heat can cause lens deformation, thus affecting the zoom effect. By providing multiple first heat dissipation fins 4121 on the lens mounting ring 412, the heat dissipation area of ​​the mounting ring is increased. Lens 9 transfers heat to lens mounting ring 412, and lens mounting ring 412 accelerates heat dissipation through the first heat dissipation fins 4121. Furthermore, during the rapid reciprocating movement of lens mounting ring 412, airflow can pass through the through slot, accelerating the dissipation of heat on lens mounting ring 412.

[0050] A heat dissipation pipe 7 is provided on one side of the lens mounting ring 412. The heat dissipation pipe 7 is arranged around the circumference of the lens 9. The part of the heat dissipation pipe 7 near the base plate 411 is laid on the top surface of the base plate 411. Multiple second heat dissipation fins 4111 are connected to the top surface of the base plate 411. The second heat dissipation fins 4111 are arranged along the movement direction of the lens 9. The heat dissipation pipe 7 located on the top surface of the base plate 411 passes through the second heat dissipation fins 4111. The heat dissipation pipe 7 contains a heat-conducting liquid, such as water or heat-conducting oil.

[0051] Since the heat pipe 7 is installed on the lens mounting ring 412, some of the heat on the lens mounting ring 412 is transferred to the heat pipe 7. The heat is then transferred to the second heat dissipation fin 4111 through the heat-conducting liquid inside the heat pipe 7, and the second heat dissipation fin 4111 dissipates the heat. Furthermore, during the rapid reciprocating movement of the base plate 411, the airflow flows through the gap between the second heat dissipation fins 4111, accelerating the dissipation of heat on the second heat dissipation fins 4111.

[0052] The lens mounting ring 412 has an arc-shaped receiving groove 4122 on the side near the heat sink 7 for the heat sink 7 to be accommodated. The part of the heat sink 7 located on the side of the lens mounting ring 412 is located in the arc-shaped receiving groove 4122 and is attached to the inner wall of the arc-shaped receiving groove 4122; the first heat dissipation fin 4121 is attached to the outer wall of the heat sink 7.

[0053] By retracting the heat sink 7 into the arc-shaped receiving groove 4122, it is possible to prevent the heat sink 7 from being irradiated by the laser and causing laser reflection. At the same time, the heat sink 7 has a closer contact with the first heat sink fin 4121 and the lens mounting ring 412, so that the heat on the lens mounting ring 412 can be transferred to the heat sink 7 more quickly and efficiently.

[0054] A cylinder 8 is mounted on the top surface of the base plate 411. The length of the cylinder 8 is set along the movement direction of the lens 9. The heat dissipation pipe 7 is cut off, and the two ends of the heat dissipation pipe 7 are sealed and connected to the two ends of the cylinder 8. A smooth counterweight 81 is set inside the cylinder 8. The counterweight 81 is cylindrical and is slidably connected to the inner wall of the cylinder 8. A through hole 811 is set inside the counterweight 81, which passes through both ends. Four guide rods 812 are connected to one end face of the counterweight 81. The four guide rods 812 are evenly distributed around the circumference of the counterweight 81. A movable plate 82 is set on the end face of the counterweight 81 near the guide rods 812, covering the through hole 811. Four sliding rings 821 that slide on the guide rods 812 are connected to the circumference of the movable plate 82. A retaining ring 813 is connected to the end of the guide rod 812. A sealing gasket 822 is connected to the side of the movable plate 82 near the through hole 811, and the sealing gasket 822 covers the through hole 811.

[0055] When the base plate 411 drives the cylinder 8 to move rapidly back and forth, due to the weight of the counterweight 81 and its sliding against the inner wall of the cylinder 8, the counterweight 81 exhibits a lag, meaning that the cylinder 8 moves one step ahead of the counterweight 81, causing relative movement between the cylinder 8 and the counterweight 81. When the counterweight 81 moves towards the end where the movable plate 82 is located, the movable plate 82 is subjected to the pressure of the heat-conducting liquid inside the cylinder 8, causing the sealing gasket 822 on the movable plate 82 to adhere to the end face of the counterweight 81. The sealing gasket 822 seals the through hole 811. The counterweight 81, in conjunction with the movable plate 82, pushes the heat-conducting liquid, causing the heat-conducting liquid... The liquid flows in one direction within the heat dissipation pipe 7. When the counterweight 81 moves away from the movable plate 82, the movable plate 82 is subjected to the pressure of the heat-conducting liquid in the cylinder 8, causing the sealing gasket 822 on the movable plate 82 to disengage from the through hole 811. The heat-conducting liquid in the cylinder 8 flows from one end of the counterweight 81 to the end where the movable plate 82 is located. Using the above reciprocating motion, the counterweight 81, in conjunction with the movable plate 82, pushes the heat-conducting liquid to flow in one direction, enabling the heat-conducting liquid in the heat dissipation pipe 7 to circulate and accelerate the transfer of heat from the lens mounting ring 412 to the second heat dissipation fin 4111.

[0056] The implementation principle of a driving device for laser dynamic focusing in Embodiment 2 of this application is as follows: a first heat dissipation fin 4121 and a second heat dissipation fin 4111 are provided on the focusing element module 4. The first heat dissipation fin 4121 and the second heat dissipation fin 4111 accelerate the heat dissipation on the lens mounting bracket, which is beneficial to protecting the lens 9.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A driving device for dynamic laser focusing, characterized in that: The system includes a base (1), a detector module (2), a drive module (3), and a focusing element module (4). The drive module (3) includes a base (31), a magnetic core (32), and a coil frame (33). The base (31) has an integrally formed sleeve (311) on its side. The coil frame (33) is installed inside the sleeve (311). A coil is wound around the outer recessed part of the coil frame (33). The magnetic core (32) is located in the hollow position inside the coil frame (33). There are two drive modules (3), which are symmetrically arranged along the axis of the magnetic core (32). The focusing element module (4) is installed between the two magnetic cores (32). The detector module (2) and the drive module (3) are both mounted on one side of the base (1); the base (31) is mounted on the top surface of the base (1), and the focusing element module (4) is located between the drive module (3) and the detector module (2); a light shield (6) is mounted on the focusing element module (4), the light shield (6) extends into the detector module (2), and the detector module (2) is used to detect and acquire the position of the light shield (6); The focusing element module (4) is slidably connected to the base (1) via the guide rail assembly (5); The focusing element module (4) includes a lens mounting structure (41), a first connecting part (42), and a second connecting part (43). The lens mounting structure (41) is slidably connected to the top surface of the base plate (411) via a guide rail assembly (5). The lens mounting structure (41) is used to mount a lens (9). The first connecting part (42) is connected to one side of the lens mounting structure (41). The first connecting part (42) is located between two magnetic cores (32). The second connecting part (43) is connected to the other side of the lens mounting structure (41). The light shield (6) is connected to the end of the second connecting part (43) facing the detector module (2).

2. The driving device for laser dynamic focusing according to claim 1, characterized in that: The first connecting part (42) has buffer pads (423) installed on both sides, and the magnetic core (32) passes through the buffer pads (423).

3. The driving device for laser dynamic focusing according to claim 1, characterized in that: The lens mounting structure (41) includes a base plate (411) and a lens mounting ring (412). The base plate (411) is slidably connected to the top surface of the base (1) via a guide rail assembly (5). The lens mounting ring (412) is connected to the top surface of the base plate (411). The lens mounting ring (412) is used to mount the lens (9). The peripheral surface of the lens (9) is attached to the inner wall of the lens mounting ring (412). The first connecting part (42) and the second connecting part (43) are both connected to the connection between the lens mounting ring (412) and the base plate (411).

4. The driving device for laser dynamic focusing according to claim 3, characterized in that: The lens mounting ring (412) has multiple through slots on its circumference that pass through both sides of the lens mounting ring (412), and a first heat dissipation fin (4121) is formed between adjacent through slots.

5. A driving device for laser dynamic focusing according to claim 4, characterized in that: A heat dissipation pipe (7) is provided on one side of the lens mounting ring (412). The heat dissipation pipe (7) is arranged around the circumference of the lens (9). The part of the heat dissipation pipe (7) near the base plate (411) is laid on the top surface of the base plate (411). Multiple second heat dissipation fins (4111) are connected to the top surface of the base plate (4111). The second heat dissipation fins (4111) are arranged along the movement direction of the lens (9). The heat dissipation pipe (7) located on the top surface of the base plate (411) passes through the second heat dissipation fins (4111). The heat dissipation pipe (7) contains a heat-conducting liquid.

6. A driving device for laser dynamic focusing according to claim 5, characterized in that: The lens mounting ring (412) has a receiving groove (4122) on the side near the heat sink (7) for the heat sink (7) to be accommodated, and the first heat sink fin (4121) is attached to the outer wall of the heat sink (7).

7. A driving device for laser dynamic focusing according to claim 5, characterized in that: A cylinder (8) is mounted on the top surface of the base plate (411). The cylinder (8) is positioned along the direction of movement of the lens (9) and is connected to the heat dissipation pipe (7). A counterweight (81) is installed inside the cylinder (8). The counterweight (81) slides on the inner wall of the cylinder (8). A through hole (811) is provided inside the counterweight (81) that extends through both ends. A guide rod (812) is connected to one end face of the counterweight (81). A movable plate (82) covering the through hole (811) is provided on the end face near the guide rod (812). A slip ring (821) slidably connected to the guide rod (812) is connected to the periphery of the movable plate (82). A retaining ring (813) is connected to the end of the guide rod (812). A sealing gasket (822) is connected to the side of the movable plate (82) near the through hole (811). The sealing gasket (822) covers the through hole (811).

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