132 results about "Laser channel" patented technology

The utility model relates to the technical field of welding, in particular to a dust collecting device. The dust collection device comprises a mounting body and an anti-backflow piece, a laser channel and a dust collection channel which are intersected are formed in the mounting body, the dust collection channel is provided with an air outlet, and the anti-backflow piece is arranged in the dust collection channel and located between the air outlet and the laser channel. The anti-backflow piece can prevent pollutants in the dust collection channel from flowing in the direction from the air outlet to the laser channel, can prevent the pollutants from flowing back, prevents the pollutants from damaging the interior of the laser lens, prevents the laser lens and laser welding equipment from being damaged, guarantees normal proceeding of the laser welding process, and improves the welding quality. And the maintenance cost and the maintenance frequency of the laser lens are reduced.

The invention provides a blowing head and laser welding equipment, the blowing head comprises a body, the body is provided with a laser channel in a penetrating mode, the laser channel is provided with a light inlet end and a light outlet end, and a laser beam is transmitted to the light outlet end from the light inlet end; the protective glass is positioned on one side of the light inlet end; a blowing channel used for conveying protective gas into the laser channel is arranged on the side wall of the body in a penetrating mode. The end face, close to the light outlet end, of the body is provided with a spherical reflecting face which is concavely arranged towards the light inlet end, the spherical reflecting face and a space defined by a welded workpiece form a heat storage space, and the laser channel is communicated into the heat storage space. According to the method, the influence of protective gas on cooling of a welding spot area can be reduced, the laser absorption rate of a welded part is increased, and the welding depth and quality are guaranteed.

The present invention discloses a laser head air path structure for improving cutting quality, comprising: a laser, a laser channel, a focusing mechanism, an air supply unit and a nozzle device; wherein, the laser channel is vertically arranged in the middle of the laser, the focusing mechanism is horizontally installed in the laser channel inside the laser, the nozzle device is vertically installed below the laser, and an independent first air channel and a second air channel are provided in the nozzle device, and the first air channel and the second air channel respectively spray protective gas to the laser cutting point from corresponding blowing points at the same time; an air supply unit is installed between the laser and the nozzle device, and the air supply unit is used to supply protective gas to the first air channel and the second air channel in the nozzle device; the spray direction of the first air channel is directly facing the cutting focus position of the laser; the spray direction of the second air channel is the peripheral position of the cutting focus circle of the laser.

The invention discloses an automatic driving laser radar simulation method for high-fidelity material modeling, and the method comprises the steps: carrying out the high-fidelity modeling of a complete physical process of a single laser channel, and designing a complete technical chain from laser beam modeling, material reflectivity modeling, light path modeling to post-processing. In laser beam modeling, energy space distribution is accurately depicted by introducing an angle attenuation conical beam model; in material reflectivity modeling, a bidirectional reflection distribution function system covering Lambert body, specular reflection, transmission, retroreflection and general materials is established; in light path modeling, traditional single reflection hypothesis is broken through, time-resolved Monte Carlo path tracking and kernel density estimation are adopted, simulation of multi-path reflection and transmission effects is achieved, traditional model bottlenecks are broken through, complex optical phenomena are simulated, the generation mode has expandability and controllability, rare key scenes are efficiently synthesized, and the method is suitable for large-scale popularization and application. And the method has wide field extension potential and high technical universality.

The invention provides an automatic mechanical arm device, and belongs to the technical field of mechanical arms, the automatic mechanical arm device comprises a multi-axis servo mechanical arm and a laser welding head, the laser welding head is connected with a gas generator, the laser welding head is connected with an air injection seat and a laser channel cylinder, the air injection seat is connected with an air cylinder, and the automatic mechanical arm device further comprises a pollution discharge assembly, the pollution discharge assembly is used for removing smoke dust attachments after welding in the air outlet cylinder; the throttling assembly is used for circularly absorbing part of gas; the device has the beneficial effects that active cleaning of smoke dust attachments on the inner wall of the air outlet cylinder is achieved through the pollution discharge assembly, external washing equipment is not needed, a traditional maintenance means is avoided, the stability of the drift diameter of an air path is maintained, it is ensured that protective gas is output uniformly, the welding accuracy and efficiency are improved, and the throttling assembly restrains diffusion of the protective gas through an umbrella-shaped throttling cover; and meanwhile, unpolluted redundant protective gas is recycled, and the consumption of the protective gas is reduced.

The invention discloses laser cutting equipment for metal processing, and relates to the technical field of laser cutting, the laser cutting equipment comprises a rack main body, a sliding table is arranged on the rack main body, a cutting head is arranged in the sliding table, a laser channel assembly is arranged in a cutting head chamber, a shield is arranged at the bottom end of the cutting head, and the bottom end of the cutting head is sunken upwards to form a mounting groove; the adjusting assembly is arranged in the cutting head, gas leakage is reduced as much as possible, the gas spraying range can be controlled, the good slag removal effect is achieved, the linkage effect drives the auxiliary mechanism to adjust the diameter of a movable ring in a nozzle gas channel, the gas spraying range can be controlled, the gas spraying range can be controlled, the slag removal effect is good, and the service life of the cutting head is prolonged. And the gas can be accelerated when passing through the movable ring, so that the efficiency of the cutting head is improved.

The utility model relates to the technical field of laser welding, in particular to a welding head module and a laser welding device. The welding head module comprises a welding head fixing seat, a welding nozzle assembly, a wire clamp assembly and a cutter assembly, and the welding head fixing seat is used for being connected with a driving assembly of the laser welding device; the welding nozzle assembly is arranged on the welding head fixing base and comprises a welding nozzle, and a laser channel is formed in the welding nozzle and used for allowing a laser beam to penetrate through so that a metal wire located on the light emitting side of the welding nozzle can be welded and fixed to a to-be-welded part; the wire clamp assembly is arranged on the welding head fixing base and comprises a wire guide nozzle and a wire clamp, the wire guide nozzle is arranged on one side of the welding nozzle and used for guiding a metal wire to the light emitting side of the welding nozzle, and the wire clamp can move relative to the wire guide nozzle so as to be matched with the wire guide nozzle to clamp the metal wire; the cutter assembly is fixedly connected with the welding head fixing base and comprises a cutter, the cutter is arranged on the side, away from the wire guide nozzle, of the welding nozzle, and the cutter can move towards the light emitting side of the welding nozzle so as to cut off the metal wire.

This invention discloses a laser-air coaxial filament feeding and spraying additive manufacturing apparatus and method. The apparatus includes a nozzle with a collecting cavity and a filament feeding channel, a laser channel, and an air jet structure connected to the collecting cavity; an air inlet structure surrounding the air jet structure and connected to the filament feeding channel via a pipe; a filament protection tube installed in the filament feeding channel, the interior of which is used to transport filament, and the gap between the filament protection tube and the filament feeding channel is used to transport gas; and a laser generator emitting laser light into the laser channel. The output direction of the filament is the same as the airflow direction, thus only the laser focusing position needs to be adjusted. By placing the air inlet structure outside the air jet structure, when air jetting is required, the gas can first exchange heat with the air jet structure to cool it down, and then flow into the collecting cavity to spray out the molten filament. Compared to traditional structures, this method does not involve complex improvements but effectively cools the air jet structure.

The invention discloses a microminiature laser induced deviation servo rotary table which comprises a supporting frame, an orientation transmission mechanism and a pitching transmission mechanism are arranged on the supporting frame, and the orientation transmission mechanism comprises a driving wheel transmission mechanism, a driven wheel transmission mechanism and an idle gear transmission mechanism. The driving wheel transmission mechanism and the driven wheel transmission mechanism form a gear meshing chain through the idle gear transmission mechanism; the pitching transmission mechanism comprises a first pitching transmission mechanism and a second pitching transmission mechanism, the first pitching transmission mechanism is arranged at the top of the driving wheel transmission mechanism, the first pitching transmission mechanism comprises a photoelectric detection mechanism, and the photoelectric detection mechanism is driven by a first gear pair; the second pitching mechanism comprises a reflecting mirror, the reflecting mirror is driven by a second gear pair, coaxial laser channels are formed in the driven wheel transmission mechanism and the supporting frame, the reflecting mirror is arranged above an opening of the laser channels, and meanwhile the device has the advantages of being small in size and light in weight and can meet the design requirement of a light-weight combat system.

The present invention relates to the field of welding technology, and in particular to a coaxial gas protection device for welding, comprising a coaxial connecting seat, a coaxial protection seat, a laser channel, a protection nozzle, and a gas uniformity component. By forming a relatively closed protective gas accommodating chamber inside the coaxial connecting seat and the coaxial protection seat, the protective gas can be stabilized and gas disorder can be prevented; by arranging a gas uniformity component in the accommodating chamber, the gas can be uniformized, and the effect of uniform gas distribution can be improved. The protective gas passes through gas channels with successively decreasing diameters, accelerating the ejected gas, forming a stable protection area and reducing the gas input flow rate. By arranging a curved groove at the bottom end of the coaxial protection seat and internally connecting a plurality of uniformly distributed gas channels, a stable spatial three-dimensional protective gas atmosphere can be formed above the weld during the welding process, resulting in a better protection effect. At the same time, it can also prevent the influence of other airflows and stabilize the welding protection effect.

The utility model relates to the technical field of particle counting sensors, in particular to a light supplementing structure of a particle counting sensor, which comprises a sensor body and a laser transmitter, a photosensitive cavity is arranged in the sensor body, a laser channel is arranged on one side of the photosensitive cavity, and an extinction channel is arranged on the other side of the photosensitive cavity. The laser channel and the extinction channel are coaxially arranged; the delustring device further comprises a plug, and one end of the plug is detachably arranged in the delustring channel. A counter bore is formed in one end, facing the laser channel, of the plug, and the bottom of the counter bore is used for reflecting a laser beam emitted by the laser emitter back to the photosensitive cavity; according to the utility model, the hole bottom of the counter bore is used for reflecting the laser beam emitted by the laser emitter back to the photosensitive cavity, so that the sampling air flow can be subjected to bidirectional irradiation, light supplement is realized, and when the number of particles in the sampling air flow is large, the light scattering effect can be enhanced in a bidirectional irradiation manner, and the measurement precision is improved.

The invention discloses an intelligent laser cladding welding device capable of dynamically adjusting the powder feeding rate, which comprises a laser collimator, a welding main body is mounted on the lower end surface of the laser collimator, and a laser channel pipe is coaxially arranged in the welding main body; an annular powder cavity is formed between the laser channel pipe and the welding body, one side of the welding body is connected with a powder feeding pipe, the powder feeding pipe is communicated with the annular powder cavity, and the powder feeding pipe is externally connected with a powder feeder. A welding head is arranged below the welding main body; a powder discharging mechanism is arranged on the outer side wall of the welding body and communicates with the annular powder cavity.

This application relates to a multilayer capacitor welding apparatus and its manufacturing process, comprising a conveying mechanism and a welding stand. A laser welding head is mounted on the top of the welding stand, a turntable and a driving component are rotatably mounted in the middle, and a laser channel is radially penetrated on the outer peripheral wall of the turntable's arc surface. Several piercing seats are fixedly connected to the outer peripheral wall of the turntable's arc surface, and multiple piercing needles are fixedly connected to the piercing seats. The driving component and the laser welding head are jointly connected to a welding controller. The welding controller is configured such that when the conveying mechanism intermittently conveys one of the patches on the lead frame to below the turntable, it controls the driving component to rotate the turntable and, with the help of multiple piercing needles, pierce the single-layer patch and rotate to pry up the protrusions composed of partial metal pads and aluminum foil, until the turntable rotates to the point where the laser channel on it aligns with the laser welding head. Then, it controls the laser welding head to weld the multiple protrusions on the patch. This application can improve the bonding strength between aluminum foil and metal pads, as well as between upper and lower patch components.

The invention relates to an infusion monitoring device for neurological serious illness, which comprises an infusion support mechanism, a laser monitoring mechanism, a gravity detection mechanism, a switching positioning mechanism and an infusion tube limiting mechanism, and is characterized in that the laser monitoring mechanism forms a detection channel through a laser generator and a laser receiver; the gravity detection mechanism comprises a rotatable rotating disc, a tilting rod, a hook, a connecting rod, a balancing weight and a first spring, the balancing weight moves upwards or downwards under the action of the weight change of the infusion bottle to shield the laser channel to achieve monitoring reminding of infusion ending, and the switching positioning mechanism is used for adjusting the angle of the rotating disc to achieve monitoring channels corresponding to infusion bottles with different capacities. The infusion support structure has a height adjusting function, the infusion tube limiting mechanism achieves limiting and heat preservation of an infusion tube through a heating and clamping structure, and the device has the functions of being accurate in monitoring, convenient to switch, wide in application range, capable of heating in winter and the like.

The invention provides an on-chip integrated microwave photon-assisted channelized frequency measurement system, which is applied to the technical field of microwave photons. The system comprises a light source module used for emitting optical carriers with different wavelengths through N laser channels; the beam combining module is used for combining the N optical carriers with different wavelengths through N first channels to obtain a multi-wavelength optical carrier signal; the modulation module is used for receiving a radio frequency input signal and loading the radio frequency input signal to the multi-wavelength optical carrier signal to obtain a multi-wavelength radio frequency modulation optical signal; the filtering module is used for filtering the multi-wavelength radio frequency modulation optical signal so as to extract a single sideband of the radio frequency modulation optical carrier signal of each wavelength; the beam splitting module is used for separating the filtered multi-wavelength radio frequency modulation optical signals and distributing the multi-wavelength radio frequency modulation optical signals to N second channels; and the detection module is used for detecting the power of the output signals of the N second channels so as to determine the frequency range of the radio frequency input signal.

An engraving apparatus includes: a base provided with a carrying position configured to carry a battery to be engraved, a moving mechanism movably disposed on the base, and an engraving assembly disposed on the moving mechanism and configured to perform an engraving operation on the battery. The engraving assembly includes a laser device and a dust extraction hood. A laser channel is formed inside the dust extraction hood. When the engraving assembly performs an engraving operation, the battery is in communication with the laser device via the laser channel. The dust extraction hood is formed with a dust extraction port in communication with the laser channel. The moving mechanism is configured to be capable of driving the engraving assembly to move in a first direction, a second direction, and a third direction, and the first direction, the second direction, and the third direction are arranged to intersect one another.

The utility model discloses a welding assembly and welding equipment, and relates to the technical field of welding, the welding assembly comprises a main body part and a crimping part, the main body part is an insulating part or the surface layer of the main body part is an insulating layer, the main body part comprises a first air channel and a second air channel, the first gas channel and the second gas channel are used for gas to flow in or flow out, and the main body piece comprises a first laser channel; the crimping part is of an integrated structure, the crimping part is an insulating part, and the crimping part comprises a second laser channel; the crimping part and the main body part are of a split type structure, the crimping part is detachably connected with the main body part, the crimping part is connected to the main body part, and the first laser channel is communicated with the second laser channel. And due to the structural design of detachable connection, the replacement and maintenance time is effectively shortened, the production efficiency is improved, the maintenance and replacement cost is reduced, and the universality of the main body piece is improved.

The invention relates to a chip for biomarker detection and a preparation method and application thereof. The chip comprises a conductive layer and an insulating polymer layer which are stacked in sequence, a plurality of micropores are formed in the insulating polymer layer, and each micropore penetrates through the insulating layer; or a semiconductor layer is also arranged between the conductive layer and the insulating polymer layer; the semiconductor layer comprises a semiconductor modified by a silane coupling agent and / or a titanate coupling agent. The microholes can capture various fixed types of fluorescent dyes at the same time, the chip for biomarker detection is used in immunoassay detection, various different markers can be detected, chemical, optical and electric reactions are carried out under the action of chemical reagents, light and electricity, multi-fluorescence imaging is carried out under multiple laser channels, and the biomarker detection accuracy is improved. The multi-channel biomarker detection based on electrochemical single-molecule immunoassay detection is realized, and the method has the advantages of low cost, high sensitivity, simple detection steps and rapid detection.

The utility model discloses a laser processing device with a splash blocking structure. The laser processing device comprises a pipe body and the blocking structure connected with the inner wall of the pipe body. The first blocking part obliquely extends from the inner wall of the tube body to the laser outlet, and the second blocking part obliquely extends from one end, far away from the inner wall of the tube body, of the first blocking part to the inner wall of the tube body; in the direction from the laser inlet to the laser outlet, the inner diameter of the first blocking part is gradually reduced, and the inner diameter of the second blocking part is gradually reduced; the blocking structure is provided with a through hole for a laser beam to pass through, and the through hole is completely matched with the contour of the laser beam. In the laser machining process, due to the fact that the first blocking part inclines downwards, waste residues accumulated on the surface of the first blocking part can fall off the laser channel in time along the inclined surface; and the inclined surface of the second blocking part becomes a reflecting surface, so that upward splashing waste residues are reflected at a downward speed to be separated from the laser channel, the waste residues remained in the laser channel are reduced, and the mirror surface is prevented from being damaged or stained by the waste residues.

The invention discloses a laser cladding processing system, belongs to the technical field of laser cladding processing, and solves the technical problem of poor stability of existing laser cladding processing equipment. The device comprises a cladding head, an optical fiber laser, a water cooling machine and a control module, a shell is arranged at the top of the cladding head, a laser channel, a first-stage protection lens, a first-stage collimation lens, a second-stage focusing lens and a second-stage protection lens are arranged in the shell, the axis of the laser channel, the axis of the first-stage protection lens, the axis of the first-stage collimation lens, the axis of the second-stage focusing lens, the axis of the second-stage protection lens and the axis of the cladding head coincide, and the periphery of the first-stage collimation lens and the periphery of the second-stage focusing lens coincide with the axis of the cladding head. In the laser cladding machining process, the control module obtains the temperature of each cooling water channel and controls the cooling water flow of each cooling water channel, so that the first-stage collimating lens, the second-stage focusing lens and the cladding head all work at the optimal working temperature, and therefore the stability of laser cladding machining operation is guaranteed; and the laser cladding processing quality is ensured.

A medical water jet scalpel system is provided with an insertion part and a handle part connected to the near end of the insertion part, and the medical water jet scalpel system comprises a water jet scalpel assembly, a laser assembly and a suction control assembly. The water jet assembly comprises a water jet channel penetrating through the insertion part and the handle part and is configured to output jet flow; the laser assembly comprises a laser channel penetrating through the insertion part and the handle part and is configured to output laser energy; the aspiration control assembly includes an aspiration channel through the insertion portion and the handle portion configured to aspirate fluid. According to the medical water jet scalpel instrument, the water jet scalpel technology and the laser technology are combined, prostate tissue excision can be carried out under the condition of no thermal damage, and meanwhile hemostasis is achieved; in addition, the medical water jet scalpel instrument can complete the whole operation at the same time, surgical instruments do not need to be replaced midway, operation is easy, and the learning curve is short.

The invention relates to a device for laser welding of components (2, 3) with at least one laser beam emitter and at least one pressure piece (1), which - is designed to be pressed against at least one of the components (2, 3), and - has a laser channel (5) through which a laser beam (LS) emitted by means of the laser beam emitter can be guided onto a surface of at least one of the components (2, 3). According to the invention, in a wall (4) surrounding the laser channel (5) and forming its outer surface, at least one shielding gas channel (6.1 to 6.4) is formed in an inner section facing the laser channel (5), which can be supplied with a shielding gas (SG) and has at least one shielding gas outlet (SGA) that leads through the wall (4) into the laser channel (5). Furthermore, in the wall (4), at least one cooling channel (7) is formed in an outer section facing away from the laser channel (5), which can be supplied with a cooling medium (KM). The invention further relates to a method for laser welding of components (2, 3).

The present invention provides a device for examining the binocular vision and methods for analyzing vision binocularity utilizing the device. Generally the device has at least a laser channel configured to emit laser beams for ray tracing, a beam divider, right-eye and left-eye measurement channels, a processing unit and an electro-mechanical. The methods compare processed data from the right-eye and left-eye measuring channels to calculate correlation coefficients for near and far vision, to evaluate mirror asymmetry of wave front errors of the eyes, by considering potential involvement of anisocoria due to a planned surgery, and utilizing a neurological summing potential by a binocularity vision index.

The utility model relates to the technical field of laser blowing protection, in particular to a coaxial rotary blowing protection device, which comprises a blowing mechanism, a rotary driving mechanism and an extension mechanism, the blowing mechanism is connected to the upper part of the rotary driving mechanism; the extension mechanism is connected to the lower portion of the rotation driving mechanism and comprises an extension pipe, a drawer type spectacle frame and a protection lens, the extension pipe is provided with a laser channel, one side of the laser channel is provided with an air blowing channel, and the air blowing channel is communicated with the air blowing mechanism. The utility model aims to provide the coaxial rotary blowing protection device which is used for carrying out blowing protection during laser welding of a workpiece, so that laser welding forming is more uniform.

The utility model provides a laser scanning projection system which comprises a plurality of laser channels, each laser channel is used for independently emitting laser, at least one laser channel comprises a laser source and a collimating and shaping assembly, the laser source is used for emitting the laser, the collimating and shaping assembly is located on a light path of the laser, and the collimating and shaping assembly is located on the light path of the laser. The collimation module is used for collimating the slow axis direction and the fast axis direction of the laser and expanding the beam in the slow axis direction of the laser; the light combining module is positioned on a light path of the laser and is used for combining the laser emitted by the plurality of laser channels into light source light; the scanning module is located on a light path of the light source light and used for modulating and reflecting the angle of the light source light so as to emit image light, and the image light is used for displaying a projection image. The utility model further provides a vehicle.

A code engraving apparatus (100) and a battery processing device. The code engraving apparatus (100) comprises: a base (10) having a bearing position (11) for bearing a battery on which code engraving will be performed; a moving mechanism (20) movably provided on the base (10); and a code engraving assembly (30) provided on the moving mechanism (20) and used for performing a code engraving operation on the battery. The code engraving assembly (30) comprises a laser (31) and a dust suction hood (32), a laser channel (321) being formed inside the dust suction hood (32). When the code engraving assembly (30) executes a code engraving operation, the laser channel (321) is communicated between the battery and the laser (31). The dust suction hood (32) is provided with a dust suction port (322) in communication with the laser channel (321). The moving mechanism (20) is configured to be able to drive the code engraving assembly (30) to move along a first direction (a), a second direction (b) and a third direction (c). The first direction (a), the second direction (b) and the third direction (c) intersect with one another. The moving mechanism (20) drives the code engraving assembly (30) to move in three different directions such that the code engraving assembly (30) is able to execute the code engraving operation on the battery with greater precision, thus increasing the accuracy and efficiency of the code engraving process.

The embodiment of the utility model discloses a nozzle for a laser processing head and the laser processing head, a first laser channel is arranged in the nozzle, the first laser channel comprises an inlet end and an outlet end, and a stable section, a convergent section and a divergent section which are sequentially communicated from the inlet end to the outlet end, the inner diameter of the stabilizing section is gradually reduced in the direction from the inlet end to the outlet end, the inner diameter of the converging section is gradually reduced in the direction from the inlet end to the outlet end, and the inner diameter of the diverging section is gradually increased in the direction from the inlet end to the outlet end; the air flow is accelerated in the convergence section, the pressure released by the air flow in the divergence section is converted into kinetic energy, and sufficient kinetic energy of the air flow ejected from the outlet end of the auxiliary air is ensured, so that reverse slag dirt splashed to the outlet end can be blown out, and the problem that a protective mirror in an existing laser processing head is easily polluted by the reverse slag dirt is solved.

The invention belongs to the technical field of handheld laser welding, and particularly relates to a handheld laser machining head. The handheld laser machining head comprises a body and an air supply assembly. The body is provided with a laser channel for conveying laser. The gas supply assembly is provided with a gas channel used for conveying gas, at least part of the gas supply assembly is integrally arranged in the body, and the gas channel and the laser channel are independently arranged. According to the scheme, the air channels are integrally arranged in the body, compact layout of the machining head is achieved, and the problem that in the prior art, due to scattered air pipes, the operation flexibility of the machining head is limited is solved; and meanwhile, the independent gas pipe can ensure the protection effect, the gas amount is saved, and the economic benefit is better.

The present invention discloses a laser sputtering atomic generation device, which includes a housing. A laser channel and an atomic emission channel are provided inside the housing. A laser reflection channel is arranged between the laser channel and the atomic emission channel. A target is provided at one end of the atomic emission channel, and an atomic emission hole is provided at the other end of the atomic emission channel. Along the propagation direction of the incident laser in the laser channel, an optical fiber coupler, a collimator and a reflector are sequentially provided. A fiber optic interface is provided on the housing at a position corresponding to the optical fiber coupler. The laser reflected by the reflector passes through the laser reflection channel and enters the atomic emission channel and can be projected onto the target. It solves the problems of long-distance collimation caused by the relative separation of the laser and the target and the excessive occupation of the laser incident positions around the ion trap.

The invention relates to the technical field of laser cladding, in particular to a small inner hole laser cladding device which is characterized in that a tubular main body comprises a light inlet connector, a collimation module, a medium input module, an extension rod module, a focusing module and an output module which are sequentially connected from back to front; a laser channel penetrating front and back is formed in the tubular body, and the axis of the laser channel upwards deviates from the axis of the tubular body. A collimating lens, a protective lens I, a focusing lens, a protective lens II and a plane mirror are sequentially arranged in the laser channel from back to front, the protective lens II is arranged at the front end of the focusing module, and the plane mirror is arranged at the top of the output module; a protective gas hood is arranged at the front end of the output module, the protective gas hood is of a front-back through cylindrical structure, the rear end of the protective gas hood is communicated with the laser channel, and the front end of the protective gas hood inclines downwards; and the laser beam is transmitted to the plane mirror through the laser channel and then can be emitted from the protective gas hood. The distance between the plane mirror and the molten pool is increased, and the damage probability of the plane mirror is reduced.