Laser scanning device with rear galvanometer, using method and beauty treatment instrument

Abstract

The invention relates to the technical field of photoelectric precision instruments, in particular to a laser scanning device with a rear galvanometer, a using method of the laser scanning device and a beauty treatment instrument using the laser scanning device. The laser scanning device comprises a laser head assembly, a shaper, a scanning galvanometer assembly, a beam shrinking lens group, a total reflective mirror, a light guide arm assembly, a beam expanding lens group and a focusing field lens. The laser head assembly emits a laser beam with adjustable parameters, and the laser beam is shaped by the shaper and then scanned by the X-axis scanning galvanometer and the Y-axis scanning galvanometer to form a set shape. The beam shrinking lens group shrinks laser beams, the total reflective mirror changes the conduction direction of the laser beams, the light guide arm assembly conducts the laser beams, the beam expanding lens group restores and expands the laser beams, and finally the laser beams are focused by the focusing field lens. The device has the characteristics of compact structure and stable performance. The invention further provides a using method of the device. The using method comprises the steps of laser beam emitting, shaping, scanning, beam shrinking, conduction direction changing, conduction, beam expanding, focusing and the like. Finally, the invention provides a beauty treatment instrument applying the laser scanning device with the rear galvanometer.

Description

Technical Field

[0001] The present invention relates to the technical field of photoelectric precision instruments, and in particular to a laser scanning device with a galvanometer mounted behind it, and also to a laser scanning device with a galvanometer mounted behind it and a beauty treatment device using the same. Background Art

[0002] In the field of photoelectric treatment equipment, the laser scanning device is its core component, and its performance and structural layout play a vital role in the treatment effect, ease of operation and overall aesthetics of the equipment. However, the laser scanning device design commonly used in current medical aesthetic treatment devices places the galvanometer in front of the light guide arm outlet, which has many technical deficiencies.

[0003] First of all, from the perspective of appearance design, the front placement of the galvanometer makes its driving line directly exposed outside the light guide arm, which not only destroys the overall aesthetics of the equipment, but may also weaken the stability of the equipment due to the disorder of the driving line, affecting the user's visual experience and usage feeling.

[0004] Secondly, in terms of optical performance, the front-mounted design of the galvanometer increases the risk of damage. Since the galvanometer needs to move with the light guide arm, it is more susceptible to external environmental factors such as dust and vibration. These factors are likely to have a negative impact on the accuracy and stability of the galvanometer, thereby damaging the transmission quality of the laser beam and reducing the treatment effect. In addition, the poor dustproof effect is also a significant disadvantage of the front-mounted galvanometer design. The accumulation of dust will further weaken the optical performance.

[0005] Finally, in terms of the use of the whole machine, the drive line caused by the front galvanometer is prone to entanglement during use. This not only limits the flexibility of the light guide arm to achieve 360° rotation, but also may cause unnecessary mechanical stress to the galvanometer and light guide arm due to the change in tension caused by the entanglement, thereby damaging the long-term stability and service life of the equipment. At the same time, the entanglement of the drive line also increases the complexity of operation and the difficulty of maintenance, seriously reducing the user experience.

[0006] Therefore, the industry urgently needs an improved laser scanning device design to effectively solve the many problems in appearance, optical performance and overall use caused by the front galvanometer. Summary of the invention

[0007] One of the purposes of the present invention is to provide a laser scanning device with a galvanometer at the rear. By optimizing the layout design of the galvanometer and the light guide arm, the galvanometer drive line is hidden, the optical performance is improved, and the rotational freedom of the light guide arm is increased, thereby improving the practicability and stability of the device.

[0008] In order to solve the above technical problems, the present invention provides a laser scanning device with a galvanometer rear-mounted, comprising: The laser head assembly serves as an emission port of the laser beam and emits a laser beam with adjustable parameters.

[0009] The shaper is connected to the laser head assembly to shape the laser beam emitted by the laser head assembly to form a collimated and homogenized light spot.

[0010] The scanning galvanometer assembly includes an X-axis scanning galvanometer and a Y-axis scanning galvanometer, which form a two-dimensional scanning galvanometer for scanning the shaped laser beam.

[0011] The beam reduction mirror group is arranged behind the scanning galvanometer assembly and is used to reduce the shape of the scanned laser beam.

[0012] The total reflection mirror is installed on an adjustable mirror holder with an adjustable installation angle of 45°, and is used to change the transmission direction of the laser beam after being reduced by the beam reduction mirror group.

[0013] The light guide arm assembly is used to conduct the laser beam transmitted by the total reflection mirror.

[0014] The beam expander lens group is arranged at the exit of the light guide arm and is used to restore the laser beam that has passed through the light guide arm.

[0015] The focusing field lens is arranged behind the beam expander lens group and is used to focus the laser beam.

[0016] In addition to the above technical features, this application also makes improvements in the following aspects: In some embodiments, the spatial installation positions of the X-axis scanning galvanometer and the Y-axis scanning galvanometer are perpendicular to each other, and the laser beam forms a set scanning shape after being scanned by the X-axis scanning galvanometer and the Y-axis scanning galvanometer.

[0017] In some embodiments, the scanning shape formed by the laser beam after being scanned by the X-axis scanning galvanometer mirror and the Y-axis scanning galvanometer mirror is formed by the rotation angle of the X-axis scanning galvanometer mirror and the Y-axis scanning galvanometer mirror.

[0018] In some embodiments, the light guide arm assembly includes multiple groups of light guide arms that are distributed in a rotational manner, and multiple light guide arm reflectors are installed inside to form a reflective light guide path inside the light guide arm assembly; the joints where each group of light guide arms is combined can rotate 360° in the circumferential direction.

[0019] In some embodiments, the diameter of the laser beam that can be received by the light guide arm reflector is no greater than Φ30 mm, and it is installed at the joint where each set of light guide arms is combined, at an angle of 45° to the axis, for reflecting the conducted laser.

[0020] In some embodiments, the beam reducing mirror group includes a first plano-convex mirror and a first plano-concave mirror, and the lens spacing between the first plano-convex mirror and the first plano-concave mirror is set to 71.5 to 72.5 mm (72 mm), which is used to reduce the shape of the scanned light beam to a diameter range of 0.5 mm to 1 mm.

[0021] In some embodiments, the beam expander lens group includes a second plano-concave mirror and a second plano-convex mirror, and the lens spacing between the second plano-concave mirror and the second plano-convex mirror is 71.5-72.5 mm, which is used to restore the laser beam after the beam is expanded and passes through the light guide arm.

[0022] In some embodiments, the lens coating parameters of the X-axis scanning galvanometer, the Y-axis scanning galvanometer, the total reflection mirror and the light guide arm reflection mirror are 1030nm ultrafast laser reflection film, the reflectivity is greater than 99%, the incident angle is 45°, the damage threshold is greater than 0.025J / cm²@1030nm, 370fs, 50KHz, Φ1mm.

[0023] In some embodiments, the lens coating parameters of the beam reducer, beam expander, and focusing field lens are as follows: the transmittance at 1030nm is greater than 98%, the eccentricity is no greater than 3arcmin, and the damage threshold is greater than 2J / cm²@1030nm, 370fs, and 50KHz.

[0024] In some embodiments, when the scanning angles of the X-axis scanning galvanometer and the Y-axis scanning galvanometer are satisfied so that the laser beam can be completely emitted from the light guide arm outlet, the deflection angle of the laser beam is twice the deflection angle of the X-axis scanning galvanometer and the Y-axis scanning galvanometer, and the deflection angle range of the X-axis scanning galvanometer and the Y-axis scanning galvanometer is 0.275°≤θ≤0.525°.

[0025] A second object of the present invention is to provide a method for using a laser scanning device with a galvanometer post-mounted, which uses the above-mentioned laser scanning device with a galvanometer post-mounted, and comprises the following steps: emitting a laser beam with adjustable parameters through a laser head assembly; The laser beam emitted by the laser head assembly is shaped by a shaper to form a collimated and homogenized light spot; The shaped laser beam is scanned by the X-axis scanning galvanometer and the Y-axis scanning galvanometer to form a set scanning shape determined by the rotation angle; Use a beam reduction lens group to reduce the shape of the scanned laser beam to a diameter range of 0.5mm to 1mm; The transmission direction of the laser beam after being reduced by the beam reducing mirror group is changed at an installation angle of 45° through a total reflective mirror installed on an adjustable mirror mount; The laser beam transmitted by the total reflection mirror is conducted by the light guide arm assembly to form a reflective light guide path inside the light guide arm assembly; The beam expander group at the exit of the light guide arm restores the laser beam after the beam expansion through the light guide arm and transmits it to the focusing field lens; The laser beam is focused by a focusing field lens.

[0026] The third object of the present invention is to provide a beauty treatment device, which uses the laser scanning device with a galvanometer rear-mounted.

[0027] By adopting the above technical solution, the present invention has at least one of the following beneficial effects: 1. Optimize layout and hide driving lines: This application successfully hides the drive line of the galvanometer by placing the galvanometer (X-axis scanning galvanometer and Y-axis scanning galvanometer) at the rear and optimizing the layout design of the galvanometer and the light guide arm. This improvement not only makes the appearance of the device neater, but also reduces the impact of the drive line on the operating stability of the device, thereby improving the stability and practicality of the device.

[0028] 2. Improve optical performance and reduce energy loss: The present application provides a shaper for shaping the laser beam emitted by the laser head assembly to form a collimated and homogenized light spot, thereby improving the quality of the laser beam.

[0029] The design of the beam reducer and expander ensures that the shape and energy distribution of the laser beam are precisely controlled during scanning, transmission and focusing, further improving the optical performance.

[0030] The selection of lens coating parameters, such as 1030nm ultrafast laser reflective film and coating with transmittance greater than 98%, effectively improves the reflectivity and transmittance of the laser and reduces energy loss.

[0031] 3. Increase the rotational freedom of the light guide arm: In the present application, the light guide arm assembly adopts multiple groups of light guide arms in a rotating distribution, and the joints where each group of light guide arms is combined can rotate 360 ​​degrees in the circumferential direction. This design greatly increases the flexibility and adaptability of the light guide arm. This design enables the laser scanning device to adapt to a variety of working scenarios and installation requirements, and improves the practicality and versatility of the device.

[0032] 4. High-precision scanning and focusing: The X-axis scanning galvanometer and the Y-axis scanning galvanometer are installed perpendicular to each other in space. By precisely controlling the rotation angle of the two, a set scanning shape can be formed. When certain conditions are met, the deflection angle of the laser beam is twice the deflection angle of the X-axis scanning galvanometer and the Y-axis scanning galvanometer. This design makes the control of the scanning angle more flexible and precise.

[0033] The setting of the focusing field lens enables the laser beam to be accurately focused after passing through the beam expander lens group, thereby improving the processing accuracy and efficiency.

[0034] 5. High reflectivity, transmittance and wide damage threshold range The selection of lens coating parameters, such as 1030nm ultrafast laser reflective film and coating with a transmittance greater than 98%, ensures low loss and high efficiency of the laser beam during transmission. The high damage threshold design of the lens enables the device to withstand higher energy laser beams without damage, broadening the application range of the device.

[0035] 6. Accurate deflection angle control: When certain conditions are met, the deflection angle of the laser beam is twice the deflection angle of the X-axis scanning galvanometer and the Y-axis scanning galvanometer, and the deflection angle range is precisely controlled within 0.275°≤θ≤0.525°. This design ensures the accuracy and stability of the scanning.

[0036] In summary, the laser scanning device with a rear galvanometer has achieved remarkable technical effects through innovative designs such as optimizing layout design, improving optical performance, increasing the rotation freedom of the light guide arm, enhancing device stability and practicality, and precisely controlling the scanning shape and angle. It provides a more efficient, flexible and reliable solution for the application of laser scanning technology and meets more diverse application needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0038] Figure 1 It is a structural schematic diagram of a laser scanning device with a galvanometer rear-mounted according to the present invention; Figure 2 It is a side view of the laser scanning device with a galvanometer rear-mounted according to the present invention; Figure 3 This is a working principle diagram of the laser scanning device with a galvanometer rear-mounted according to the present invention; Figure 4 The figure is a schematic diagram of the optical trajectory in the laser scanning device with the galvanometer rear-mounted according to the present invention.

[0039] The numbers in the figure are as follows: 1. Laser head assembly; 2. Shaper; 3. X-axis scanning galvanometer; 4. Y-axis scanning galvanometer; 5. Beam reducing mirror group; 51. First plano-convex mirror; 52. First plano-concave mirror; 6. Total reflection mirror; 7. Light guide arm reflector; 8. Light guide arm; 9. Beam expanding mirror group; 91. Second plano-concave mirror; 92. Second plano-convex mirror; 10. Focusing field mirror. DETAILED DESCRIPTION

[0040] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is by no means intended to limit the present invention and its application or use. The present invention can be implemented in other different forms and is not limited to the embodiments described herein.

[0041] It should be noted that those skilled in the art explicitly and implicitly understand that the embodiments described in the present invention can be combined with other embodiments without conflict. Unless otherwise defined, the technical terms or scientific terms involved in the present invention should have the common meanings understood by people with ordinary skills in the technical field to which the present invention belongs.

[0042] The words "a", "an", "a", "the" and the like involved in the present invention do not indicate quantity limitation and may indicate singular or plural. The terms "include", "comprises", "has" and any variations thereof involved in the present invention are intended to cover non-exclusive inclusions; the terms "first", "second", "third" and the like involved in the present invention are merely used to distinguish similar objects and do not represent a specific ordering of the objects.

[0043] The laser scanning device in the existing medical aesthetic treatment device adopts a galvanometer front design. This design not only affects the overall aesthetics of the device and makes the drive line messy, but also increases the risk of damage to the galvanometer. Since it moves with the light guide arm, it is easily affected by external environments such as dust and vibration, which damages the optical performance. In addition, the front galvanometer makes the drive line easy to tangle, which limits the rotation flexibility of the light guide arm, causes mechanical stress to the device, and affects stability and life. At the same time, the winding of the drive line also increases the complexity of operation and the difficulty of maintenance, reducing the user experience.

[0044] Based on the above problems, the present invention particularly provides a technical solution to solve the above problems. The technical solution, working principle and technical effects of the present invention are described in detail below in conjunction with specific embodiments.

[0045] Reference Figure 1 , Figure 2 , Figure 3 As shown, the present invention provides a laser scanning treatment device with a galvanometer post-positioned, and the specific implementation of the device is as follows: 1. Device components and connection relationships The laser scanning therapy device of the present invention mainly includes the following components: a 1030nm laser head 1, a shaper 2, an X-axis scanning galvanometer 3, a Y-axis scanning galvanometer 4, a beam reducing mirror group 5, a 1030nm total reflection mirror 6, a light guide arm assembly (including a light guide arm 8 and a light guide arm reflector 7), a beam expanding mirror group 9 and a focusing field lens 10.

[0046] The 1030nm laser head 1 serves as the light outlet of the femtosecond laser and emits a 1030nm laser beam. Parameters such as laser energy and repetition rate can be adjusted according to the final treatment object. The spot diameter of the emitted laser beam is about 1 to 2mm.

[0047] The shaper 2 is connected to the 1030nm laser head 1 by screw thread or other fixing methods. The function of the shaper 2 is to shape the laser beam emitted by the laser head assembly to form a collimated and homogenized light spot to improve the quality of the laser beam.

[0048] The X-axis scanning galvanometer 3 and the Y-axis scanning galvanometer 4 form a two-dimensional scanning galvanometer.

[0049] The X-axis scanning galvanometer mirror 3 and the Y-axis scanning galvanometer mirror 4 are installed at perpendicular positions to each other, and the laser beam forms a set scanning shape after scanning through the two. The scanning shape is formed by controlling the rotation angle of the X-axis scanning galvanometer mirror 3 and the Y-axis scanning galvanometer mirror 4.

[0050] The beam reduction mirror group 5 is arranged behind the scanning galvanometer assembly, and is used to reduce the shape of the scanned laser beam to a diameter range of 0.5mm to 1mm, but does not change the beam direction. The beam reduction mirror group 5 is composed of a first plano-convex mirror 51 and a first plano-concave mirror 52, and the lens spacing is set to 71.5 to 72.5mm (preferably 72mm).

[0051] The 1030nm total reflection mirror 6 is mounted on an adjustable mirror seat with a mounting angle of 45°, and is used to change the transmission direction of the laser beam after being reduced by the beam reduction mirror group 5 .

[0052] The light guide arm assembly comprises a light guide arm 8 and a light guide arm reflector 7 .

[0053] The light guide arm 8 is a hollow steel tube with a metal shell, and is about 0.8 to 1.5 meters long. A plurality of (eg, 7) light guide arm reflectors 7 are installed inside the light guide arm to form a reflective light guide path inside the light guide arm assembly.

[0054] The joints where each set of light guide arms is connected can rotate 360 ​​degrees in the circumferential direction, which increases the flexibility and adaptability of the light guide arms.

[0055] The diameter of the laser beam that can be received by the light guide arm reflector 7 is not greater than Φ30mm. It is installed at the joint where each set of light guide arms is combined, and is installed at 45° with the axis to reflect the conducted laser.

[0056] The beam expander lens group 9 is arranged at the exit of the light guide arm 8, and is used to restore the laser beam that has expanded through the light guide arm. The beam expander lens group 9 is composed of a second plano-concave mirror 91 and a second plano-convex mirror 92, and the lens spacing is 71.5-72.5 mm (preferably 72 mm).

[0057] The focusing field lens 10 is arranged behind the beam expander lens group 9 and is used to focus the laser beam onto the treatment surface. The focusing field lens 10 is a replaceable lens, and its focal length is replaced according to the actual situation required.

[0058] 2. Working Principle and Operation Procedure like Figure 3 , Figure 4 As shown, laser emission and shaping: a 1030nm laser head 1 emits a laser beam, which is shaped by a shaper 2 to form a collimated and homogenized light spot.

[0059] Two-dimensional scanning: The shaped laser beam enters the two-dimensional scanning galvanometer (composed of the X-axis scanning galvanometer 3 and the Y-axis scanning galvanometer 4), and forms a set scanning shape by controlling the rotation angle of the two.

[0060] Beam reduction and direction change: The scanned laser beam is reduced in shape by the beam reduction mirror group 5, and then changes the transmission direction by the 1030nm total reflection mirror 6, and is transmitted upward to the entrance of the light guide arm 8.

[0061] Light guide arm conduction: The laser beam is reflected and conducted in the light guide arm 8 by a plurality of light guide arm reflectors 7. Each joint of the light guide arm 8 can rotate 360° in a certain direction, thereby increasing the flexibility of the laser beam outlet.

[0062] Beam expansion and focusing: The laser beam passes through the light guide arm 8 and then exits from the outlet, enters the beam expander lens group 9 to restore and expand the light spot, and finally passes through the focusing field lens 10 to focus on the treatment surface.

[0063] The specific usage process is as follows: During operation, the 1030nm laser is transmitted unidirectionally in the entire system. It is emitted by the 1030nm laser head 1, shaped by the shaper 2, and then enters the two-dimensional scanning galvanometer (X-axis scanning galvanometer 3 and Y-axis scanning galvanometer 4) for scanning. The laser beam is scanned by the X-axis scanning galvanometer and the Y-axis scanning galvanometer to form the required scanning shape, which is formed by controlling the rotation angle of the two. The scanned light enters the beam reduction mirror group 5, which reduces the shape of the beam but does not change the direction of the beam. The reduced light beam is changed in direction by the 1030nm total reflection mirror 6 and transmitted upward to the entrance of the light guide arm 8. In the light guide arm 8, the laser is reflected and transmitted by the light guide arm reflector 7, and then transmitted from the exit of the light guide arm 8. Subsequently, the laser is restored and expanded by the beam expansion mirror group 9, and then enters the focusing field lens 10 for focusing treatment. During the whole process, various components work together to achieve precise scanning and treatment of the laser.

[0064] 3. Lens coating parameters and other technical parameters Lens coating parameters: The lens coating parameters of the X-axis scanning galvanometer 3, Y-axis scanning galvanometer 4, 1030nm total reflection mirror 6 and light guide arm reflection mirror 7 are 1030nm ultrafast laser reflection film, with a reflectivity greater than 99%, an incident angle of 45°, a damage threshold greater than 0.025J / cm²@1030nm, 370fs, 50KHz, Φ1mm. The lens coating parameters of the beam reducer group 5, beam expander group 9 and focusing field lens 10 are 1030nm transmittance greater than 98%, eccentricity no greater than 3arcmin, and a damage threshold greater than 2J / cm²@1030nm, 370fs, 50KHz.

[0065] Deflection angle control: When the scanning angles of the X-axis scanning galvanometer 3 and the Y-axis scanning galvanometer 4 are such that the laser beam can be completely emitted from the exit of the light guide arm 8, the deflection angle of the laser beam is twice the deflection angle of the X-axis scanning galvanometer 3 and the Y-axis scanning galvanometer 4. The deflection angle range of the X-axis scanning galvanometer 3 and the Y-axis scanning galvanometer 4 is 0.275°≤θ≤0.525°.

[0066] Fourth, the main innovations of the present invention are embodied in the following aspects: (I) Optimizing the layout and hiding the drive lines: By placing the X-axis and Y-axis scanning galvanometers at the rear and optimizing the layout design of the galvanometers and light guide arms, the drive lines of the galvanometers were successfully hidden. This improvement not only makes the device look neater, but also reduces the impact of the drive lines on the stability of the device.

[0067] (II) Improving optical performance and reducing energy loss: The design of the shaper, beam reducer and beam expander ensures that the shape and energy distribution of the laser beam during scanning, transmission and focusing are precisely controlled. At the same time, the selection of lens coating parameters (such as 1030nm ultrafast laser reflective film and coating with a transmittance greater than 98%) effectively improves the reflectivity and transmittance of the laser and reduces energy loss.

[0068] (III) Increase the rotational freedom of the light guide arm: The light guide arm assembly uses multiple groups of light guide arms to be distributed in a rotating manner, and the joints where each group of light guide arms is combined can rotate 360° along the circumferential direction. This design greatly increases the flexibility and adaptability of the light guide arm, allowing the laser scanning device to adapt to a variety of work scenarios and installation requirements.

[0069] (IV) High-precision scanning and focusing: The spatial installation positions of the X-axis scanning galvanometer and the Y-axis scanning galvanometer are perpendicular to each other. By precisely controlling the rotation angles of the two, a set scanning shape can be formed. When certain conditions are met (such as the size of the reflector of the light guide arm and the range of the scanning light incident on the light guide arm, etc.), the deflection angle of the laser beam is twice the deflection angle of the X-axis scanning galvanometer and the Y-axis scanning galvanometer. This design makes the control of the scanning angle more flexible and precise. At the same time, the setting of the focusing field lens ensures that the laser beam can be accurately focused on the treatment surface after passing through the beam expander group.

[0070] (V) High reflectivity and transmittance and wide damage threshold range: The selection of lens coating parameters ensures low loss and high efficiency of laser beam transmission. The high damage threshold design of the lens enables the device to withstand higher energy laser beams without damage, thus broadening the application range of the device.

[0071] The laser scanning device with a galvanometer placed behind it provided in this embodiment achieves remarkable technical effects through innovative designs in many aspects, such as optimizing the layout design, improving the optical performance, increasing the rotational freedom of the light guide arm, enhancing the stability and practicality of the device, and accurately controlling the scanning shape and angle. The device provides a more efficient, flexible and reliable solution for the application of laser scanning technology, meeting more diverse application needs. For example, in the medical field, the device can be used for laser scanning treatment; in the industrial field, it can be used for high-precision processing scenarios such as laser cutting and laser welding.

[0072] The present invention also describes a method for using a laser scanning device with a galvanometer post-positioned, which uses the above-mentioned laser scanning device with a galvanometer post-positioned, and includes the following steps: a. Emitting a laser beam with adjustable parameters through a laser head assembly; b. Use a shaper to shape the laser beam emitted by the laser head assembly to form a collimated and homogenized light spot; c. Scanning the shaped laser beam by a two-dimensional scanning galvanometer assembly including an X-axis scanning galvanometer and a Y-axis scanning galvanometer, wherein the spatial installation positions of the X-axis scanning galvanometer and the Y-axis scanning galvanometer are perpendicular to each other, and the laser beam is scanned by the X-axis scanning galvanometer and the Y-axis scanning galvanometer to form a set scanning shape determined by the rotation angle; d. Use a beam reduction lens group to reduce the shape of the scanned laser beam to a diameter range of 0.5mm to 1mm; e. The direction of the laser beam after being reduced by the beam reducing mirror group is changed at a 45° installation angle by means of a total reflective mirror installed on an adjustable mirror mount; f. Using the light guide arm assembly to conduct the laser beam transmitted by the total reflective mirror, wherein the light guide arm assembly includes multiple groups of light guide arms distributed in rotation, multiple light guide arm reflectors are installed inside to form a reflective light guide path inside the light guide arm assembly, and the joints where each group of light guide arms is combined can rotate 360° along the circumferential direction; g. A beam expander lens group is provided at the exit of the light guide arm to restore the laser beam after the beam expansion passes through the light guide arm; h. Focus the laser beam through the focusing field lens.

[0073] The present invention further describes a beauty treatment instrument, which uses the laser scanning device with the galvanometer rear-mounted.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0075] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it; when the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A laser scanning device with a galvanometer rear-mounted, characterized in that: include, The laser head assembly (1) serves as a laser beam emission port and emits a laser beam with adjustable parameters; A shaper (2) connected to the laser head assembly (1) for shaping the laser beam emitted by the laser head assembly; A scanning galvanometer assembly, comprising an X-axis scanning galvanometer (3) and a Y-axis scanning galvanometer (4), which is used to scan the shaped laser beam; A beam reduction mirror assembly (5), arranged behind the scanning galvanometer assembly, is used to reduce the shape of the scanned laser beam; A total reflection mirror (6) is mounted on an adjustable mirror seat, the mounting angle of which is adjustable, and is used to change the transmission direction of the laser beam after being reduced by the beam reduction mirror group; A light guide arm assembly, used to conduct the laser beam transmitted by the total reflection mirror; A beam expander lens group (9) is arranged at the exit of the light guide arm (8) and is used to restore the laser beam that has been expanded and passed through the light guide arm; The focusing field lens (10) is arranged behind the beam expanding lens group (9) and is used to focus the laser beam.

2. The laser scanning device with a galvanometer post-positioned according to claim 1, characterized in that: The spatial installation positions of the X-axis scanning galvanometer (3) and the Y-axis scanning galvanometer (4) are perpendicular to each other, and the laser beam forms a set scanning shape after being scanned by the X-axis scanning galvanometer (3) and the Y-axis scanning galvanometer (4).

3. The laser scanning device with a galvanometer post-positioned according to claim 2, characterized in that: The scanning shape formed after the laser beam is scanned by the X-axis scanning galvanometer (3) and the Y-axis scanning galvanometer (4) is formed by the rotation angle of the X-axis scanning galvanometer (3) and the Y-axis scanning galvanometer (4).

4. The laser scanning device with a galvanometer post-positioned according to claim 1, characterized in that: The light guide arm assembly comprises a plurality of groups of light guide arms (8) which are rotatably distributed, and a plurality of light guide arm reflectors (7) are installed inside to form a reflective light guide path inside the light guide arm assembly; the joints where the light guide arms are combined can rotate 360 ​​degrees in the circumferential direction.

5. The laser scanning device with a galvanometer post-positioned according to claim 4, characterized in that: The diameter of the laser beam that can be received by the light guide arm reflector (7) is no greater than Φ30 mm, and is installed at the joint where each set of light guide arms is combined, at an angle of 45 degrees to the axis, for reflecting the conducted laser.

6. The laser scanning device with a galvanometer post-positioned according to claim 1, characterized in that: The beam reduction mirror group (5) comprises a first plano-convex mirror (51) and a first plano-concave mirror (52), wherein the lens spacing between the first plano-convex mirror (51) and the first plano-concave mirror (52) is set to 71.5-72.5 mm, and is used to reduce the shape of the scanned light beam to a diameter range of 0.5 mm-1 mm.

7. The laser scanning device with a galvanometer post-positioned according to claim 1, characterized in that: The beam expander lens group (9) comprises a second plano-concave mirror (91) and a second plano-convex mirror (92), wherein the lens spacing between the second plano-concave mirror (91) and the second plano-convex mirror (92) is 71.5-72.5 mm, and is used to restore the laser beam after the beam is expanded and passes through the light guide arm.

8. The laser scanning device with a galvanometer post-positioned according to claim 4, characterized in that: The lens coating parameters of the X-axis scanning galvanometer (3), the Y-axis scanning galvanometer (4), the total reflection mirror (6) and the light guide arm reflection mirror (7) are 1030nm ultrafast laser reflection film, with a reflectivity greater than 99%, an incident angle of 45°, a damage threshold greater than 0.025J / cm²@1030nm, 370fs, 50KHz, and Φ1mm.

9. The laser scanning device with a galvanometer post-positioned according to claim 1, characterized in that: The lens coating parameters of the beam reducing lens group (5), the beam expanding lens group (9) and the focusing field lens (10) are: a transmittance of greater than 98% at 1030nm, an eccentricity of no more than 3arcmin, and a damage threshold of greater than 2J / cm²@1030nm, 370fs, and 50KHz.

10. The laser scanning device with a galvanometer post-positioned according to claim 1, characterized in that: When the scanning angles of the X-axis scanning galvanometer (3) and the Y-axis scanning galvanometer (4) are satisfied so that the laser beam can be completely emitted from the outlet of the light guide arm (8), the deflection angle of the laser beam is twice the deflection angle of the X-axis scanning galvanometer (3) and the Y-axis scanning galvanometer (4), and the deflection angle range of the X-axis scanning galvanometer (3) and the Y-axis scanning galvanometer (4) is 0.275°≤θ≤0.525°.

11. A method for using a laser scanning device with a galvanometer post-mounted, using the laser scanning device with a galvanometer post-mounted according to any one of claims 1 to 10, characterized in that: The following steps are involved: emitting a laser beam with adjustable parameters through a laser head assembly; The laser beam emitted by the laser head assembly is shaped by a shaper to form a collimated and homogenized light spot; The shaped laser beam is scanned by the X-axis scanning galvanometer and the Y-axis scanning galvanometer to form a set scanning shape determined by the rotation angle; Use a beam reduction lens group to reduce the shape of the scanned laser beam to a diameter range of 0.5mm to 1mm; The transmission direction of the laser beam after being reduced by the beam reducing mirror group is changed at an installation angle of 45° through a total reflective mirror installed on an adjustable mirror mount; The laser beam transmitted by the total reflection mirror is conducted by the light guide arm assembly to form a reflective light guide path inside the light guide arm assembly; The beam expander group at the exit of the light guide arm restores the laser beam after the beam expansion through the light guide arm and transmits it to the focusing field lens; The laser beam is focused by a focusing field lens.

12. A beauty treatment device, characterized in that: A laser scanning device with a post-galvanometer as described in any one of claims 1 to 10 is used.

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