Reflection and reflection prevention equipment for laser

Abstract

The invention belongs to the technical field of lasers, and particularly relates to a laser anti-reflection device which comprises an emitting head, an anti-reflection ring and a pair of lifting mechanisms. The transmitting head is connected with a connector, and a pair of lenses is arranged in the transmitting head; the anti-reversion ring is arranged in the emitting head and arranged on the side, away from the connector, of the lens, a through hole is formed in the center of the anti-reversion ring in a penetrating mode, a cavity is formed in the anti-reversion ring, a liquid inlet pipe and a liquid outlet pipe are connected to the anti-reversion ring, and the liquid inlet pipe and the liquid outlet pipe are both communicated with the cavity; the pair of lifting mechanisms is symmetrically installed on the side wall of the emitting head and used for finely adjusting the anti-reverse ring. Through arrangement of corresponding mechanisms, reflected laser can be efficiently filtered, the problem that equipment is damaged by the reflected laser is effectively avoided, meanwhile, the reflected laser cannot enter the emission head again, secondary high temperature of the emission head is avoided, the fault rate of the emission head is greatly reduced, and the service life of the emission head is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of lasers, and in particular relates to a laser anti-back reflection device. Background Art

[0002] Laser is a device that uses the principle of stimulated radiation to amplify or oscillate light in certain excited substances. Lasers are generally composed of three parts: an excitation system, a laser substance, and an optical resonator. The excitation system is used to provide energy so that most electrons in the laser substance absorb energy and jump to the outer orbit of the atom, creating conditions for the subsequent emission of laser light. Laser substance is a substance used to generate laser light. The optical resonator is used to enhance the brightness of the output laser, and to adjust and select the wavelength and direction of the light. Lasers are widely used in industry, precision measurement and detection, communication and information processing, medical treatment, military affairs, and other fields due to their many advantages such as low cost and high precision.

[0003] Among them, laser welding is a method of welding using the principle of laser. Since laser has optical properties such as refraction and focusing, laser welding is very suitable for welding micro parts and parts with poor accessibility. However, when laser welding is used, especially when welding workpieces with high reflectivity, the laser is easily reflected by the workpiece, which not only easily affects the normal welding effect of the laser, but also the reflected laser is easy to damage the equipment, causing damage to the laser welding equipment, which has certain limitations.

[0004] For this reason, laser anti-reflection devices have appeared on the market. For example, the Chinese invention patent with publication number: CN108705192A discloses an anti-reflection device for a laser system, which includes a filter component and an offset component. The filter component includes a pair of lenses and a pinhole aperture. The pinhole aperture is used to block the reflection of the laser, which can play an anti-reflection role to a certain extent. However, when the device is in use, it only relies on the pinhole aperture to prevent reflection, and there is a problem of poor anti-reflection efficiency. At the same time, the pinhole aperture is set between a pair of lenses, and the reflected laser needs to enter the interior of the transmitter head to be blocked. The reflected laser entering the interior of the transmitter head will also increase the temperature inside the transmitter head, greatly increasing the probability of high-temperature damage to the transmitter head and shortening the service life of the transmitter head.

[0005] Therefore, in view of the above technical problems, it is necessary to provide a laser anti-reflection device. Summary of the invention

[0006] The object of the present invention is to provide a laser anti-reflection device to solve the problem of poor use effect of the above-mentioned laser anti-reflection device.

[0007] In order to achieve the above purpose, the technical solution provided by an embodiment of the present invention is as follows:

[0008] A laser anti-reflection device comprises a transmitter head, an anti-reflection ring and a pair of lifting mechanisms;

[0009] The transmitting head is connected with a connector, and a pair of lenses is arranged in the transmitting head;

[0010] The anti-reflection ring is arranged in the transmitting head and on the side of the lens away from the connecting head. A through hole is provided at the center of the anti-reflection ring. A cavity is provided in the anti-reflection ring. A liquid inlet pipe and a liquid outlet pipe are connected to the anti-reflection ring. Both the liquid inlet pipe and the liquid outlet pipe are in communication with the cavity.

[0011] A pair of lifting mechanisms are symmetrically installed on the side wall of the launch head, and the lifting mechanisms are used to fine-tune the anti-reverse ring.

[0012] Furthermore, a pair of slide grooves are provided on the inner wall of the transmitter head for sliding of the slider, and the slide grooves are provided on the lower side of the lens;

[0013] A slider is provided in the slide groove for sliding, and the slider is fixedly connected to the anti-reverse ring. The slider is used to slide in the slide groove to limit the sliding of the anti-reverse ring, thereby preventing the anti-reverse ring from shifting when fine-tuning in the transmitter head, thereby ensuring that the laser beam can pass through the through hole, so as to better carry out welding work without affecting the normal use of laser welding.

[0014] Furthermore, a stabilizing ring is provided in the transmitter head, and the stabilizing ring is provided between the lens and the anti-reflection ring. The stabilizing ring is used to stabilize the pull rope so that the pull rope can stably pull the anti-reflection ring, so that the anti-reflection ring can be stably fine-tuned in the transmitter head to avoid affecting the laser beam.

[0015] Furthermore, a light sensor is provided on one side of the anti-reflection ring close to the stabilizing ring. The light sensor is provided on the outside of the through hole and is used to sense the laser beam so that the laser beam can stably pass through the through hole, thereby avoiding the influence of the reflected laser on the lens to the greatest extent. At the same time, it can also avoid the reflected laser beam from entering the transmitter head and causing secondary high temperature in the transmitter head, thereby greatly reducing the failure rate of the transmitter head and ensuring the service life of the transmitter head.

[0016] Furthermore, a reflective film is provided on one side of the anti-reflection ring away from the stabilizing ring, so as to further enhance the effect of the anti-reflection ring in blocking the reflected laser and avoid the reflected laser from affecting the lens;

[0017] The reflective film includes a protective film for protecting the absorbing film;

[0018] An absorption film is provided on one side of the protective film close to the anti-reflection ring. An absorption liquid is provided in the absorption film. The absorption liquid can absorb the reflected laser again. At the same time, the absorption liquid can also absorb the heat generated by the reflected laser, thereby avoiding high temperature in the transmitter head caused by the reflected laser and reducing the overall failure rate of the transmitter head.

[0019] Furthermore, an adhesive layer is provided on one side of the absorption film away from the protective film, and the adhesive layer is connected to the anti-reflection ring. The adhesive layer is used to fix the reflective film so that the reflective film can be fixed on the surface of the anti-reflection ring, and then used to absorb and block reflected laser.

[0020] Furthermore, the absorption film is connected with a plurality of cooling tubes, which are inserted in the adhesion layer and communicated with the inside of the absorption film. When the absorption liquid absorbs the reflected laser, part of the absorption liquid will be vaporized, and the vaporized absorption liquid enters the cooling tube. The cooling tube contacts the anti-reverse ring. Since the anti-reverse ring continuously flows the cooling liquid, the overall temperature of the anti-reverse ring is relatively low, which can cool the vaporized absorption liquid in the cooling tube, so that the vaporized absorption liquid becomes liquid again, so that the absorption liquid can be recycled.

[0021] A connecting pipe is connected between the pair of cooling pipes, and the connecting pipe can further play a role in cooling and gasifying the absorption liquid;

[0022] A guide is arranged in the connecting pipe to prevent the cooled absorption liquid from remaining in the connecting pipe so as to facilitate the reuse of the absorption liquid.

[0023] Furthermore, the lifting mechanism comprises a box body, the box body is connected to the side wall of the launch head, and the box body is used to install the winding disk and the motor;

[0024] A winding disk and a motor are arranged in the box body, a belt is connected between the winding disk and the motor, the winding disk is used for winding the pull rope, and the motor drives the winding disk to rotate through the belt.

[0025] Furthermore, a pull rope is wound on the winding disk, one end of which passes through the transmitting head and the stabilizing ring and is connected to the anti-reverse ring. When the winding disk rotates, the winding disk will wind or release the pull rope, thereby achieving the lifting or lowering of the anti-reverse ring, so that the laser beam can better pass through the through hole for welding.

[0026] Furthermore, a pair of fixed pulleys are provided in the transmitter head, and the pair of fixed pulleys respectively correspond to the pair of pull ropes, and the fixed pulleys are used to guide the movement of the pull ropes to avoid wear of the fixed pulleys and the stabilizing ring, thereby increasing the service life of the pull ropes;

[0027] A bracket is connected between the fixed pulley and the inner wall of the transmitting head and is used for installing the fixed pulley.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] The present invention can perform efficient filtering on the reflected laser through the setting of corresponding mechanisms, effectively avoiding the problem of reflected laser damaging the equipment. At the same time, the reflected laser will not enter the interior of the transmitter head again, avoiding secondary high temperature of the transmitter head, thereby greatly reducing the failure rate of the transmitter head and ensuring the service life of the transmitter head. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A cross-sectional view of a laser anti-back reflection device in one embodiment of the present invention;

[0032] Figure 2 for Figure 1 Schematic diagram of the structure at A in the middle;

[0033] Figure 3 for Figure 1 Schematic diagram of the structure at B in the middle;

[0034] Figure 4 for Figure 1 Schematic diagram of the structure at C in the middle;

[0035] Figure 5 for Figure 1 Schematic diagram of the structure at D in the middle;

[0036] Figure 6 A cross-sectional view of a reflective film in one embodiment of the present invention;

[0037] Figure 7 for Figure 6 Schematic diagram of the structure at E in the middle;

[0038] Figure 8 A three-dimensional diagram of a laser anti-reflection device in one embodiment of the present invention;

[0039] Fig. 9 This is a three-dimensional view from another angle of a laser anti-reflection device in one embodiment of the present invention.

[0040] In the figure: 1. transmitter head, 101. connector, 102. lens, 103. slide groove, 104. slider, 105. stabilizing ring, 2. anti-reflection ring, 201. through hole, 202. cavity, 203. liquid inlet pipe, 204. liquid outlet pipe, 205. optical sensor, 206. reflective film, 2061. protective film, 2062. absorption film, 2063. absorption liquid, 2064. adhesion layer, 2065. cooling tube, 2066. connecting tube, 2067. guide, 3. lifting mechanism, 301. box, 302. winding disk, 303. motor, 304. belt, 305. pull rope, 306. fixed pulley. DETAILED DESCRIPTION

[0041] The present invention will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0042] The present invention discloses a laser anti-reflection device, referring to Figure 1-Figure 9 As shown, it includes a transmitting head 1, an anti-reverse ring 2 and a pair of lifting mechanisms 3.

[0043] The transmitting head 1 is connected with a connector 101 for connecting the transmitting head 1 to a laser, thereby realizing laser welding.

[0044] Preferably, the transmitter head 1 can be connected to a high-power semiconductor laser or a fiber laser.

[0045] In addition, the connector 101 is a QBH connector, the collimation distance of the QBH connector can be fine-tuned, and the QBH interface can be seamlessly connected to the fiber laser. In addition, the QBH connector adopts a sealed dustproof design, which can increase the service life of the lens 102.

[0046] Specifically, a pair of lenses 102 are provided in the transmitter head 1, and the lenses 102 are used to refract laser light.

[0047] Preferably, the focal length range of the lens 102 is 120-230 mm, and both sides of the lens 102 are coated with an anti-reflection film, and the transmittance of the anti-reflection film is greater than 99.8%.

[0048] In addition, a pair of slide grooves 103 are provided on the inner wall of the transmitter head 1. The slide grooves 103 are provided on the lower side of the lens 102 for sliding of the slider 104 so as to adjust the position of the anti-reflection ring 2 in the transmitter head 1 so that the laser can pass through the through hole 201 better.

[0049] Furthermore, a slider 104 is slidably provided in the slide groove 103, and the slider 104 is fixedly connected to the anti-reverse ring 2. The slider 104 is used to slide in the slide groove 103 to limit the sliding of the anti-reverse ring 2, so as to prevent the anti-reverse ring 2 from deviating during fine adjustment in the transmitter head 1, thereby ensuring that the laser beam can pass through the through hole 201, so as to better perform the welding work, and will not affect the normal use of laser welding.

[0050] refer to Figure 1-Figure 9 As shown, a stabilizing ring 105 is provided in the transmitter head 1, and the stabilizing ring 105 is provided between the lens 102 and the anti-reflection ring 2. The stabilizing ring 105 is used to stabilize the pull rope 305, so that the pull rope 305 can stably pull the anti-reflection ring 2, so that the anti-reflection ring 2 can be stably fine-tuned in the transmitter head 1 to avoid affecting the laser beam.

[0051] refer to Figure 1-Figure 9 As shown, the anti-reflection ring 2 is disposed in the transmitter head 1 and is disposed on the side of the lens 102 away from the connector 101 . The anti-reflection ring 2 is used to block the reflected laser to prevent the reflected laser from affecting the lens 102 and other components in the transmitter head 1 .

[0052] Preferably, the shape of the anti-reverse ring 2 is as follows: Figure 1 As shown, the anti-reflection ring 2 is made of sapphire material, which can ensure the absorption effect of the anti-reflection ring 2 on the reflected laser.

[0053] Among them, a through hole 201 is provided at the center of the anti-reflection ring 2, and the through hole 201 is used for the passage of the laser beam. The aperture of the through hole 201 is 2mm, so that the reflected laser at a large angle cannot pass through the through hole 201, thereby ensuring the blocking effect of the anti-reflection ring 2 on the reflected laser.

[0054] In addition, a cavity 202 is provided in the anti-reflection ring 2 to facilitate the passage of cooling water so as to cool the anti-reflection ring 2 as a whole, prevent the anti-reflection ring 2 from being deformed due to high temperature, and ensure that the anti-reflection ring 2 can normally block the reflected laser.

[0055] Specifically, the anti-reverse ring 2 is connected with a liquid inlet pipe 203 and a liquid outlet pipe 204, and both the liquid inlet pipe 203 and the liquid outlet pipe 204 are connected with the cavity 202. Cooling water enters the cavity 202 through the liquid inlet pipe 203 and is discharged through the liquid outlet pipe 204. The anti-reverse ring 2 is cooled by the circulating cooling water, which greatly improves the cooling effect of the anti-reverse ring 2.

[0056] In addition, a light sensor 205 is provided on one side of the anti-reflection ring 2 close to the stabilizing ring 105, and the light sensor 205 is provided outside the through hole 201. The light sensor 205 is used to sense the laser beam, so that the laser beam can stably pass through the through hole 201, avoiding the blocking of the laser beam by the anti-reflection ring 2. At the same time, it can also avoid the reflected laser beam from entering the transmitter head 1, causing secondary high temperature in the transmitter head 1, greatly reducing the failure rate of the transmitter head 1, and ensuring the service life of the transmitter head 1.

[0057] When adjusting the position of the anti-reflection ring 2, the optical sensor 205 can sense the laser beam, and then determine the position of the anti-reflection ring 2. That is, when the laser beam passes through the through hole 201, the optical sensor 205 can just identify the laser beam.

[0058] refer to Figure 1-Figure 9 As shown, a reflective film 206 is provided on one side of the anti-reflection ring 2 away from the stabilizing ring 105 , so as to further enhance the effect of the anti-reflection ring 2 in blocking the reflected laser and prevent the reflected laser from affecting the lens 102 .

[0059] The reflective film 206 includes a protective film 2061 for protecting the absorbing film 2062. The protective film 2061 is made of acrylic resin. The absorbing film 2062 is provided on the side of the protective film 2061 close to the anti-reflection ring 2. The absorbing film 2062 is a release film, and an absorbing liquid 2063 is provided in the absorbing film 2062. The absorbing liquid 2063 can absorb the reflected laser, and the absorbing liquid 2063 can also absorb the heat generated by the reflected laser, so as to avoid the high temperature in the transmitter head 1 caused by the reflected laser, and reduce the overall failure rate of the transmitter head 1.

[0060] Preferably, the absorption liquid 2063 is water or ethanol.

[0061] In addition, an adhesive layer 2064 is provided on one side of the absorption film 2062 away from the protection film 2061, and the adhesive layer 2064 is connected to the anti-reflection ring 2. The adhesive layer 2064 is used to fix the reflective film 206, so that the reflective film 206 can be fixed on the surface of the anti-reflection ring 2, and then used to absorb and block the reflected laser.

[0062] Specifically, a plurality of cooling tubes 2065 are connected to the absorption film 2062, and the cooling tubes 2065 are inserted in the adhesion layer 2064, and the cooling tubes 2065 are connected to the inside of the absorption film 2062. When the absorption liquid 2063 absorbs the reflected laser, part of the absorption liquid 2063 will be vaporized, and the vaporized absorption liquid 2063 enters the cooling tube 2065. The cooling tube 2065 is in contact with the anti-reverse ring 2. Since the anti-reverse ring 2 continuously flows the cooling liquid, the overall temperature of the anti-reverse ring 2 is relatively low, and then the vaporized absorption liquid 2063 in the cooling tube 2065 can be cooled, so that the vaporized absorption liquid 2063 becomes liquid again, so that the absorption liquid 2063 can be recycled.

[0063] Preferably, the cooling pipe 2065 and the connecting pipe 2066 are both made of heat-conducting materials, so as to better cool the vaporized absorption liquid 2063 .

[0064] In addition, a connecting pipe 2066 is connected between the pair of cooling pipes 2065 , and the connecting pipe 2066 can further cool down the gasified absorption liquid 2063 .

[0065] Furthermore, a guide 2067 is provided in the connecting tube 2066 to prevent the cooled absorption liquid 2063 from remaining in the connecting tube 2066 so as to facilitate the reuse of the absorption liquid 2063.

[0066] refer to Figure 1-Figure 9 As shown, a pair of lifting mechanisms 3 are symmetrically installed on the side wall of the transmitter head 1. The lifting mechanisms 3 are used to fine-tune the anti-reflection ring 2, so that the transmitter head 1 as a whole can be suitable for lasers of different models, thereby expanding the overall scope of application.

[0067] The lifting mechanism 3 includes a box 301 connected to the side wall of the launch head 1. The box 301 is used to install the winding disk 302 and the motor 303.

[0068] In addition, a winding disc 302 and a motor 303 are provided in the box body 301, and a belt 304 is connected between the winding disc 302 and the motor 303. The winding disc 302 is used to wind the pull rope 305, and the motor 303 drives the winding disc 302 to rotate through the belt 304.

[0069] Specifically, a pull rope 305 is wound around the winding disk 302, and one end of the pull rope 305 passes through the transmitter head 1 and the stabilizing ring 105 and is connected to the anti-reverse ring 2. When the winding disk 302 rotates, the winding disk 302 will wind or release the pull rope 305, thereby achieving the lifting or lowering of the anti-reverse ring 2, so that the transmitter head 1 as a whole can be applied to lasers of different models, expanding the overall application range, and at the same time, the laser beam can better pass through the through hole 201 for welding.

[0070] In addition, a pair of fixed pulleys 306 are provided in the transmitter head 1, and the pair of fixed pulleys 306 respectively correspond to the pair of pull ropes 305. The fixed pulleys 306 are used to guide the movement of the pull ropes 305 to avoid wear of the fixed pulleys 306 and the stabilizing ring 105, thereby increasing the service life of the pull ropes 305.

[0071] Furthermore, a bracket is connected between the fixed pulley 306 and the inner wall of the transmitting head 1 for installing the fixed pulley 306 .

[0072] When in use, the connector 101 is connected to the laser, and the laser beam generated by the laser enters the emitter head 1, is refracted by a pair of lenses 102, and converges on the workpiece through the through hole 201 on the anti-reflection ring 2.

[0073] When the laser beam encounters the workpiece and generates reflection, the laser beam reflected at a large angle will irradiate the anti-reflection ring 2. Due to the special shape of the anti-reflection ring 2, the blocking effect of the reflected laser beam can be improved. In addition, the reflected laser beam will also be absorbed by the absorption liquid 2063 in the absorption film 2062, preventing the reflected laser beam from passing through the anti-reflection ring 2 and entering the interior of the transmitter head 1.

[0074] When the absorption liquid 2063 absorbs the reflected laser, it can also absorb the heat generated by the reflected laser. As the absorption liquid 2063 continues to absorb the reflected laser heat, part of the absorption liquid 2063 will be vaporized, and the vaporized absorption liquid 2063 enters the cooling tube 2065. Since the cooling tube 2065 is in contact with the anti-reverse ring 2, and the cooling liquid continues to flow in the anti-reverse ring 2, the overall temperature of the anti-reverse ring 2 is relatively low, which can cool the vaporized absorption liquid 2063 in the cooling tube 2065, so that the vaporized absorption liquid 2063 becomes liquid again, so that the absorption liquid 2063 can be recycled.

[0075] In addition, part of the vaporized absorption liquid 2063 in the cooling tube 2065 will also be cooled through the connecting tube 2066 and flow back into the absorption membrane 2062, greatly improving the reuse effect of the absorption liquid 2063.

[0076] Furthermore, since the anti-reflection ring 2 is arranged at the port of the transmitter head 1, the reflected laser will be blocked at the port, which effectively prevents the reflected laser from entering the interior of the transmitter head 1, greatly reduces the secondary heat generated by the reflected laser in the transmitter head 1, avoids damage to the components in the transmitter head 1 due to high temperature, and greatly improves the service life of the transmitter head 1.

[0077] When the transmitter head 1 is replaced with a different laser, the refraction produced by the lens 102 will be different due to the different laser beams. The present application utilizes the lifting mechanism 3 to drive the anti-reflection ring 2 to move in the transmitter head 1, and then the position of the anti-reflection ring 2 in the transmitter head 1 can be adjusted, so that the laser beam can accurately pass through the through hole 201 and focus on the workpiece, avoiding the laser beam being blocked by the anti-reflection ring 2, thereby ensuring the overall use effect of the transmitter head 1.

[0078] When adjusting the position of the anti-reverse ring 2, the motor 303 drives the winding disk 302 to rotate through the belt 304, and the rotating winding disk 302 can wind or release the pull rope 305, and the pull rope 305 lifts or lowers the anti-reverse ring 2 through the fixed pulley 306. During the process of adjusting the anti-reverse ring 2, the light sensor 205 also senses light. When the light sensor 205 can sense the laser beam, the motor 303 is stopped. At this time, the laser beam can pass through the through hole 201 and focus on the workpiece, thereby completing the position adjustment of the anti-reverse ring 2, which is convenient for users to operate.

[0079] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0080] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A laser anti-reflection device, characterized in that: include: A transmitter head (1), the transmitter head (1) being connected to a connector (101), and a pair of lenses (102) being arranged inside the transmitter head (1); An anti-reflection ring (2) is arranged in the transmitting head (1) and on a side of the lens (102) away from the connecting head (101); a through hole (201) is provided at the center of the anti-reflection ring (2); a cavity (202) is provided in the anti-reflection ring (2); a liquid inlet pipe (203) and a liquid outlet pipe (204) are connected to the anti-reflection ring (2); and both the liquid inlet pipe (203) and the liquid outlet pipe (204) are in communication with the cavity (202); A pair of lifting mechanisms (3) are symmetrically mounted on the side walls of the launch head (1), and the lifting mechanisms (3) are used to fine-tune the anti-reverse ring (2).

2. The laser anti-reflection device according to claim 1, characterized in that: The inner wall of the transmitter head (1) is provided with a pair of slide grooves (103), the slide grooves (103) are arranged on the lower side of the lens (102), a slider (104) is slidably arranged in the slide grooves (103), and the slider (104) is fixedly connected to the anti-reverse ring (2).

3. The laser anti-reflection device according to claim 2, characterized in that: A stabilizing ring (105) is provided inside the transmitting head (1), and the stabilizing ring (105) is arranged between the lens (102) and the anti-reflection ring (2).

4. The laser anti-reflection device according to claim 3, characterized in that: A light sensor (205) is provided on a surface of the anti-reverse ring (2) close to the stabilizing ring (105), and the light sensor (205) is arranged outside the through hole (201).

5. The laser anti-reflection device according to claim 4, characterized in that: A reflective film (206) is provided on a side of the anti-reflection ring (2) away from the stabilizing ring (105), the reflective film (206) comprises a protective film (2061), an absorption film (2062) is provided on a side of the protective film (2061) close to the anti-reflection ring (2), and an absorption liquid (2063) is provided in the absorption film (2062).

6. The laser anti-reflection device according to claim 5, characterized in that: An adhesive layer (2064) is provided on a side of the absorption film (2062) away from the protective film (2061), and the adhesive layer (2064) is connected to the anti-reverse ring (2).

7. The laser anti-reflection device according to claim 6, characterized in that: A plurality of cooling tubes (2065) are connected to the absorption film (2062), and the cooling tubes (2065) are inserted into the adhesion layer (2064). The cooling tubes (2065) are communicated with the inside of the absorption film (2062). A connecting tube (2066) is connected between a pair of the cooling tubes (2065), and a guide member (2067) is provided inside the connecting tube (2066).

8. The laser anti-reflection device according to claim 7, characterized in that: The lifting mechanism (3) comprises a box (301), the box (301) is connected to the side wall of the launch head (1), a winding disk (302) and a motor (303) are arranged in the box (301), and a belt (304) is connected between the winding disk (302) and the motor (303).

9. The laser anti-reflection device according to claim 8, characterized in that: A pull rope (305) is wound around the winding disk (302), and one end of the pull rope (305) passes through the launch head (1) and the stabilizing ring (105) and is connected to the anti-reverse ring (2).

10. The laser anti-reflection device according to claim 9, characterized in that: A pair of fixed pulleys (306) are provided in the transmitting head (1), the pair of fixed pulleys (306) respectively correspond to the pair of pull ropes (305), and a bracket is connected between the fixed pulleys (306) and the inner wall of the transmitting head (1).

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