242 results about "Blue laser" patented technology

The invention discloses a 7-series aluminum alloy composite light source laser welding method, which is characterized in that stitch welding is carried out on double-layer 7-series aluminum alloy test pieces by using a composite light beam formed by a near-infrared laser beam and a blue laser beam, the thickness of the upper-layer 7-series aluminum alloy test piece is 1-2mm, and the thickness of the lower-layer 7-series aluminum alloy test piece is 2mm; before welding, removing an oxide layer on the surface of the aluminum alloy, then pressing up and down through a jig, and setting welding parameters and paths; during welding, light spots of a near-infrared laser beam and a blue laser beam are concentric and emitted at the same time, the two laser beams are coupled and focused to a swing welding head, and stitch welding is carried out according to set welding parameters and paths; the light spot diameter of the blue light laser beam is larger than that of the near-infrared laser beam. Near-infrared light and blue light form coaxial composite light spots and emit light at the same time, stitch welding is conducted on the double-layer aluminum alloy test piece in combination with the swing welding head, and the stitch welding device has the advantages of being high in welding efficiency, good in air hole state and few in splashing and cracks.

The invention relates to a laser welding method suitable for a manganese-copper diverter, which comprises the following steps of: respectively splicing and tightly attaching two non-ferrous metal strips to two sides of a middle metal strip, and after the to-be-welded surfaces of the non-ferrous metal strips and the middle metal strip are positioned on the same horizontal plane, welding the to-be-welded surfaces of the non-ferrous metal strips and the middle metal strip; a near-infrared laser beam and a blue laser beam which are coaxial form a red-blue composite laser beam, the red-blue composite laser beam is used for conducting laser welding along the splicing gap of the non-ferrous metal strip and the middle metal strip, and during laser welding, the inclination angle between the red-blue composite laser beam and the vertical face of the surface to be welded is larger than or equal to 7 degrees. A light spot formed by the near-infrared laser beam swings in a light spot formed by the blue light laser beam, a welding seam is formed at the splicing position of the non-ferrous metal strip and the middle metal strip and penetrates through the non-ferrous metal strip to form a bonding layer, laser welding can be adopted only, the welding seam quality of laser welding is improved, welding spatter is reduced, and material overheating is avoided; and the consistency of product quality and the high efficiency of production are both considered, the production cost is reduced, and batch production is achieved.

The invention discloses an intelligent cutting control method and system for blue laser, and the method comprises the steps: carrying out the time domain analysis of the power time sequence data of a blue laser in real time, and obtaining the power fluctuation data; matching the power fluctuation data with a preset defect feature model of the blue laser to determine the defect occurrence probability of the blue laser; under the condition that the defect occurrence probability is determined to be greater than a preset probability threshold value, according to the cutting parameters and the material parameters, determining an initial power compensation parameter and a kerf quality optimization parameter through a compensation parameter calculation model; performing multi-target iterative optimization on the initial power compensation parameter, the kerf quality optimization parameter and the power fluctuation data through a self-adaptive deviation adjustment algorithm to generate a dynamic power control signal; and adjusting the output power and the beam focusing position of the blue laser according to the dynamic power control signal so as to correct the cutting path of the blue laser in real time.

The invention provides fluorescent conversion type red fluorescent powder for display as well as a preparation method and application thereof, and belongs to the technical field of light-emitting display materials. Metal Sr, metal Al and metal Eu are mixed and smelted according to the stoichiometric ratio and then ground to prepare alloy powder, lithium aluminum hydride powder and the alloy powder are ground, mixed, calcined and ground again, and the red fluorescent powder for laser display with high brightness under blue light excitation is prepared. According to the invention, an alloying method is combined with a nitriding method, and the molar ratio (greater than 70%) of Eu < 2 + > (radiative transition) in all Eu elements in the prepared fluorescent powder product is greatly increased, so that the prepared red fluorescent powder has high color purity, high luminous efficiency and thermal stability, and meanwhile, a sample has an ultrahigh saturation threshold value under the excitation of blue laser; the material can be applied to a fluorescence conversion type laser display technology, and has huge potential for laser display devices.

The invention provides an autonomous three-dimensional tissue ablation control system based on a soft-bodied robot, and relates to the field of soft-bodied robots. In order to realize precise ablation of lesion tissues of a laser ablation system in a narrow in-vivo environment, a laser tissue interaction model is pre-constructed to describe an interaction relationship between blue laser and tissues, so that a robust ablation depth control method is developed; in addition, a self-adaptive laser ablation path tracking method combining a soft robot main body and an OCT imaging system is innovatively provided; finally, a surgical robot system with autonomous and precise three-dimensional laser ablation capability is constructed, and the precision, safety and automation level of a laser ablation operation can be remarkably improved.

The embodiment of the present application provides an aluminum-copper dissimilar metal composite laser welding method and an aluminum-copper welding joint, which relates to the field of laser welding technology. The aluminum-copper dissimilar metal composite laser welding method of the embodiment of the present application includes the following steps: S1, stacking and relatively fixing aluminum metal plates and copper metal plates to obtain parts to be welded; S2, combining blue laser, point infrared laser and ring infrared laser, and focusing them to the welding position on the surface of the parts to be welded to form a composite laser beam; S3, welding the parts to be welded in an oscillating manner by keeping the composite laser beam. The aluminum-copper dissimilar metal composite laser welding method and the aluminum-copper welding joint of the embodiment of the present application can reduce the porosity in the weld and improve the mechanical properties and ductility of the weld.

The invention provides an economical large-breadth blue light laser weeding device with a compact structure. The device comprises a 450nm semiconductor laser (1), a collimation focusing lens module (2), an X-Y scanning galvanometer (3), a pseudo coaxial structural member (6), a dichroscope (7) and a CCD camera (8), the 450nm semiconductor laser, the collimating and focusing lens module and the X-Y scanning galvanometer are sequentially fixed together through connecting pieces, zero deflection and maximum deflection of a laser beam correspond to a central and angular beam (4) during operation, and an area which can be scanned by the blue laser beam is an irradiation surface (5); the dichroscope is mounted right below the X-Y scanning galvanometer at an angle of 45 degrees through the pseudo coaxial structural member; the CCD camera is installed below the 450nm semiconductor laser through a pseudo-coaxial structural member, and the CCD camera is matched with a lens to meet the requirement that the field of view is larger than the irradiation surface of the laser. The device has the advantages of being high in response speed and precision, large in weeding area, low in cost, small in size, convenient to integrate and the like.

The nitride semiconductor blue laser element comprises a substrate, a lower limiting layer, a lower waveguide layer, an active layer, an upper waveguide layer and an upper limiting layer which are sequentially arranged from bottom to top, and a topological photon electronic composite flat band layer is arranged between the lower limiting layer and the lower waveguide layer. The topological photon electron composite flat band layer has a refractive index coefficient distribution characteristic and a forbidden band width distribution characteristic. According to the invention, an electron energy band and a photon energy band form high-dimensional line degeneracy in a momentum space, the interaction intensity of free electrons and photons is enhanced, the phase mismatch of the free electrons and the photons is overcome, the radiation intensity of the free electrons is excited, the free electron coupling light quantum efficiency is improved, and full energy-momentum matched flat band resonance is realized. Laser far-field radiation is enhanced, and laser mode gain and optical power are improved.

The invention provides europium-doped silicate green fluorescent powder as well as a preparation method and application thereof, and belongs to the technical field of luminescent materials. The green fluorescent powder can generate narrow-spectrum green light with the peak value located at 532 nm under excitation of 450 nm blue light, the full width at half maximum is 46 nm, a white light LED device prepared based on the fluorescent powder has a 110% NTSC color gamut, and it is indicated that the green fluorescent powder has excellent application value in backlight display. The saturation threshold value of the fluorescent powder reaches 21.6 W / mm < 2 > under the excitation of 450nm blue laser, and the lumen at the moment reaches 1157.9 lm. The green fluorescent powder disclosed by the invention has the advantages of high luminous efficiency, narrow full width at half maximum, high light saturation threshold under blue laser excitation, high lumen efficiency and the like, and has application feasibility in the aspect of laser display.

The invention belongs to the technical field of medical robots and minimally invasive surgery, and provides a robot control system and method for blue laser vaporization surgery of prostatic hyperplasia. Mapping the nuclear magnetic image volume data to a deformation field under an ultrasonic acquisition coordinate system, and deforming the preoperative nuclear magnetic image to an intra-operative ultrasonic space by using the deformation field to complete image registration; fusing the registered image with a stereoscopic vision system; the spatial depth of the surface of the target tissue is obtained from the endoscopic image so as to supplement navigation information; according to the utility model, the prostate deformation and probe posture change adaptive capacity in an operation is improved, the real-time visual closed-loop regulation and control capacity is improved, and the characteristics of small light spots, shallow heat diffusion, excellent hemostasis and the like of blue laser are combined, so that the vaporization and hemostasis precision in a tiny blood vessel dense area is ensured, and the problems of large tissue trauma and the like are avoided.

The invention belongs to the technical field of laser cladding processing, and provides a method for preparing an ablation-resistant copper alloy through a blue laser cladding process and the ablation-resistant copper alloy. The method comprises the following steps that alloy powder is subjected to ball milling, and mixed powder is obtained; the alloy powder is CuCr powder, CuW powder, ODS-Cu powder, SiO2 / Cu powder or C / Cu powder; and the mixed powder is used for preparing a cladding layer on a copper base material by adopting a blue laser cladding process. According to the method, the characteristic that a copper material is high in blue laser absorptivity is utilized, the problems of heat input accumulation, air holes, inclusions and the like under the conditions of low absorptivity and high energy density are avoided, and laser process parameters are controlled to form a molten pool on the surface of a copper base material; and the coaxial powder feeding device gathers the powder material into the molten pool for melting and rapid cooling and solidification by utilizing protective gas to form a cladding layer with excellent performance, so that the surface of the copper base material is modified, and the performance of the copper base material is improved.

The invention provides a copper alloy dual-wavelength laser synergistic pulsed magnetic field additive manufacturing device and method, and belongs to the field of additive manufacturing. The base is arranged right above the base plate and horizontally moves relative to the base plate; the blanking mechanism is arranged on the base and conveys powder materials to the base plate; the first laser is arranged on the base and emits blue laser towards the substrate; the second laser is arranged on the base and emits red laser towards the substrate; the blue laser irradiates the raw material and enables the powder material to form a molten pool on the substrate. The red laser irradiates the molten pool, inputs a heat source and expands the molten pool. According to the method, the irradiation starting time of the red and blue laser is designed, the power and the light spot area of the red and blue laser are adjusted, the molten pool formed by copper or copper alloy additive manufacturing can be finely regulated and controlled, and therefore the problems that in the additive manufacturing process, copper or copper alloy is low in forming efficiency and poor in compactness are solved.

The invention discloses a gallium nitride-based third-generation semiconductor blue laser, which sequentially comprises a substrate, a lower limiting layer, a lower waveguide layer, an active layer, an upper waveguide layer and an upper limiting layer from bottom to top, and is characterized in that a multi-state exciton induction layer is arranged between the lower waveguide layer and the lower limiting layer; the multi-state exciton induction layer comprises a first multi-state exciton induction layer, a second multi-state exciton induction layer and a third multi-state exciton induction layer. According to the invention, the multi-state exciton induction layer inhibits the annihilation of triplet excitons, reduces the dissipation of the triplet excitons, enhances the transfer of triplet energy, improves the generation efficiency of the triplet excitons, improves the number of long-life triplets, and improves the performance of the device. The radiation lasing of triplet excitons to the active layer of the laser element and the luminescence of singlet-triplet mixed self-confinement excitons are induced, the defect density is reduced, the excitation threshold value of the laser element is reduced, the quantum efficiency in a quantum well is improved, and the aging life of the quantum well is prolonged.

The invention relates to the technical field of hybrid bonding, in particular to a laser-assisted hybrid bonding interconnection method, which comprises the following steps of: S1, processing the surface of a wafer to enable the to-be-bonded surface of the wafer to be flat; s2, cleaning a to-be-bonded surface of the wafer, and removing organic pollutants and an oxide layer; s3, aligning and fitting the surfaces to be bonded of the two wafers; s4, enabling the to-be-bonded surfaces to comprise dielectric layers and metal interconnection points, irradiating the dielectric layers with infrared laser, and carrying out the interconnection of the dielectric layers of the two to-be-bonded surfaces; and S5, the metal interconnection points are heated by blue laser, and the metal interconnection points of the two surfaces to be bonded are interconnected. In the hybrid bonding stage, the infrared laser and the blue laser are used for bonding the dielectric layer and the metal interconnection point respectively, partitioned irradiation and differentiated heating of the metal interconnection point and the dielectric layer are achieved, the problems of interface warping, microcracks and other thermal damage are effectively avoided, and the interconnection quality and the packaging reliability are improved.

The invention provides a high-power blue-light solid laser for urinary surgery, which comprises a pumping source, a pumping cavity, an annular water cooling structure, a titanium-doped sapphire slice crystal, an end mirror, a diamond crystal, a focusing system, a frequency doubling crystal, a coupling system and an optical fiber, the pumping cavity is used for reflecting 532nm pumping laser so as to focus the 532nm pumping laser on the titanium-doped sapphire slice crystal; the titanium-doped sapphire slice crystal generates 803nm laser based on 532nm pumping laser; the diamond crystal enables 803nm laser to form 900nm laser through Raman frequency shift; the focusing system is used for focusing the 900nm laser into the frequency doubling crystal so as to convert the 900nm laser into 450nm blue laser through nonlinear frequency conversion; the coupling system couples the 450nm blue laser into the optical fiber to form a stable high-power 450nm blue laser light source which can be applied to urinary surgery. The blue light laser is simple in structure, the problems that an existing blue light laser is low in output power and poor in light beam quality are solved, and operation safety and efficiency are improved.

The invention relates to the technical field of laser welding, in particular to a 6-series aluminum alloy welding method and device with a magnetic field cooperating with time-sharing double-beam scanning, and the method comprises the steps that in the welding process, a blue light laser beam is used for scanning along a to-be-welded path in a spiral path, and a micro molten pool array is formed; after the blue laser beam stops scanning, a near-infrared laser beam concentric with a light spot of the blue laser beam is emitted at a preset time interval, and welding is conducted along a linear path deviating from the center line of the micro-molten pool array by a preset deviation amount; and during emission of the near-infrared laser beam, a constant magnetic field perpendicular to the welding surface is applied to the welding surface. The welding stability and the joint consistency of the 6-series aluminum alloy are improved, and the welding effect is effectively improved.

The invention relates to the technical field of flue-cured tobacco planting, in particular to a laser irradiation method for flue-cured tobacco seedling culture. The method comprises the following steps: performing laser irradiation treatment in a stage from flue-cured tobacco sowing to seedling hardening; the illumination intensity of the laser is 0.2-0.4 mu mol.m <-2 >. S <-1 >, the light intensity ratio of the red laser to the blue laser is 1.5: 1, and the single-day irradiation duration of the laser is less than or equal to 16 hours. The laser irradiation treatment is carried out in the flue-cured tobacco floating seedling raising stage, the flue-cured tobacco light energy utilization rate is increased, dry matter accumulation is promoted, the tobacco seedling quality is improved, the transplanted flue-cured tobacco is promoted to grow robustly, and finally the yield and the first-class tobacco rate of the flue-cured tobacco are increased.

The invention provides a light generating system (1000) comprising (i) a plurality of light sources (110,120, . . .), (ii) a first luminescent material (210), and (iii) a second luminescent material (220), wherein: (a) a first light source (110) is configured to generate first light source light (111) having one or more wavelengths in the blue wavelength range and having a first centroid wavelength (λC1), wherein the first light source (110) is a laser; (b) the first luminescent material (210) is configured to convert at least part of the first light source light (111) into first luminescent material light (211) having one or more wavelengths in the green and / or yellow wavelength range; (c) a second light source (120) is configured to generate second light source light (121) having one or more wavelengths in the yellow and / or orange wavelength range and having a second centroid wavelength (λC2), wherein λC2>λC1; wherein the second light source (120) is a superluminescent diode; (d) the second luminescent material (220) is configured to convert at least part of the second light source light (121) into second luminescent material light (221) having one or more wavelengths in the orange and / or red wavelength range; and (e) in an operational mode the light generating system (1000) is configured to generate system light (1001) comprising the first luminescent material light (211) and the second luminescent material light (221).

The utility model discloses a cutter wear detector which is characterized in that the cutter wear detector comprises a shell, and the shell is provided with a blue laser emitting port and a blue laser receiving port; a blue laser transmitter, a blue laser receiver, a detector control unit and a built-in battery are arranged in the shell, and a blue laser diode is arranged in the blue laser transmitter; and the detector control unit is connected with the blue laser transmitter and the blue laser receiver. The beneficial effects of the utility model lie in that the detection dimension precision and the detection speed are improved, the time cost is reduced, and the product quality is improved; the tool wear detection efficiency is improved, meanwhile, the labor cost is reduced, and product scrapping and collision caused by manual tool setting errors are avoided.

The embodiment of the invention provides an aluminum-copper dissimilar metal composite laser welding method and an aluminum-copper welding head, and relates to the technical field of laser welding. The aluminum-copper dissimilar metal composite laser welding method comprises the following steps that S1, an aluminum metal plate and a copper metal plate are arranged in a stacked mode and relatively fixed, and a to-be-welded part is obtained; s2, blue laser, point infrared laser and ring infrared laser are combined and focused to a welding site on the surface of the to-be-welded part, and a composite laser beam is formed; and S3, the composite laser beam is kept in an oscillating swing mode to weld the to-be-welded part. According to the aluminum-copper dissimilar metal composite laser welding method and the aluminum-copper welding head, the porosity in a welding seam can be reduced, and the mechanical property and ductility of the welding seam are improved.

The invention provides red nitride fluorescent powder as well as a preparation method and application thereof, and belongs to the technical field of rare earth luminescent materials. The chemical composition of the red nitride fluorescent powder is Sr2 [Mg < 1-x > Li < x > Al < 5-x > Si < x > N < 7 >]: yEu < 2 + >, x is greater than or equal to 0.001 and less than or equal to 0.50, and y is greater than or equal to 0.0005 and less than or equal to 0.20. The fluorescent powder is a nitride system, has strong light absorption when blue light is 400-500nm, has an excitation peak value of about 460nm, can be effectively excited by blue laser, can emit red fluorescence when being excited by blue light, has an emission peak value adjustable in a range of 635-685nm and a half-peak width adjustable in a range of 75-90nm, and has a good contribution to a high color gamut in a display device. When the fluorescent powder is used in various laser display devices taking blue light high-power laser as an excitation source, the fluorescent powder has the advantages of high luminance, high luminous efficiency and stable physical and chemical properties.

The invention relates to a multifunctional and multi-sensing intelligent automobile lamp and a using method thereof. The multifunctional and multi-sensing intelligent automobile lamp comprises an automobile lighting module, a wide-angle camera module, a long-focus / zoom camera module, a thermal infrared camera module, a laser radar module, an ultrasonic / millimeter wave radar module, a red, blue and green laser projection module and the like. After complex environment information sensed and acquired by wide-angle and long-focus / zoom binocular vision, thermal infrared binocular vision, laser radar, ultrasonic / millimeter wave radar and the like is fused and reconstructed, reliable data support is provided for an automobile intelligent / auxiliary driving system. And the red, green and blue laser projection module is utilized to project intelligent driving information such as vehicle states, navigation maps, safety early warning and danger warning to visible road surfaces of traffic participants in different colors according to importance degrees, so that driving fatigue is relieved, and driving safety and driving experience are improved.

A visible light laser system and operation for welding materials together. A blue laser system that forms essentially perfect welds for copper based materials. A blue laser system and operation for welding conductive elements, and in particular thin conductive elements, together for use in energy storage devices, such as battery packs.

The invention discloses a self-adaptive control method for a fire-fighting emergency lamp, and relates to the technical field of illumination control, and the method comprises the steps: arranging a fire-fighting emergency lamp group with ceramic fluorescent powder, generating visible light with a predetermined color through blue laser excitation, and achieving nS-level fiber breaking control through the chromatographic reflection of the visible light, carrying out attenuation prediction and identification on the light conversion efficiency of the lamp in combination with a generative adversarial network; a building three-dimensional model is generated through simulation, a lamp identifier is mapped into the model, fixed-point optimization control analysis of the lamp is executed, laser parameters are dynamically adjusted, and self-adaptive regulation and control of emergency lighting of a target building are achieved. The technical problems that an existing fire-fighting emergency lighting system has electrical fire hazards and is insufficient in anti-interference capability and emergency response capability are solved, and the technical effects that the intrinsic safety, the anti-interference capability and the emergency response capability of the emergency lighting system are improved through dynamic optimization of the photoelectric separation technology and the generative adversarial network are achieved.

The invention provides an illumination system and projection equipment. The lighting system comprises a light source module, a wavelength conversion device, a first light guide assembly, a second light guide assembly and a micro-lens array module. The light source module is used for providing a plurality of green and blue laser beams. The wavelength conversion device is used for generating fluorescent light beams. The first light guiding assembly and the second light guiding assembly are used for guiding a fluorescent light beam and a green laser light beam respectively. The fluorescent light beams form fluorescent light spots on the first area of the first side face of the micro-lens array module. The plurality of green laser beams form a plurality of green light spots on a second area of the first side surface of the micro-lens array module. The first region is adjacent to the second region. The illumination system and the projection equipment provided by the invention avoid energy loss and have good light uniformity.

The utility model relates to a laser beam combining device and a projector, the laser beam combining device comprises a first laser assembly, a second laser assembly and a beam combining structure, and the first laser assembly comprises a first green laser and a first blue laser; the second laser assembly comprises a second green laser and a second blue laser; the beam combining structure is used for combining light output by the first laser assembly and light output by the second laser assembly, the beam combining structure comprises a partition diaphragm, the partition diaphragm comprises a first area and a second area which are connected, and blue light output by the first blue light laser device and green light output by the second green light laser device are combined through the first area and then output through the second area; and green light output by the first green light laser and blue light output by the second blue light laser are combined through the second area. According to the invention, by arranging the partition diaphragm, the blue light and the green light of the first laser assembly and the second laser assembly are combined on the same partition diaphragm, so that the optical expansion amount of the combined light is greatly reduced.

The present invention relates to the technical field of semiconductor lasers, and particularly relates to a GaN-based blue laser and a preparation method thereof, including a substrate, on which an N-type GaN layer, an N-type lower confinement layer, an N-type lower waveguide layer, an active region, an upper waveguide layer, a P-type electron blocking layer, a P-type upper confinement layer, and a P-type contact layer are sequentially stacked; the P-type upper confinement layer is composed of at least one U-shaped GaN sub-layer and multiple layers of P-type In x Al y Ga 1‑x‑y N sub-layers stacked and compounded, where 0 ≤ x < y < 1, 0 < x < 1, 0 < x + y < 1. The present invention uses at least one U-shaped GaN sub-layer and multiple layers of P-type In x Al y Ga 1‑x‑y N sub-layers stacked and compounded to form the P-type upper confinement layer, which not only improves the crystal quality of the material, enhances the radiative recombination in the active region of the LD device, thereby improving the output optical power and photoelectric conversion efficiency of the LD, but also reduces the voltage and thermal loss of the LD device, and improves the aging life and other performance of the LD device.

An all-epitaxial, electrically injected surface-emitting green laser operates in a range of about 520-560 nanometers (nm). At 523 nm, for example, the device exhibits a threshold current density of approximately 0.4 kilo-amperes per square centimeter (kA / cm2), which is over one order of magnitude lower than that of previously reported blue laser diodes.

The invention discloses a laser light source-based baffle-free integrated automobile headlamp optical system, which comprises a low-beam laser light source, a high-beam laser light source, a low-beam focusing reflector, a high-beam reflection cup and a high-beam and low-beam light distribution lens, the high-beam and low-beam laser light source comprises a blue laser diode, a laser collimating lens, a laser focusing reflector and a curved reflector embedded with yellow fluorescent powder, and the low-beam focusing reflector and the high-beam reflection cup are used for reflecting light to the lower half portion and the upper half portion of the high-beam and low-beam light distribution lens respectively. The high-beam and low-beam light distribution lens is a double-free-form-surface lens of a segmented structure, the upper half portion of the lens is a two-section symmetrical fan-shaped lens and used for high-beam illumination, and the lower half portion of the lens is a four-section fan-shaped lens and used for low-beam illumination. According to the baffle-free dual-light integrated structural design, the weight of the headlamp can be effectively reduced, the size is reduced, and the system stability is improved.

The invention provides a titanium steel dissimilar metal welding device and method based on infrared laser and blue laser and application, and belongs to the technical field of hybrid welding, the device comprises a laser system installed on a six-axis mechanical arm, and the laser system comprises a beam splitting module, a blue laser collimation module and an infrared laser collimation module; the beam splitting module is connected with the CCD visual sensing module, the CCD visual sensing module is connected with the video monitor and the light path reflection device, the video monitor is connected with the terminal controller, the infrared laser alignment module is connected with the infrared laser, the blue laser alignment module is connected with the blue laser, and the blue laser alignment module is connected with the light path reflection device. The blue laser and the infrared laser are respectively connected with the water cooling device through pipelines, and the water cooling device is connected with the composite laser controller. The method is high in process flexibility, adapts to different thicknesses and joint types by adjusting the laser power and the wire feeding speed, overcomes the problems that a molten pool is unstable and interface bonding is poor in dissimilar metal welding, and provides a reliable scheme for complex structure welding.