399 results about "Laser heating" patented technology

A method of making a vacuum insulating panel, the vacuum insulating panel comprising a first glass substrate, a second glass substrate, a plurality of spacers provided in a gap between at least the first and second glass substrates, and a seal provided between at least the first and second glass substrates, the seal comprising a first seal layer and / or a second seal layer. The method may include laser heating, using a laser beam from a continuous wave near-IR laser, seal material in order to form the first seal layer; wherein the laser heating may include causing the laser beam to move at a lateral speed of from about 5-70 mm / second relative to the substrates and the first seal material so that the laser beam at least partially passes through at least one of the glass substrates and impinges upon at least the second seal layer in order to heat the second seal layer and fire and / or sinter the first seal material thereby forming the first seal layer.

The invention provides a temperature control system of an electrostatic adsorption disc and an improvement method of temperature control performance. According to the system, a temperature control layer is arranged in an electrostatic adsorption disc, and the temperature control layer comprises a graphite heat absorption layer and a graphene heat conduction layer; the system further comprises a laser generator and a controller. During working, the laser generator emits heating laser to the graphite heat absorption layer, so that the graphite heat absorption layer efficiently absorbs energy to generate heat, and then the heat is quickly and uniformly conducted to the surface of the electrostatic adsorption disc through the graphene heat conduction layer with ultrahigh heat conductivity. Laser heating is used for replacing traditional resistance heating, graphene heat conduction is used for replacing traditional metal heat conduction, the method has the advantages of being high in temperature switching speed, high in control precision, good in temperature uniformity and the like, and the temperature control performance of the electrostatic adsorption disc can be remarkably improved.

The invention provides an online detection and compensation method for local decarburization of a high-strength spring steel band, which comprises the following steps: arranging an oxygen content sensor in a continuous annealing furnace to monitor oxygen concentration in real time, and marking a potential decarburization risk section; scanning the risk section steel strip by adopting infrared thermal imaging, and generating a carbon distribution map to position a decarburization area; pulse laser heating is conducted on the decarburization area, and methane-argon mixed gas is introduced to achieve in-situ carburization; and finally, local thermal stress is eliminated through high-frequency induction heating. According to the method, decarburization risk dynamic early warning, defect accurate positioning, local efficient carbon supplementation and stress homogenization control are achieved, and the surface quality and fatigue performance of the steel strip are remarkably improved.

The invention discloses a temperature-controllable laser heating device and method, and relates to the technical field of laser heating, and the device comprises a laser generator which is used for generating a laser beam for heating; the triangular prism assembly is arranged on the same side of the laser generator and the detection control module and is used for refracting the laser beams to irradiate the power equipment for heating and refracting infrared radiation generated by the power equipment to irradiate the detection control module; the detection control module is used for detecting the infrared radiation so as to obtain the actual temperature of the heating point of the power equipment, and adjusting the output power of the laser generator based on the actual temperature and the preset temperature so as to control the deviation between the preset temperature and the actual temperature; the laser beam is refracted to irradiate the power equipment for heating, the actual temperature of the heating point is obtained, the output power of the laser generator is adjusted based on the actual temperature and the preset temperature, the device can be used without modification, and the problems of randomness of training content and concealment of examination content are solved.

The invention relates to the technical field of material corrosion and protection, discloses a TP2 copper corrosion behavior testing method based on temperature regulation and control, and aims to solve the problem that in the prior art, various physical and chemical parameters in the corrosion process are difficult to synchronously obtain under the same microscale, so that a local corrosion dynamics mechanism cannot be deeply revealed. The core of the system is a coaxial three-function composite probe integrated with thermal, acoustic and electrochemical sensing units, and the coaxial three-function composite probe is matched with a synchronous laser heating module and a multi-physical field synchronous control system. During testing, the probe scans on the surface of a sample, local thermal disturbance is applied to each pixel point, and the interface temperature, acoustic impedance and corrosion rate data of the point are synchronously collected. According to the invention, through high integration in structure and accurate synchronization in time, the space mismatch error of multi-source measurement is eradicated, and multi-physical field distribution images which are accurately corresponding to each other can be obtained in situ and losslessly.

The invention discloses a working temperature control method of a Josephson probe and a method for regulating and controlling the thickness of an Nb film, the working temperature of the Nb-based probe is increased to 7.2 K by regulating and controlling the film thickness parameter and controlling the working temperature of the probe, and the highest record of similar probes is created. According to the method for regulating and controlling the thickness of the Nb film, a four-groove quartz tube is selected as a substrate, and after ultrasonic cleaning, a nano needle tip is drawn by adopting a laser heating method, so that a needle tip structure with a clean surface and a controllable geometric structure is obtained; and horizontally fixing the prepared nano needle tip on a probe bracket, depositing a niobium film by adopting a magnetron sputtering process, and controlling the thickness of the Nb film to prepare the Josephson probe. According to the invention, the dependence of the probe on an extremely low temperature environment is obviously reduced, the limitation of the original process is broken, the available film thickness range is effectively widened, the preparation yield and the performance consistency of the probe are obviously improved, and a reliable device basis is provided for the practical development of near-field microwave imaging and quantum sensing technologies.

The invention belongs to the technical field of temperature characterization, and discloses a semiconductor device temperature characterization method and system. The semiconductor device temperature characterization scheme provided by the invention comprises the following steps: bearing a semiconductor device and adjusting the position of the semiconductor device by using a device bearing and adjusting unit; respectively emitting detection laser and heating laser by using a detection laser emitting unit and a pumping laser emitting unit, and irradiating the detection laser and the heating laser to a test area of the semiconductor device; collecting and recording a temperature measurement signal reflected by the semiconductor device by using a temperature measurement unit; the device operation control unit is used for providing an electric signal for the semiconductor device and synchronously triggering the temperature measurement unit to record a temperature measurement signal so as to ensure the synchronization of online work and temperature measurement of the semiconductor device; and obtaining transient temperature characterization information of the semiconductor device based on the temperature measurement signal by using the main control unit. According to the invention, temperature characterization of nanosecond-level time and submicron-level spatial resolution of the semiconductor device can be realized.

The invention relates to the technical field of packaging equipment, in particular to semiconductor laser packaging equipment and a using method thereof.The semiconductor laser packaging equipment comprises a rack, a packaging table and a laser heater and further comprises an electric push rod, an air exhaust assembly and a plugging assembly, the electric push rod is arranged on the rack, and the air exhaust assembly is arranged at the output end of the electric push rod; the plugging assembly is arranged in the air exhaust assembly, the air exhaust assembly comprises an adsorption part, an air hole is formed in the adsorption part and is formed below the plugging assembly, the air exhaust assembly generates negative pressure and adsorbs a chip when being powered on and started, and the electric push rod drives the air exhaust assembly to drive the plugging assembly and the chip to move downwards when being powered on and started. Through the arrangement of the air exhaust assembly and the plugging assembly, the situation that stress is concentrated on the bonding surface of the chip and the welding flux due to local cooling can be avoided, gaps generated when the welding flux is molten can be eliminated through vibration generated by impact, and the quality and reliability of packaged products are effectively improved.

The invention belongs to the technical field of mechanical part machining, and particularly relates to automatic feeding and discharging laser cutting equipment for flange plate production. The automatic feeding and discharging laser cutting equipment comprises a workbench, a slag discharging opening is formed in one side of the upper end of the workbench, a recycling opening is formed in one side of the lower end of the workbench, and the recycling opening is in an inverted right triangle shape and communicates with an inner cavity of the slag discharging opening; a discharging cleaning assembly is arranged in an inner cavity of the slag discharging opening, a feeding cutting assembly is arranged above the slag discharging opening and used for cutting an alloy steel plate machining flange plate, and the problems that due to cutting of existing laser cutting equipment, a large amount of waste residues generated through laser heating gasification can be generated, the waste residues are accumulated in a workbench for a long time, and the waste residues generated through laser heating gasification can be mutually bonded and blocked; if the flange plate is cleaned in time, the penetrability of the laser cutter can be influenced by waste residues, and after the flange plate is cut, the alloy steel plate, the flange plate and waste materials need to be separated and recycled, so that the operation is tedious, and the production efficiency of the flange plate is influenced.

The invention discloses a liquid nitrogen cooling and laser heating collaborative auxiliary cutting device and a cutting method thereof. The device comprises a laser heating system, a liquid nitrogen cooling system, a cutting system, a tool temperature monitoring system and a control system. Laser emitted by the laser heating system is focused on a to-be-machined area of a workpiece in front of a cutting edge after transmitting through the cutter body; the liquid nitrogen cooling system accurately sprays liquid nitrogen to the cutting edge area of the tool through a heat insulation liquid supply pipeline and a nozzle which are integrated in the tool rest. The control system dynamically and synergistically adjusts the laser output power and the liquid nitrogen injection flow based on a temperature signal sent by a thermocouple embedded in the cutter. According to the device, parallelism of the two processes of laser heating of a workpiece and liquid nitrogen cooling of a tool is achieved in space, dynamic matching and accurate balance of laser heating and liquid nitrogen cooling are achieved in time, and the problems that in laser-assisted cutting, the tool is prone to thermal damage, the cooling efficiency is low, and a thermal field is out of control are effectively solved.

The invention relates to a device and a method for preparing a gradient heterogeneous structure nickel-based alloy, and belongs to the related technical field of metal material preparation, the device sequentially comprises an uncoiling device, a first guide roller, a pinch roller, a cooling box, a pinch roller, a laser heating device, a roller group, a second guide roller and a coiling device along the direction of a production process; the cooling box sequentially comprises a cleaning section, a deep cooling section and an air cooling section in the production process direction. The laser heating device comprises laser sources which are symmetrically arranged up and down, the nickel-based alloy plate strip with the gradient structure can be efficiently produced through the continuous rolling and cooling process, the requirement for batch application of high-performance materials in the modern industry is met, and through the synergistic effect of copious cooling, laser heating and rolling, the high-performance nickel-based alloy plate strip with the gradient structure can be obtained. The nickel-based alloy forms a continuous hardness / grain size gradient along the thickness direction; and high strength and anti-fatigue performance are both considered.

The invention discloses a surface-enhanced Raman detection method based on laser-induced deposition, and belongs to the technical field of micro-nano particle deposition and detection. According to the method disclosed by the invention, the gold nanoparticles and the to-be-detected particles are driven to be enriched and precisely deposited to a target area by utilizing laser local heating, and Raman detection is synchronously carried out, so that high-sensitivity detection on trace substances is realized. According to the method, the problems of uneven particle deposition, uncontrollable signal enhancement and the like in the traditional surface enhanced Raman scattering substrate preparation are solved, meanwhile, the requirement of an extra laser source in a traditional detection method is avoided, and integration of laser deposition and detection is realized.

The invention relates to a to-be-cut solar cell and a photovoltaic module, and the cell comprises a cell body, and the surface of the cell body is provided with a laser heating enhancement region; the laser heating enhancement area is provided with a light trapping part and a heat absorption part, and a to-be-cut line of the battery piece body is located in the laser heating enhancement area; the light trapping part is arranged on the surface of the laser heating enhancement area; the heat absorption part and the light trapping part are at least partially overlapped, and the heat absorption part is arranged on the to-be-cut line. The light trapping part can improve the light incidence effect and increase the utilization rate of laser energy, the heat absorption part can absorb laser and heat around the light trapping part so as to improve the temperature of laser cutting at the position of the to-be-cut line, and therefore under the condition that low laser output power is adopted, the laser cutting efficiency is improved. The heat on the solar cell is not reduced, the effect of cutting the solar cell can still be realized, the damage to the surface of the solar cell is reduced, the power loss of the solar cell is reduced, and the power generation efficiency and long-term reliability of the photovoltaic module are improved.

According to the rolling device and method for multi-step incremental forming of the ultra-high-strength plate, through cooperative finishing of laser local heating and a small fillet forming roller, the minimum forming fillet radius of the ultra-high-strength plate can be compressed to be smaller than or equal to 2T (T is the thickness of the plate) from R larger than or equal to 3T in traditional cold rolling; while the design freedom degree and the structural performance of the part are remarkably improved, the cold hardening high-strength state of a non-heating area is precisely kept, and the overall softening defect caused by a hot stamping process is thoroughly avoided; and as the forming force mainly acts on the local softening area, the required forming force is obviously reduced, and meanwhile, the springback of the softening area can be effectively inhibited, so that the size precision and the shape stability of the small fillet are ensured. The device serves as an independent unit and can be conveniently integrated at the tail end of an existing rolling line, subversive transformation of the whole production line is not needed, and high economical efficiency and practical value are achieved.

The embodiment of the invention discloses a laser heating method and a related device, which are used for improving the heat uniformity of an object to be heated. The controller is applied to the heating system, the heating system further comprises a bearing platform and a plurality of laser units, a to-be-heated object is placed on the bearing platform, and the method comprises the following steps: determining and starting a plurality of target laser units from the plurality of laser units, and determining a target partition according to an obtained thermal image containing the to-be-heated object, the target laser units are in one-to-one correspondence with the target partitions; for each target laser unit, acquiring pixel temperature values of a plurality of pixels involved in a target partition corresponding to the target laser unit, and determining a target partition temperature value of the target partition according to the pixel temperature values of the plurality of pixels; and obtaining a corresponding target power difference value according to a difference value between the target partition temperature value and a preset temperature value, and adjusting the power of the target laser unit based on the target power difference value so as to stabilize the target partition temperature value at the preset temperature value.

The invention discloses a particle erosion test device and method, and belongs to the technical field of particle erosion tests.The particle erosion test device comprises a clamping piece used for clamping a workpiece, a sand blasting device and a laser emitter, and the laser emitter is used for emitting laser to irradiate the workpiece so as to heat the workpiece; the particle erosion test device further comprises cooling water pipes and a vacuum pipe, the vacuum pipe is arranged outside the laser transmitter in a sleeving mode, the two opposite ends of the vacuum pipe are connected with the cooling water pipes, and the cooling water pipes are communicated with the cooling water tank. The cooling water pipe is used for introducing circulating cooling water into the vacuum pipe so as to adjust the temperature of the laser transmitter, and the air compressor sprays compressed air to the workpiece through the compressed air spraying pipe so as to cool the workpiece. Through combined use of the laser heating device and the particle erosion device, a particle erosion test in an extreme environment is stably simulated, and the effectiveness of the test is ensured.

The invention belongs to the field of material microstructure research and analysis, and particularly relates to an in-situ solidification observation experiment and analysis method for nickel-based superalloy. Aiming at the defect that the dynamic evolution behavior of the structure of the nickel-based superalloy in the solidification process is difficult to continuously, clearly and quantitatively treat, the method comprises the following steps: performing laser heating on an alloy sample to be above liquidus temperature at a set cooling rate of a high-temperature laser confocal scanning microscope, and guiding the alloy sample to be stably solidified in a microscopic view range; dynamic tracking of the whole process from melting, nucleation to complete solidification is achieved, continuous evolution images of microstructures are obtained in real time, image data are subjected to quantitative analysis in combination with Image J, Image Pro Plus, Origin and other software, alloy solidification behavior characteristics and the response relation between the alloy solidification behavior characteristics and set process parameters are judged according to analysis results, and the alloy solidification behavior characteristics can be determined according to the analysis results. Therefore, quantitative evaluation of the solidification process promotion or inhibition effect under different process parameter conditions is realized.

The invention provides a forming method for a curved frame component of an aircraft made of a thermoplastic composite material, which comprises the following steps: S1, based on a mathematical model of the curved frame component, laying the thermoplastic composite material through an automatic fiber laying process to form a preformed body flat plate; s2, the preformed body flat plate is cut to the preformed body size required by mold pressing along the laid positioning tows; and S3, the preformed body flat plate is subjected to mold pressing through a hot mold pressing process to form the curved frame component in a preset shape. According to the scheme, the thermoplastic composite material preform flat plate is prepared by adopting an automatic fiber placement process, so that automatic and accurate positioning of fibers can be realized, and interlayer bonding stability can be realized through high-energy laser heating. In addition, the material sheets can be accurately positioned through the hot mold pressing process, and therefore rapid mold pressing forming of parts with complex characteristics is achieved.

The invention provides an SLM preparation process method for TC4 powder with wide particle size distribution. The SLM preparation process method comprises the following steps that firstly, a first layer of titanium alloy powder is laid on a forming substrate at the powder laying speed of 100 mm / s-200 mm / s; secondly, according to the particle size and particle size distribution characteristics of the current layer of titanium alloy powder, corresponding laser heating melting parameters are selected for laser heating melting, and cooling solidification is conducted; thirdly, the thickness of the formed substrate is reduced by 90-120 micrometers, and a next layer of titanium alloy powder is laid on the basis of the current layer of titanium alloy powder; fourthly, the first step to the third step are repeated, and layer-by-layer stacking is conducted till the titanium alloy part is formed; according to the method, the problems of high porosity, poor forming quality and low performance of wide-size-distribution TC4 powder in SLM forming can be effectively solved, meanwhile, the advantages of low cost and short period of a wide-size-distribution scheme are fully played, and high-quality forming of high-cost-performance TC4 alloy components is achieved.

The invention discloses a water, electricity and light independent separation multi-cavity laser heating system and device. The system comprises a laser generating module, a light beam guiding module, a double-cavity isolation module and a variable light spot adjusting module. The laser generating module outputs a laser beam, the light beam guiding module enables the laser beam to be transmitted according to a preset path through light path steering, the double-cavity isolation module comprises a laser action cavity and a cooling medium cavity which are mutually independent, and the variable light spot adjusting module is integrated in the laser action cavity to adjust the dimension of a light spot. The device comprises a frame assembly, a laser emitting part, a reflecting part, a lens adjusting part and a cooling part, the laser emitting part outputs light beams, the light beams enter a laser cavity after being turned by the reflecting part, the lens adjusting part adjusts the light spot width, and the cooling part is communicated with a water path of a lens fixing seat through a water cooling pipe to achieve cooling. The laser action cavity and the cooling medium cavity are subjected to double-cavity separation, and the problems that when light spots are adjusted, a pipeline is prone to being pulled and large in size, and cooling is affected by laser radiation are solved.

The invention discloses a heat pipe and laser cooling and heating combined auxiliary cutting device and method. A laser device is arranged on a three-degree-of-freedom clamp and used for heating a workpiece through laser; the cutter is arranged on the three-degree-of-freedom clamp, and a heat pipe device is integrated in the cutter to reduce the temperature of the cutter; the non-contact temperature measuring device is used for acquiring the temperature of the cutting position of the workpiece; the control device correspondingly adjusts parameters of the laser device according to the temperature measured by the non-contact temperature measuring device so that the cutting position can reach the optimal temperature field. A heat pipe-laser cooling and heating combined auxiliary technology is used, the local area of a workpiece is heated through laser, the yield strength of a material is reduced, then the cutting force is reduced, and generation of sawtooth-shaped cuttings is effectively restrained. Meanwhile, the cutter is cooled through the heat pipe, and the temperature field is accurately controlled.

The invention belongs to the technical field of fusion connection of a thermoplastic composite material and a metal laminated structure, and discloses a laser fusion temperature and pressure coordinated control process method for the thermoplastic composite material and the metal laminated structure. According to the method, follow-up pressing force application and temperature control in the laser connection process are achieved, follow-up pressing force application is achieved through clamping mechanisms designed at the two ends of a laser welding actuator respectively, and the contact portion of the clamping mechanism on one side and a workpiece is in a single-roller pre-clamping mode; and the contact part of the clamping mechanism on the other side and the workpiece adopts a multi-pressing-roller pressing and pressure maintaining mode. According to the temperature control function, the temperature of a connection interface is fed back in real time through an infrared online sensing system, then the output power of a laser heating head is changed in a self-adaptive mode to dynamically regulate and control energy irradiated on the metal surface, and finally control over the interface temperature of the laminated structure is achieved. According to the method, the problems of poor connection quality and the like caused by poor temperature consistency of connection areas and different pressing forces are solved, and the interface connection effect of the thermoplastic composite and the metal laminated structure is effectively improved.

The embodiment of the invention discloses a laser heating device and laser welding equipment, the laser heating device comprises a first laser mechanism and a second laser mechanism, the first laser mechanism comprises a fixedly arranged first laser module, and the first laser module is used for emitting light to a target object to form a first light spot on the target object; the second laser mechanism comprises a rotationally arranged second laser module, and the second laser module is used for emitting light to the target object so as to form a second light spot on the target object; wherein the orientation of the first laser module is perpendicular to the axial direction of the rotating shaft of the second laser module, and the angle of the second laser module can be adjusted so as to adjust the splicing between the second light spot and the first light spot. The second laser module is rotatably arranged relative to the first laser module, and the angle of the second laser module can be adjusted, so that the splicing between the second light spot and the first light spot is adjusted, and the size, the shape, the power density and the like of the heating light spot are adjusted.

To enable utilization of a laser beam to dry a coating film of heat-resistant paint.SOLUTION: A method for drying heat-resistant paint includes the steps of irradiating a painted surface of a member to which heat-resistant paint is coated with a laser beam, and scanning an irradiation position to dry a coating film of the heat-resistant paint, where a laser irradiation condition includes a temperature at which heat-resistant paint is heated with the laser beam is 150 to 270 degrees, a scan speed of the laser beam is 0.5 to 6 m / s, and output of the laser beam is 460 to 2800 W.SELECTED DRAWING: Figure 1

An apparatus for heating a substrate within a thermal processing chamber is disclosed. The apparatus includes a chamber body, a gas inlet, a gas outlet, an upper window, a lower window, a substrate support, and an upper heating device. The upper heating device is a laser heating device and includes one or more laser assemblies. The laser assembly includes a light source, a cooling plate, an optical fiber, and an illumination window.

A method of making a vacuum insulating panel including a first substrate, a second substrate, a plurality of spacers provided in a gap between at least the first and second substrates, and a seal provided between at least the first and second substrates, the seal comprising a first seal layer, and optionally second and / or third primer layer(s). The method may include at least one of: (i) laser heating, using a laser beam from a laser, the first seal material for firing and / or sintering the first seal material to form the first seal layer, in a manner that causes TeO4>TeO3 in the first seal material to transform into TeO3>TeO4 due to said laser heating, whereby an amount of TeO4 decreases and an amount of TeO3 increases due to said laser heating, and / or (ii) laser heating in a manner that causes V2O5>VO2 in the first seal material to transform into VO2>V2O5 due to said laser heating whereby an amount of VO2 increases and an amount of V2O5 decreases due to said laser heating, so that after said laser heating the first seal layer comprises more VO2 than V2O5 by wt. %.

The application provides an online detection and compensation method for local decarburization of high-strength spring steel strips, which comprises the following steps: monitoring oxygen concentration in real time by arranging an oxygen content sensor in a continuous annealing furnace and marking potential decarburization risk sections; scanning the steel strips in the risk sections by infrared thermal imaging to generate a carbon distribution map and locate decarburization zones; performing pulse laser heating on the decarburization zones and introducing a methane-argon mixed gas to realize in-situ carburization; and finally eliminating local thermal stress by high-frequency induction heating. The method realizes dynamic early warning of decarburization risk, accurate positioning of defects, local efficient carburization and stress homogenization control, and significantly improves the surface quality and fatigue performance of the steel strips.

The application relates to a growth method of a single crystal fiber with a continuous gradient distribution of doping ions, comprising the following steps: cutting at least two homogeneous crystals or ceramics with different doping ion concentrations and a homogeneous crystal or ceramic without doping ions into square rods; selecting the square rod without doping ions as a first seed crystal, selecting the square rod doped with a first ion concentration as a first source rod, and performing a first forward growth of the single crystal fiber by using a laser heating base method; after the single crystal fiber doped with the first ion concentration is grown to a required length, adding a square rod doped with a second ion concentration as a source rod to continue the first forward growth of the single crystal fiber by fusion, and repeating the operation N times until the single crystal fiber doped with each ion concentration is grown to the required length; and sequentially performing a first reverse growth, a second forward growth and a second reverse growth on the obtained fused single crystal fibers with different doping ion concentrations to obtain the single crystal fiber with the continuous gradient distribution of the doping ions.

The present invention discloses a gas chamber temperature control method for a SERF inertial measurement device based on second harmonic generation. The method utilizes gas chamber optical depth information obtained by the SERF device's own detection system to perform feedback regulation on the laser heating power of the atomic gas chamber, thereby achieving real-time and stable control of the atomic density or temperature in the gas chamber. This avoids the magnetic field interference introduced by the use of thermal resistors as temperature sensors in existing solutions, thereby achieving truly non-magnetic, all-optical gas chamber heating and its control system, and helping to improve the sensitivity of the SERF inertial measurement device.

Disclosed in the present invention are a reaction device for narrow-band luminescence indium phosphide quantum dots, and a method for producing narrow-band luminescence indium phosphide quantum dots using the reaction device. The reaction device comprises a high gravity device and a photothermal device, wherein the high gravity device comprises a housing, an electric motor, a rotating disk, shear packing, a liquid distributor, a reaction chamber, a packing cover, a gas outlet, a liquid outlet and liquid inlets; and the photothermal device comprises a laser heating device, a circuit and water cooling device, a reflective layer and a laser controller. In the present invention, infrared laser is coupled into a high gravity reactor, and solvent media such as water or organic compounds are used to absorb infrared light and convert same into thermal energy to raise the temperature of the high gravity reactor, so as to initiate a nucleation reaction of a reactant precursor in a "micro-droplet reactor", thereby realizing the controllable growth of quantum dots in the micro-droplet reactor; and then nanoparticles of uniform size are finally obtained by means of controlling the laser irradiation and heating duration.