509 results about "Ir laser" patented technology

The invention discloses an airborne laser radar sounding data processing method and system, and relates to the technical field of marine surveying and mapping and earth observation, and the method comprises the following steps: collecting original full-waveform data of an airborne laser radar sounding system, the original full-waveform data comprising infrared laser channel data and blue-green laser multichannel data; joint denoising processing is carried out on the original full-waveform data to obtain denoised waveform data, and the joint denoising processing comprises background noise modeling and removing based on machine learning and random noise filtering based on frequency domain low-pass filtering; a collaborative joint denoising strategy is formed by fusing background noise modeling based on machine learning and frequency domain low-pass filtering based on signal-to-noise ratio optimization. According to the method, complex background noise can be accurately estimated and removed, random noise can be adaptively filtered out, weak underwater echo signals are reserved to the maximum extent, and the problem of water depth information loss caused by excessive smoothness is effectively avoided.

An additive manufacturing method based on micro-selective laser melting technology. By using a spot size of 30 μm or less, a metal powder layer thickness of 10 μm or less and ultrafine metal powders having a D90 particle size of 30 μm or less, and in combination with the control of a scanning laser power, a scanning rate, a linear energy density and a volumetric energy density within specific ranges, the method can print complex-structured metal parts having extremely high resolutions and surface smoothness, and can obtain a high-density internal structure of a component even under a relatively low energy density or power condition, thereby effectively protecting an optical system. Moreover, a printed component exhibits a defect-free microstructure, and has excellent electrical properties, thermal properties and mechanical properties. Particularly, ultrafine grains and a high dislocation density provide superior mechanical properties compared to conventional manufacturing materials. An infrared laser device can be used, thereby achieving low costs.

The invention discloses a preparation method of copper-based composite powder with high infrared laser absorptivity and a reaction device of the copper-based composite powder, and belongs to the technical field of metal additive manufacturing. The preparation method of the copper-based composite powder comprises the following steps that copper powder is subjected to acid pickling pretreatment, Cu2O-coated Cu powder is prepared through air suspension dynamic etching, the Cu2O-coated Cu powder is purified, and the prepared composite powder is of a core-shell structure and comprises a copper core and a cuprous oxide modified shell wrapping the surface of the copper core; by means of the structure, the absorptivity of the copper powder to near-infrared laser of 1064 nm and the like can be remarkably improved to 30% or above, and therefore the problems that pure copper is poor in melting and multiple in forming defect due to high reflectivity in laser additive manufacturing are effectively solved. The composite powder can be directly used for existing selective laser melting or directional energy deposition equipment, has great significance in achieving high-density copper part forming under medium power, and is convenient to prepare, low in cost and high in practicability.

The invention discloses a brush wire rigidity detection device for an aero-engine brush seal, belongs to the technical field of aero-engine seal part testing devices, and solves the problem of accurate detection of the brush wire rigidity of the brush seal. Comprising a high-precision annular base (with a sliding rail), a three-axis displacement adjustable sliding block assembly and a bimodal displacement monitoring system composed of a high-speed microscopic vision acquisition module and an infrared laser displacement sensing device. A high-pressure sealed cabin is arranged on the periphery of the base, an intelligent pressure applying mechanism based on the cam-sliding block principle is arranged in the center of the base, a servo motor drives a cam disc to convert rotary motion into high-precision radial displacement, and a force sensing module and a safety gap are integrated to form pressure closed-loop control. The sample fixing device is compatible with samples with different diameters through adjustment of an electrodeless light ring, and a high-frequency vibration exciter simulates a working environment. Force is applied through the pressure applying mechanism, displacement is monitored through the bimodal system, and the rigidity of the brush wire is accurately measured.

The invention discloses an inversion method for obtaining an N2O gas volume mixing ratio profile based on a short-wave infrared laser occultation detection technology. The inversion method comprises the following steps: calculating a short-wave infrared atmospheric refractive index profile at the center position of an N2O gas absorption spectral line; calculating a collision parameter profile according to the short-wave infrared atmospheric refractive index profile, respectively calculating atmospheric transmittance profiles of an N2O gas absorption spectral line and a reference spectral line based on normalized energy data of infrared laser occultation detection, and executing Abel integral inverse transformation on a difference value between the atmospheric transmittance profiles to obtain an N2O gas absorption coefficient profile; converting the N2O gas absorption coefficient profile into an N2O gas initial volume mixing ratio profile; and by taking the N2O gas initial volume mixing ratio profile as an initial value, carrying out analog calculation on an atmospheric transmittance profile after N2O gas absorption, constructing a cost function, carrying out iterative optimization, outputting an N2O gas volume mixing ratio profile, and obtaining a final inversion result. According to the method, the inversion precision is improved.

The invention belongs to the technical field of metal-based composite material additive manufacturing, and particularly relates to ultrasonic-assisted green laser equipment for copper-based diamond cooling fin machining, which comprises a rack, a printing cabin, a green laser machining system, an ultrasonic-assisted system, a powder spreading system, a gas control system, an intelligent control system and an online monitoring system. By integrating a green laser processing system and an ultrasonic auxiliary system, an ultrasonic-green laser-powder multi-energy field coupling processing system is constructed, the wavelength of green laser is 532 nm, the absorption rate of copper is increased, and compared with traditional infrared laser, low-power and high-efficiency melting of copper can be achieved, the diamond graphitization risk is reduced from the angle of a heat source, and the production cost is reduced. Ultrasonic vibration is transmitted to a molten pool through a substrate coupling type structure, by means of the cavitation effect and the acoustic streaming effect, the interface wettability of copper and diamond is effectively improved, the interface bonding force is enhanced, the interface thermal resistance is reduced, meanwhile, grains are refined, pores are eliminated, residual stress is reduced, and the comprehensive performance of the cooling fin is remarkably improved.

The invention relates to the technical field of metallurgy preparation of heterogeneous materials, in particular to an efficient laser cladding preparation method of nickel-based superalloy on the surface of copper alloy, which comprises the following steps: increasing the absorptivity of the copper alloy to infrared laser through preheating, and carrying out laser cladding on GH3625 alloy on the surface of Cu-Cr-Zr alloy through regulating and controlling the components of a copper alloy / nickel alloy intermediate layer, so as to prepare the nickel-based superalloy on the surface of Cu-Cr-Zr alloy. And formation of a microstructure in the non-equilibrium solidification process is controlled, the process is optimized, and the mechanical property of the material is improved. According to the method, the intermediate layer is utilized to perform non-equilibrium state metallurgy preparation of the GH3625 alloy on the surface of the Cu-Cr-Zr base material, compared with the method without adding the intermediate layer, after the intermediate layer is added, the content of the copper element in a molten pool is increased, liquid-phase separation is promoted, a large-range Ni-Cr core shell is formed to serve as a low-energy nucleation site, crystal grains are refined, and the performance of the Cu-Cr-Zr alloy is improved. Further, a fine grain strengthening effect is achieved; the thickness of the element diffusion layer is also increased by adding the middle layer, the element uniformity is promoted, the dependence on Malangori is reduced, the heat input is reduced, the optimization of process parameters is realized, and the mechanical property of the heterogeneous material is further improved.

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 discloses an integrated nano platform for bimodal detection and synergistic sterilization of pathogenic bacteria as well as a preparation method and application of the integrated nano platform, and belongs to the technical field of food safety. The platform is composed of a multifunctional nano probe (MPDA / Pd SA-DA-CDs / Apt) and a magnetic separation assembly (MNRs / PGA / AM). The probe integrates enzyme-like catalysis and photo-thermal performance and is used for generating colorimetric and photo-thermal dual-mode signals so as to realize high-sensitivity and high-reliability detection of pathogenic bacteria. The magnetic separation assembly is used for specifically capturing and enriching target bacteria and eliminating matrix interference. After detection is positive, the platform can immediately start secondary propulsion synergistic sterilization: firstly, the action distance is shortened through magnetic aggregation, and then pathogenic bacteria are efficiently inactivated and biological membranes are disintegrated by utilizing the synergistic effect of near-infrared laser excitation photothermal effect and active oxygen. According to the invention, the integration of detection and disinfection is realized, the operation is convenient, and the method has important application value in the fields of food safety and biomedicine.

An apparatus and method directed to sample characterization with an AFM using a pulsed IR laser in force volume mode, i.e., force volume mode combined with AFM-IR, referred to herein as FV AFM-IR. In this way, lateral forces are suppressed during probe positioning, and precise force control allows adjusting the tip-sample interaction force, including keeping the tip-sample interaction force constant or exerting pulling forces. Nano-spectroscopic measurements with sub-20 nm, and even sub-10 nm resolution can be acquired together with nano-mechanical and other property measurements. Notably, probe resonance shifts can be compensated with frequency tracking methods, and signal normalization by the Q-factor can be used to ensure that the extracted light-induced surface pulse force is substantially independent of damping.

The embodiment of the invention provides an infrared touch control device, projection equipment and an infrared touch control method, which are used for solving the technical problem of insufficient convenience of the existing key type interaction mode. The infrared touch device comprises a frame shell, an infrared laser transmitter, an infrared camera and a function processing circuit. According to the infrared touch device, the projector is used for projecting a control menu picture, an invisible infrared light plane is formed through the infrared laser transmitter, the control menu picture and the infrared light plane jointly form a virtualized interaction interface, and then interaction behaviors of a user are sensed in real time through the infrared camera. Therefore, seamless fusion of the interactive behavior and visual feedback of the user is realized, and the instant response touch function provided by the physical touch screen is reproduced by adopting different technical paths, so that the interactive process is simpler, more visual, more natural and more convenient, and the user experience is greatly optimized.

The invention discloses a water-based environment-friendly coating and local printing transfer paper thereof, and particularly relates to the technical field of water-based environment-friendly coatings. The water-based environment-friendly coating is prepared from a water-based epoxy ester dispersion, an organic silicon modified polyvinyl butyral emulsion, a gas-phase method aluminum oxide nano dispersion, a fluorocarbon surfactant, a self-crosslinking polyether thickening agent and a propylene glycol methyl ether acetate-water azeotropic quick-drying auxiliary agent. According to the coating, through cooperation of specific components and process control, the drying speed is remarkably increased, the surface drying time is shortened, meanwhile, shrinkage cavities are eliminated, the hardness of the coating is enhanced, and the edge transfer precision is improved. Corona treatment is adopted for the corresponding local printing transfer paper, gravure precise coating, infrared pre-drying and gradient hot air drying are matched, and finally clear separation and transfer of a coating are achieved through infrared laser scanning. The whole system is a water-based formula, is environment-friendly and safe, is suitable for the field of high-end printing, and has the comprehensive advantages of high drying speed, high precision, strong adhesive force, simplified process and the like.

Disclosed in the present invention is a method for forming a precise through-hole at high speed by using an infrared laser, wherein the method irradiates in turn single modulated Bessel beam onto a workpiece in a scanning fashion by means of a mirror structure with at least one driving unit coupled to form a laser scanning processing pattern that changes the characteristics of the workpiece by precisely micromachining the workpiece into various shapes or sizes at high speed, and then wet-etching the workpiece, such that the method not only enables laser-machining the workpiece at high speed by significantly reducing laser-machining time compared to conventional methods, but also improves productivity by reducing etching time.

A multi-accessory mount assembly for use with a firearm, and methods for coupling the assembly to the firearm are provided. The assembly may include a proximal portion having a lower surface configured to be removably coupled to the firearm and an upper surface configured to be removably coupled to a sub mount. The sub mount may be configured to be removably coupled to a first firearm accessory, e.g., an optic scope, a red dot sight, a reflex sight, a night vision monocular or scope, or a magnifier. The assembly further may include a distal portion extending distally from the proximal portion via a neck portion, such that the distal portion is elevated higher than the proximal portion. An upper surface of the distal portion may be configured to be removably coupled to a second firearm accessory, e.g., an infrared laser or a night vision monocular or scope.

The invention discloses a gas leakage pumping and sampling detection system for a driverless vehicle, and aims to solve the problems that the existing gas leakage detection is strong in manual dependence, insufficient in sensitivity, incapable of all-weather operation and difficult in leakage source positioning. The system comprises five core parts: an unmanned vehicle platform, a configuration laser radar, RTK-GPS integrated navigation, sub-meter positioning realization, a pumping sampling detection module 1653.7 nm near-infrared laser source, a 20m optical path reflection pool, a detection sensitivity of 5ppb, a three-level filtering and three-level damping, a protection level IP67, an environment sensing system, an intelligent inspection control system and a data transmission processing system. The vehicle is provided with a 100 kWh battery, and the endurance exceeds 300 kilometers. According to the system, full-autonomous all-weather inspection is realized, the leakage detection rate is 98.5%, the inspection cost is reduced by more than 60%, early-stage tiny leakage can be accurately identified, and the safety guarantee level of a gas pipe network is remarkably improved.

The invention discloses a laser deicing method and device based on ice layer thickness and surface state recognition, belongs to the technical field of fan blade deicing, and aims to solve the problems of low efficiency, large energy loss and high blade damage risk caused by incapability of accurately sensing the ice layer state in the conventional fan blade laser deicing technology. The system comprises an active sensing module and a laser clearing module. The active sensing module measures the thickness and the surface state of an ice layer through infrared laser, and performs multi-dimensional monitoring in combination with a laser radar, a camera and a thermal infrared imager. And the laser clearing module dynamically adjusts laser parameters for deicing according to the sensing result. According to the invention, a non-contact ice thickness measurement method based on infrared laser and a surface state identification method based on relative illumination intensity are created for the first time, and accurate sensing of the ice layer state is realized. A laser and a power supply are fully integrated in the unmanned aerial vehicle, the constraint of a ground platform and optical fibers is eliminated, and the deicing task of the fan blade is accurately completed.

The invention discloses a machining method for multi-stage laser composite modified auxiliary grinding, and belongs to the technical field of material machining. According to the method, a multi-step synergistic process of ultraviolet activation (cleaning / absorption increasing), infrared-induced loosening (oxidation channel construction / surface macroscopic removal difficulty reduction) and ultraviolet amorphous oxidation (brittle-plastic transition promotion / subsurface layer heat affected zone repair) is adopted, and selective ablation of infrared laser and photochemical action of ultraviolet laser are synergistically complemented; a composite modified layer which is composed of a porous deformation layer and an amorphous oxide layer and has a small subsurface layer heat affected zone is constructed on the surface of the fiber reinforced ceramic matrix composite material, and the modified layer has the three functions of being loose and easy to remove, promoting abrasive dust to be discharged and visualizing a thickness scale, so that follow-up fine grinding machining is guided and optimized, and the service life of the fiber reinforced ceramic matrix composite material is prolonged. And finally, high-efficiency, high-quality and low-damage surface precision machining of the material is achieved.

The invention relates to the technical field of medical apparatus and instruments, and discloses an ultra-pulse thulium fiber laser therapy apparatus, which comprises a laser, a coupler, a lithotripsy energy transmission optical fiber, a thulium fiber laser head, an electrical device, a mainboard, an air cooling device and an equipment case, the laser is of an all-fiber structure and outputs 1940-nanometer near-infrared laser, the 1940-nanometer near-infrared laser is transmitted to the thulium fiber laser head through the thulium-doped double-clad fiber, and a collimating lens set is arranged at the light emitting end of the laser head and used for shaping the laser into collimated light beams. An aspheric focusing lens and an optical fiber clamping mechanism are arranged in the coupler, and the coupler is used for focusing the collimated light beam into the lithotripsy energy transmission optical fiber; the lithotripsy energy transmission optical fiber is a multimode quartz optical fiber, the end face is polished and plated with an anti-reflection film, one end is connected with the coupler through an FC / APC interface, and the other end is connected with an external replaceable treatment handle; and the electrical device is electrically connected with the mainboard. According to the invention, efficient and intelligent heat dissipation management is realized, and the energy transmission efficiency and the output stability are improved.

A signal filtering and concentration inversion method for infrared laser detection, implemented through a signal filtering and concentration inversion system for infrared laser detection, includes the following steps: S1, building a transmissive-type infrared laser gas detection system at an on-site detection location, setting fixed parameter information, and establishing normal communication on an optical detection part and obtaining a first-harmonic signal; S2, performing amplification-processing on the first-harmonic signal to obtain a second-harmonic signal, and introducing the second-harmonic signal into a laser filtering-processing model to obtain a denoised second-harmonic signal; S3, inputting the first-harmonic signal and the denoised second-harmonic signal into a concentration inversion model to obtain a concentration signal of a to-be-detected gas; and S4, determining, based on the concentration signal of the to-be-detected gas, whether a hazardous gas limit has been exceeded at the on-site detection location.

The invention discloses a bridge risk degree detection method and system, and belongs to the technical field of risk detection, and the method specifically comprises the steps: adjusting the emission parameter of an infrared laser emitter or the receiving threshold value of an infrared laser receiver through employing a multi-layer stacked decision tree based on environment data and historical infrared laser signals, the multi-layer stacked decision-making tree is constructed through an environment adaptation layer decision-making tree, a structure state correction layer decision-making tree and a feedback tuning layer decision-making tree; acquiring an infrared laser signal in the adjusted infrared laser path in real time; the collected infrared laser signals are processed, the displacement distance of the bridge in the monitoring direction is calculated according to the processing result, and the processing is that an abnormal time window sequence is input into a machine learning model for abnormal classification judgment; based on the displacement distance, risk level judgment is conducted on the bridge structure state, the method is easy and convenient to arrange, the capacity of adapting to the complex environment is high, the monitoring precision is high, and the accuracy of bridge structure safety monitoring is remarkably improved.

The present invention relates to the field of diameter measurement, and in particular to an infrared laser diameter detection device and a detection method for a wire rope, comprising a mounting seat, on which is connected a measuring component for measuring the diameter of the wire rope; the present invention realizes support and limitation of the wire rope to be measured through the cooperation between two mounting ring plates and corresponding limiting rollers limited on the two mounting ring plates, and then realizes the effect of non-contact measurement of the diameter of the wire rope through the cooperation of a laser emitting end and a laser receiving end correspondingly connected to the two mounting ring plates. At the same time, through the cooperation of the limiting roller and the buffer spring, the friction and vibration during the relative sliding of the wire rope and the shell are effectively reduced, thereby improving the measurement accuracy.

The invention belongs to the technical field of flexible electronics and sensing, and relates to a stepped multi-mode flexible sensor based on laser-induced graphene and a preparation method of the stepped multi-mode flexible sensor. The sensor comprises a humidity sensitive layer, a pressure sensitive layer, a strain sensitive layer and a temperature sensitive layer which are sequentially stacked in a stepped mode from top to bottom, each sensitive layer comprises a flexible substrate, a laser-induced graphene (LIG) electrode and a connecting area penetrating through the flexible substrate, and the sensitive layers are connected in series through the connecting areas. Through an infrared laser processing method, all the sensitive layers are broken through, all the sensing sensitive layers are communicated, and assembling is carried out. And independent sensing of each physical quantity is realized by leading out a corresponding port on each sensing sensitive layer. According to the stepped structure, spatial isolation is carried out through the flexible substrate, signal crosstalk is reduced, low-cost and high-precision manufacturing is achieved in combination with the laser direct writing process, and the stepped structure is suitable for the fields of medical health monitoring, industrial equipment diagnosis, intelligent robots and the like.

The invention discloses an automatic welding process combining laser scanning with visual inspection. The process specifically comprises four working procedures of laser scanning before welding, automatic wire feeding, automatic welding and online tracking detection in welding. The specific implementation effects of each process are as follows: the pre-welding laser line scanner scans a weldment by emitting a laser beam to extract three-dimensional information of the weldment, so that a welding route is conveniently planned, and a walking route is fed back to the control cabinet; the control system can receive an instruction to control the driving system to carry out an automatic welding process, so that the welding gun reaches a specified position to carry out automatic welding; in the welding process, the infrared laser tracker dynamically tracks the welding gun, corrects the walking route and guides the compound eye camera to conduct visual inspection so as to judge the welding quality, and the machining targets that components at the welding seam connecting position are uniform, and the welding seam surface is high in quality and low in defect are achieved.

The application provides a high-sensitivity multi-gas real-time monitoring device and method, which comprises a controller, wherein the controller is connected with a main control circuit; the main control circuit is connected with an indicating laser and a mid-infrared laser array; the indicating laser and the mid-infrared laser array are connected with a multi-pass gas cell through a fiber coupling structure; a photoelectric detector is arranged on the light outlet side of the multi-pass gas cell; and the photoelectric detector is connected with the main control circuit; the controller generates modulation signals with different frequencies to modulate the mid-infrared laser array; the indicating laser emitted by the indicating laser and the mid-infrared laser emitted by the mid-infrared laser array are coupled into a coaxial light beam through the fiber coupling structure and enter the multi-pass gas cell; the photoelectric detector collects signals with target gas information passing through the multi-pass gas cell and simultaneously analyzes the concentrations of multiple target gases through a signal conditioning algorithm. The application has the characteristics of high sensitivity, low detection limit, real-time monitoring, convenient installation, strong anti-interference ability, maintenance-free and wide application range.

The present application relates to the technical field of wood processing, and discloses a high-precision cutting process for woodworking machinery based on laser positioning, comprising the following steps: S1, scanning the surface of wood by a laser sensor to obtain wood data, S2, combining visible light laser and infrared laser, S3, analyzing the characteristics of wood by using an AI algorithm, S4, dynamic compensation of laser error, S5, multi-process collaborative cutting, S6, cooling and heat prevention technology, S7, intelligent environment regulation: real-time monitoring of factory environment parameters to automatically adjust the working state of the laser cutting system, S8, adaptive laser focal length adjustment, S9, adopting an automatic feedback mechanism to record errors in each cutting process in real time. By adopting dual-spectrum laser fusion ranging technology, combining visible light and infrared laser, precise ranging of different wood materials and surface conditions is realized, and the ranging effect is more adaptive and less error, thereby improving the cutting positioning precision.

The invention provides a recovery method of a silicon-based gallium nitride wafer, and relates to the technical field of semiconductor manufacturing, the recovery method aims at the silicon-based gallium nitride wafer comprising a silicon substrate and a gallium nitride-based epitaxial layer arranged on the silicon substrate, and the recovery method comprises the following steps: using an infrared laser beam to scan the silicon-based gallium nitride wafer through a preset laser scanning path strategy; incident light enters the silicon-based gallium nitride wafer from one side of the gallium nitride-based epitaxial layer, so that the gallium nitride-based epitaxial layer is separated from the silicon substrate; and stripping the gallium nitride-based epitaxial layer. And by utilizing the characteristic difference that the gallium nitride-based epitaxial layer is transparent to infrared laser and the silicon substrate strongly absorbs the infrared laser, laser energy accurately acts on the interface of the gallium nitride-based epitaxial layer and the silicon substrate, so that high-efficiency and low-damage separation is realized. The defects that a traditional etching technology is high in cost and heavy in pollution and the substrate is prone to being damaged are overcome, and a brand-new and effective technical path is provided for low-cost and green recovery of the silicon substrate.

The invention discloses a tapping and drilling integrated intelligent numerical control lathe, and relates to the technical field of numerical control lathes, the tapping and drilling integrated intelligent numerical control lathe comprises a machine shell, a first servo motor and a threaded rod, a sliding groove is formed in the lower portion of the interior of the machine shell, the U-shaped plate is fixed to the bottom end of the interior of the machine shell, the first servo motor is fixed to the bottom end of the interior of the machine shell, and the threaded rod is fixed to the bottom end of the interior of the machine shell. The threaded rod is rotatably installed on the left side and the right side of the inner wall of the U-shaped plate in a penetrating mode, the left end of the threaded rod is fixedly connected with the right end of a rotating shaft of the first servo motor, a non-self-locking type threaded groove is formed in the outer wall of the threaded rod, and an inner screw pipe is engaged with the outer wall of the threaded groove of the threaded rod and is slidably installed in the inner wall of a sliding groove of the machine shell; according to the device, the drilling position is pre-positioned through infrared laser by means of the tapping drill bit, and therefore the problem that workpieces are unqualified due to the fact that the tapping drilling position deviates is avoided.

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.

The invention provides a self-assembled single-path ultrahigh vacuum low background infrared laser sample cavity window, and relates to the technical field of infrared laser sample detection. The self-assembled single-path ultrahigh-vacuum low-background infrared laser sample cavity window comprises a base, a sample cavity is arranged in the base, a connecting block is arranged on the outer side wall of the base, an exhaust pipe is fixedly connected into the connecting block, and an exhaust hole communicated with the exhaust pipe is formed in the bottom of the sample cavity; a connecting flange is arranged above the base, and a sealing upper cover is arranged above the connecting flange. In the sealing process of the light-transmitting wafer, the first soft metal sealing ring and the second soft metal sealing ring are arranged on the upper side and the lower side of the light-transmitting wafer respectively, plastic deformation can be achieved, the light-transmitting wafer is matched for sealing, and meanwhile the situation that the light-transmitting wafer is broken in the heating or cooling process can be avoided.

The utility model discloses a laser scribing device which comprises a working table, a support installed on the working table, an infrared laser assembly and a green laser assembly which can be independently in sliding fit with the support, and a carrying table in sliding fit with the working table. Wherein the sliding directions of the infrared laser assembly and the green laser assembly are perpendicular to the working surface of the carrying table, and the infrared laser assembly and the green laser assembly are used for adjusting the position of a focal plane; the carrying table is used for carrying a product and can be controlled to move to the position matched with the output end of the infrared laser assembly or the output end of the green laser assembly. When the laser scribing equipment is used, the infrared laser assembly and the green laser assembly are independently controlled to move along the working surface perpendicular to the carrying table, and the focal plane positions of the corresponding assemblies can be accurately adjusted, so that operation steps can be simplified, and four laser scribing procedures of P1, P2, P3 and P4 of solar cells can be efficiently completed in a matched mode.