183 results about "Laser channel" patented technology

A laser nozzle for use in a laser powder fusion (LPF) welding process provides longer service life and ease of maintenance. Eliminating the use of laser nozzle inserts, the laser nozzle uses an inner tip that is less subject to damage from the welding process. The laser beam travels down an open central passage to exit out the inner tip in focused alignment with a conical powder flow stream ending in a point generally coincident with the laser beam. The powder supply travels through a passage that is generally coaxial to the central laser passage. A circumscribing passage for inert shielding gas or the like is coincidentally coaxial with both the laser powder flow channel and the central laser channel. Coolant is circulated through a main body portion of the nozzle in order to keep the entire assembly cool. Both the laser and the flow of powder may be adjusted according to operating preferences. A porous shielding cover prevents ejecta and other materials from entering into the shielding gas flow channel. The entire assembly is easily constructed from readily available materials and is easily disassembled for cleaning. Reassembly is also easily achieved in order to enable rapid refurbishment and reconstitution of an optimal LPF welding nozzle.

A laser cladding device for applying a coating to a part comprising a laser which can generate laser light, which is adapted to heat the coating and the part, a main body defining a laser light channel adapted to transmit the laser light to the part, a coating channel adapted to transmit the coating to the part, and a vacuum channel and a nozzle having an exit. The nozzle comprises a delivery port at one end of the laser light channel, a coating port at one end of the coating channel, and a vacuum port at one end of the vacuum channel, wherein the vacuum port is positioned generally adjacent the delivery port In operation the vacuum port draws a vacuum, pulling the coating towards the part.

The invention provides a method for non uniformity correction of range finding of an array push-scan type laser radar. An array push-scan type laser radar with N laser channels are used for detecting a target plate, the relative position of the array push-scan type laser radar and the target plate is changed, and the target plate is detected for M times, so laser radar data and total station data corresponding to each laser channel are obtained. By carrying out operation like coordinate transformation, a non uniformity correction model is established, and an actual range finding value of any one laser channel is used as a reference correction value to correct actual range finding values of other laser channels.

The invention relates to a device for calibrating a multi-spectral axis calibrator with a discrete optical axis and belongs to the field of optical measurement. A semi-transmitting and semi-reflecting mirror, a laser and a charge-coupled device (CCD) camera are integrated in a collimator tube; an optical axis of the CCD camera is vertical to that of the collimator tube, and an object point of theCCD camera is positioned at an equivalent focal point of the collimator tube; and an electric cross which is generated by the CCD camera is displayed by a display. During self-calibration, an emergent light beam of the collimator tube is vertically irradiated on a plane reflecting mirror and reflected and then forms a self-calibration image on the display; and during the calibration measurement of the axis calibrator, after an infrared channel or a visible light channel of the measured axis calibrator is aligned with the collimator tube, the laser emits laser to a laser channel of the measured axis calibrator, and the parallel misalignment of the laser and the infrared channel or the parallel misalignment of the laser and the visible light channel is obtained by a data processing system of the laser channel. The device is applicable to calibration of the multi-spectral axis calibrator with the discrete optical axis and has the characteristics of simple calibration method, objective calibration result, reliability and the like.

The invention discloses a trunked aircraft communication system. Each member aircraft is provided with a communication terminal which comprises a platform electronic system, a communication processing module, a control bus, an optical antenna and an omnidirectional antenna. The communication processing module has two channels which are respectively a wireless laser channel and a wireless microwave channel. As for the wireless laser channel, the optical antenna is used as a transmitting antenna. As for the wireless microwave channel, the omnidirectional antenna is used as a transmitting antenna. The wireless laser channel transmits high-speed payload data. The wireless microwave channel transmits low-speed remote control and telemetry data and platform data information. When the high-speed payload data is transmitted, position and attitude information interactions between two laser communication parts are carried out through the wireless microwave channel so as to determine the laser transmission direction and further control optical antenna pointing. And then, the high-speed payload data is transmitted through the wireless laser channel. Combining advantages of microwave communication and laser communication, heterogeneous network interconnections between member aircrafts are realized by cooperation between the two channels.

The present invention relates to a method and system for obtaining laser radar calibration parameters, a laser radar calibration method and a laser radar calibration system. According to the method and system for obtaining the laser radar calibration parameters, the laser radar calibration method and the laser radar calibration system, matching operation is performed on point cloud information corresponding to selected laser channels and point cloud information corresponding to the other laser channels one by one, so that the translation matrix and rotation matrix of the point cloud information corresponding to each of the other laser channels relative to the point cloud information of the selected laser channels can be obtained; the calibration parameters of each of the other laser channels relative to the selected laser channels can be obtained according to the translation matrix and rotation matrix; the calibration parameters can reflect the translation quantity and rotation quantity of the other selected laser channels relative to the selected laser channels in a multi-line laser radar; and the locations and angles of each of the other laser channels are calibrated relative to the selected laser channels according to the calibration parameters, so that the initial installation locations of a plurality of laser channels in the multi-line laser radar can be always consistent with each other, and thus, the sensing accuracy of the multi-line laser radar can be improved.

The invention discloses a portable three-channel near-deep-UV Raman spectrometer. The spectrometer comprises a near-deep-UV laser emitter, a laser spot shaping device, a first beam splitter, a zooming or non-zooming lens, a second beam splitter, a third beam splitter, a relay optical system, a point-to-line optical system, a spectrum forming system, an optical or mechanical sample scanning system and a data processing and wirelessly transmitting-receiving system. After Raman, fluorescent and visible / laser channels are fused in the point-to-point manner in real time, the whole sample is scanned, and data processing such as spectral separation, peak positioning, spectral library establishment and substance identification is carried out. The portable three-channel near-deep-UV Raman spectrometer has the advantages including that the flexibility and resolution are high, illumination points are large, the detection distance is long, rapid onsite non-contact measurement can be implement in the sun, and the spectrometer is relatively safe for the eyes.

The invention relates to a digital holographic technique, and aims to provide a pipeline powdered coal particle size measuring device and a measuring method. The method comprises the following steps: sampling a gas in a powdered coal conveying pipeline by a sampling nozzle, mixing clean air with the sampled gas to form a mixed gas, and taking the mixed gas as a sample to be delivered into a diluting chamber; combining a laser with a spatial filter to generate collimated laser, and projecting the collimated laser to a CCD camera by virtue of a laser channel of the diluting chamber; and processing a holographic image acquired by the CCD camera to obtain concentration and particle size distribution information of the measured sample, and then obtaining concentration and particle size distribution data of the powdered coal in the sampled gas according to a dilution ratio of the measured sample. By use of the device and the method provided by the invention, online quantitative measurement on the particle size and the concentration of the powdered coal in a pipeline can be achieved at the same time. The device is easy to operate and has a relatively high automation degree, and the measurement process does not need artificial interference; and by virtue of computer calculation, a measurement result close to reality can be given, manpower and material resources are saved, and daily running monitoring and maintenance work of coal-fired boiler equipment are facilitated.

This invention relates to a diversity receiving system for total digitalized space optical communication array signals including a host receiver and multiple under communication receivers mounted on the rotation unit of each universal shaft, each receiver includes a following module and a communication receiving module, the host receiver includes a host signal process module, each under communication receiver scans and follows signal sources on the total space angles independently and communicates with it, which can be used in the rigorous spacial laser channels including atmosphere sea channels of satellite and sea channels for under water target.

The invention relates to a laser-cladding nozzle, and belongs to the technical field of laser processing. The nozzle is characterized in that a beam of laser is turned into two beams of laser through an effect of a beam splitter and the two beams of laser enter a molten pool from laser channels on the two sides of the nozzle; powder is fed into a powder chamber from multiple directions and do downward motion under the effect of a minitype air blower so that a uniform powder stream is formed under the effect of a powder separation sieve; the convergence accuracy of the periphery of the powder is guaranteed by a circle of collimation protecting gas; because an angle sensor arranged in the middle of the nozzle, the protection gas quantity can be increased when the nozzle inclines, the segregation, caused by gravity, of the powder is possibly reduced, annular protecting gas also exists at the periphery of the front end of the nozzle and can protect the molten pool in a coverage manner; a middle nozzle can cool the nozzle by using a spiral cooling water channel; due to a protective cover of the end part, full reflection of the laser is facilitated and work returning pieces and powder can be fully utilized; a cooling water path for cooling in time is also arranged on the protective cover. The laser-cladding nozzle has a simple structure and is high in powder convergence accuracy; moreover, the light-powder coupling accuracy is improved, and the collimation property and the utilization rate of the powder can be improved.

The invention discloses a laser millimeter wave integrated ranging and speed measuring radar method. Modulated optical signals are filtered to generate broadband linear frequency modulation laser signals and broadband linear frequency modulation millimeter wave signals in two channels respectively. The laser signals are divided into laser local oscillation signals and laser emission signals, the laser emission signals are emitted, laser echo signals are received, coherent light mixing is carried out on the laser echo signals and the laser local oscillation signals, and laser channel ranging and speed measuring data are obtained through filtering, analog-to-digital conversion and Fourier transform; the millimeter wave signals are divided into millimeter wave local oscillation signals and millimeter wave emission signals, the millimeter wave emission signals are emitted, millimeter wave echo signal are received, frequency mixing coherent reception is performed on the millimeter wave echosignals and the millimeter wave local oscillator signals, and Fourier transform is used to obtain millimeter wave channel ranging and speed measuring data. Finally, the data of the two channels are fused. According to the invention, the structure is compact, the compatibility is higher, more complex environment can be adapted to, the sweep frequency bandwidth and the repetition frequency can be greatly improved, and bandwidth setting is freer.

The invention relates to a laser rust removing device and a laser rust removing method based on a laser texturing technology. The laser rust removing device comprises a laser, a protective gas cylinder, a rust removing head, a gas adsorption device and a machine swiveling jib, wherein a laser channel is formed in the rust removing head; the rust removing head consists of a rust removing head body and a rust removing nozzle; the rust removing nozzle is provided with a gas adsorption channel and a gas adsorption tube interface; the gas adsorption channel is communicated with the gas adsorption tube interface; the rust removing head body is provided with a transmission optical fiber interface, a focusing lens and a protective gas tube interface; the protective gas tube interface is communicated with the laser channel; the laser is connected with the transmission optical fiber interface through a transmission optical fiber; the protective gas cylinder is connected with a protective gas tube interface through a protective gas tube; the gas adsorption device is connected with the gas adsorption tube interface through a gas adsorption tube; and the entire rust removing head is arranged on the machine swiveling jib to realize upward, downward, leftward and rightward multi-angle movement. Due the adoption of the rust removing method in which the device is used, a better rust prevention effect is achieved on a material surface in comparison to coating of protective pain after single laser rust removal.

A projecting head of a laser pointer has a base, a gear wheel, a positioning stage and a cap. The base has a front end and a laser channel. The laser channel is formed through the base to allow a laser light to pass through. The gear wheel is mounted rotatably on the front end of the base and has multiple different imaging patterns. Each imaging pattern selectively covers the front opening of the laser channel of the base when rotating the gear wheel. The positioning stage holds the gear wheel between the base and the positioning stage and has a passage that allows the laser light to pass through. The cap has an annular gear engaging the gear wheel. Therefore, the gear wheel will rotate when the cap is rotated. Consequently, the projecting head will follow the rotating gear wheel to present different projected patterns.

In the present invention a Multi-Wavelength Ring Laser Source (MWRLS) design based on Erbium Doped Fiber Laser is provided. A LiNbO3 modulator is used to extend laser channels and as mode-locking device.

The invention provides a waste-toner-free cartridge. The waste-toner-free cartridge comprises a box body, a photosensitive drum, a charging roller, a developing roller and a cleaning component; the box body is provided with a containing cavity, an opening and a laser channel, the opening is communicated with the containing cavity, and the opening and the laser channel are oppositely arranged in the width direction of the box body; the photosensitive drum is rotatably mounted at the opening; the charging roller is in contact with the peripheral surface of the photosensitive drum; the developing roller is rotatably mounted in the containing cavity; the developing roller is in contact with the peripheral surface of the photosensitive drum; the charging roller and the developing roller are arranged at an interval; the photosensitive drum, the charging roller and the cleaning component are all located in the containing cavity; the cleaning component is installed on the box body and extends in the direction parallel to the charging roller; and the cleaning component makes contact with the peripheral face of the charging roller. The capacity of the waste-toner-free cartridge can be increased, and waste toner can be avoided.

The invention discloses a mini-type wearable non-invasive blood glucose monitor. The mini-type wearable non-invasive blood glucose monitor comprises an optical fiber probe, a laser device and a spectrometer detector, wherein the optical fiber probe comprises a laser channel, a Raman scattering collection channel and a detection channel; the laser channel is connected with the detection channel through an optical filter; the laser channel is internally provided with an incidence optical fiber, a first collimation lens and an optical filter; the detection channel is internally provided with a second collimation lens, a detection optical fiber and a self-focusing lens; the Raman scattering collection channel is internally provided with an optical filter, a third collimation lens and a collection optical fiber; the laser device is connected with the incidence optical fiber in the laser channel; and the spectrometer detector is connected with the second optical filter in the Raman scattering collection channel. According to the mini-type wearable non-invasive blood glucose monitor disclosed by the invention, the self-focusing lens is used as a collection lens so that a light source can be gathered to the surface of an object to be detected; and no gap is formed between the probe and the object to be detected and a condition that a signal in the environment enters the probe is avoided.

The invention discloses an urban-tree carbon content estimation method based on multi-echo airborne-laser-scanning data. The methods include: S1, using a multi-spectroscopic airborne laser scanner toscan urban trees to obtain the multi-echo ALS point cloud data of multiple flight strips; S2, preprocessing the multi-echo ALS point cloud data of the multiple flight strips to obtain nDSM data and intensity images of all laser channels; S3, classifying the nDSM data, and extracting tree category data therein to obtain a crown height model (CHM); S4, estimating shape parameters of the trees by thecrown height model, wherein the shape parameters of the trees include crown height and crown diameters; S5, firstly, building an ALS-DBH regression model by an empirical model, and then carrying outverification through selecting a plurality of tree samples on site; and S6, estimating a carbon content according to DBH and the crown height of all species. The method is based on the tree shape parameters of ALS and an allometry model, and can carry out fast and non-destructive estimation on the urban-tree carbon content.

The invention belongs to a matching device of laser processing equipment, and relates to a laser cladding head, in particular to a central powder conveying-type expandable multi-beam laser cladding head and the application thereof. The central powder conveying-type expandable multi-beam laser cladding head mainly comprises a main body frame, a powder conveying pipe and at least two laser output heads, wherein a central through hole vertically running through the top and the bottom of the main body frame is formed in the main body frame; the powder conveying pipe runs through the central through hole and is fixed to the main body frame; the laser output heads are circumferentially distributed at the top of the main body frame by taking the powder conveying pipe as a center; laser passages coaxial with laser beams are further formed in the main body frame in the directions of the laser beams; the center axes of the laser passages are coplanar with the center axis of the central through hole, and the inclined angle between two axes is an acute angle, so that the powder conveying pipe is enabled to be not positioned in a laser light path. The central powder conveying-type expandable multi-beam laser cladding head solves the problems that the conventional central powder conveying-type laser cladding head is complex in structure and low in laser energy utilization rate are solved; the central powder conveying-type expandable multi-beam laser cladding head can be applied to the field of general laser metal surface cladding, laser repairing, laser welding, rapid laser metal manufacturing and the like.

The invention discloses an inner-cooling nozzle for laser cladding, which comprises a laser channel disposed at the center of the nozzle, a powder channel disposed at the periphery of the laser channel, and an annular cooling channel disposed on the nozzle for high-pressure air or liquid injection; a center axis of the annular cooling channel superposes a center axis of the laser channel. Another technical scheme provided by the invention is that: an inner-cooling nozzle for laser cladding comprises a laser channel disposed at the center of the nozzle, a powder channel disposed at the periphery of the laser channel, and a spiral cooling channel disposed on the nozzle for high-pressure air or liquid injection; a center axis of the spiral cooling channel superposes a center axis of the laser channel. Three coaxial schemes of coaxial powder injection, coaxial protective gas, and coaxial cooling are designed in one laser nozzle, which provides good cladding effect, high efficiency, and more safety and reliability.

The invention discloser a device and a method for generating tunable terahertz radiation by use of hollow laser plasma. The objectives of the invention are that the hollow plasma is formed through ionization of hollow laser and an inert gas tunnel; the hollow plasma has enormous capability to restrain and convert electromagnetic energy; the electromagnetic energy restrained and stored in the hollow plasma is converted into terahertz waves; and the radius and density of the hollow plasma is adjusted by adjusting the radius of the hollow laser, so adjustment of the frequency of the terahertz waves is achieved. The device provided by the invention comprises a hollow laser generator and a terahertz radiation generation device. The terahertz radiation generation device comprises a base body which is internally provided with an energy storage cavity. A laser channel penetrating the base body is arranged on the base body of the two ends of the energy storage cavity. An electrode is arranged in the energy storage cavity and is connected with a direct current power supply or a pulse driving source. A sealed tee is arranged on the base body and communicates with the energy storage cavity.

The invention discloses a laser nozzle device. The device comprises an outer sleeve and a nozzle core arranged in the outer sleeve, wherein the side wall at the upper end of the outer sleeve is provided with a powder inlet externally connected with a powder inlet pipe; a powder outlet is arranged between the lower end of the outer sleeve and the lower end of the nozzle core; a powder channel is arranged between the inner side of the outer sleeve and the outer side of the nozzle core and extended to the powder outlet, and the powder inlet, powder channel and powder outlet are intercommunicated; the outer side wall of the nozzle core is embedded with a plurality of steel balls, and a laser channel is arranged in the nozzle core; and the upper of the outer sleeve is muff-coupled with the upper end of the nozzle core. The invention also provides a method for uniformly distributing powder by the device. Because the device uses the steel balls, the uniform conveying of powder is realized without needing a longer power-conveying channel, so that the overall size of the nozzle is reduced, the complexity of a powder-conveying system matched with the device is greatly lowered, and the operability of the nozzle device is improved.

The present invention relates to wavelength tunable DBR semiconductor laser devices in which light waves generated from a plurality of laser portions (or laser channels) are combined. This type of semiconductor laser device requires that the laser channels together cover an entire desired wavelength range, allowing the oscillation wavelength to be continuously varied over this range. However, to accomplish this, it is necessary to employ highly accurate crystal growth and process techniques. Furthermore, the length of the gain region must be reduced to increase the range over which the oscillation wavelength can be continuously varied, making it difficult to achieve laser oscillation. Two laser channels operate in combination, and a combiner combines the light waves emitted from these laser portions (or laser channels) so as to cover one entire wavelength range. Specifically, an inter-grating element distance Lgrt1 of the first laser portion is set larger or smaller than an inter-grating element distance Lgrt2 of the second laser portion by one half of the grating pitch. This allows these laser portions to exhibit different mode-hopping DBR current values appropriately adjusted against each other and thereby together cover a desired wavelength range.

The invention discloses a water spray cooling laser cutting system. The water spray cooling laser cutting system comprises a cutting head, a water pump and a compression air pump; the cutting head comprises a nozzle and a ceramic body; the nozzle is in insulation connection with a machine frame through the ceramic body; the ceramic body is provided with a water spray channel; conveying pipelines are arranged between the water pump, the air pump and the water spray channel; the axis of the nozzle is provided with a laser channel for allowing laser to pass; the cutting head is provided with a plurality of spraying holes surrounding the laser channel; and when the ceramic body is connected with the nozzle, the water spray channel communicates with the multiple spraying holes. In addition, theinvention further discloses a cutting method of the water spray cooling laser cutting system. According to the water spray cooling laser cutting system and the cutting method thereof, water spray canquickly evaporates to take away heat when being sprayed on the surface of a cutting plate, the spraying path is moved along with moving of the cutting head, energy saving is achieved, in addition, targeted cooling is efficiently conducted, cutting stability is ensured, and the effect that the overall cutting edge is regular and smooth is realized.

The invention relates to the technical field of laser communication, and provides a laser communication method and system based on a two-dimensional laser phased array, and the method comprises the steps: employing an active two-dimensional phased array technology to overcome the interference of atmospheric turbulence on a laser channel, achieving the scanning of a designated area through coherent combination of light beams, finding a target, and building an effective laser communication channel with the target after the target is stably tracked. The system comprises a transmitting unit, a receiving unit and a display control unit, wherein the transmitting unit comprises a laser, a laser beam splitter, a laser phase controller, a laser communication encoder, a laser amplifier, a laser beam combiner, a microlens array and a transmitting optical module; the receiving unit comprises a receiving optical module and an imaging sensor; the display control unit comprises an image processing computer. According to the method and the system provided by the invention, the laser two-dimensional phased array technology and the laser communication technology are combined, the physical experiment research of an algorithm and a hardware system is carried out, and the method and the system are of great significance for improving the laser communication capability.

The invention provides an alkali metal steam chamber with a double layer structure. The alkali metal steam chamber with a double layer structure includes an inner layer steam chamber and an outer protection air chamber, wherein the inner layer steam chamber is arranged in the outer protection air chamber, and is fixed together with the outer protection air chamber through a heat insulation supporting structure; a window of the inner layer steam chamber and a window of the outer protection air chamber are arranged coaxially to form a laser channel; the inner layer steam chamber is filled with buffer gas; and the outer protection air chamber is filled with protection gas. The alkali metal steam chamber utilizes the double layer structure to improve the integral sealing property of the alkali metal steam chamber, and isolates the inner layer steam chamber in the high temperature state from the outside through the outer protection air chamber, so that the requirement for the high temperature sealing property of the inner layer steam chamber is reduced and the available sealing structure types are widened. As the outer protection air chamber is under the non high temperature environment, fine air tightness can be maintained; and even small leakage occurs in the inner layer steam chamber, the leaked protection gas of the outer protection air chamber does not cause deterioration of the alkali metal in the inner layer steam chamber, so that the service life of the alkali metal steam chamber can be prolonged.

The invention belongs to the technical field of laser cladding equipment, and particularly relates to a laser cladding device for inner walls of medium-diameter and small-diameter pipelines. The lasercladding device comprises an optical fiber connector, a cylinder, a powder feeding nozzle, a cladding head, a fixing device and an adjustment device, wherein the cylinder and a mechanical arm are connected through the fixing device. The cylinder comprises a laser channel, a powder feeding pipe and a water cooling pipe. A collimating lens, a protective lens and a focusing lens are sequentially arranged in the laser channel in the laser advancing direction. The optical fiber connector is fixedly connected with the left end of the cylinder. The adjustment device comprises a first small electrictelescopic rod machine fixedly arranged at the top end of the outer wall of the cladding head and a second small electric telescopic rod machine fixedly arranged at the right end of the outer wall ofthe cladding head. Electric telescopic rods of the first small electric telescopic rod machine and the second small electric telescopic rod machine stretch into the cladding head separately from the outer walls of the top end and the right end of the cladding head to be connected with the two ends of a reflector, and the reflector is made to rotate by controlling the two telescopic rods. The powder feeding nozzle is fixedly mounted at the bottom end of the outer wall of the cladding head. By adoption of the laser cladding device, the problem that laser cladding of the inner walls of the medium-diameter and small-diameter pipelines is limited by the space is solved.

The invention discloses an integrated laser cladding head. The integrated laser cladding head comprises a cladding head body, wherein a laser channel for allowing laser to pass through is arranged in the center of the cladding head body; a focusing device is arranged at the upper part of the cladding head body; the focusing device comprises a converting frame, lenses with three different specifications, a rotating shaft and a rotary knob; the lenses are embedded in three circular rings of the converting frame; the rotary knob is connected with the rotating shaft through the converting frame; the laser is focused through the lenses; a cooling water channel is arranged outside the laser channel; the cooling water channel spirally surrounds the laser channel; four powder channels are uniformly distributed outside the cooling water channel in the axial direction; and four protective gas channels are uniformly distributed outside the powder channels in the axial direction. According to the integrated laser cladding head, the focusing device comprises the lenses with three different specifications, the lenses can be freely switched to change the laser spot shape, the spiral cooling water channel is arranged outside the laser channel, the cladding head is difficult to heat, the four powder channels are uniformly distributed outside the cooling water channel in the axial direction, the powder channels are not liable to block, and the powder spraying is smooth.

A laser communications terminal configured for simultaneous two-way stabilized communications links to multiple ground sites. One example of such a laser communications terminal includes a plurality of laser channels, each including a channel transceiver configured to transmit and receive an optical signal, an afocal telescope optically coupled to each of the channel transceivers, a celostat minor pair optically coupled to the afocal telescope, and a plurality of beam steering mirrors, at least one beam steering mirror associated with each channel of the plurality of laser channels and configured to independently steer the corresponding optical signal within a field of view of the afocal telescope.

Disclosed is a laser nozzle for metal powder laser forming. The laser nozzle for metal powder laser forming comprises an inner pipe. A laser channel is formed in an inner cavity of the inner pipe, a powder conveying sleeve, a gas flow sleeve and an outer cooling sleeve are arranged outside the inner pipe in sequence in a sleeving mode, a powder channel is formed between the inner pipe and the powder conveying sleeve, and a gas channel is formed between the powder conveying sleeve and the gas flow sleeve, and the inner pipe, the powder conveying sleeve, the gas flow sleeve and the outer cooling sleeve are coaxially arranged. A condensing lens is installed at the upper end of the laser channel. A powder inlet is formed in the upper end of the powder channel, and a powder outlet is formed in the tail end of the powder channel. A gas inlet is formed in the upper end of the gas channel, a gas outlet is formed in the tail end of the gas channel, and the tail end of the outlet of the laser channel, the tail end of the powder outlet and the tail end of the gas outlet are located on the same plane. The laser nozzle for metal powder laser forming is simple in structure, reasonable in design and stable in product quality, and convenient to operate, lasers, gases and powder are sprayed through the nozzle at the same time, manufactured metal parts have excellent quality, and the dimensions can be accurately controlled.