1694 results about "Femtosecond" patented technology

The invention belongs to the technical field of crystal processing, and relates to a method for obtaining a single crystal diamond (111) surface wafer by using double-pulse-width laser. Femtosecond laser and picosecond laser are adopted for machining and stripping the blocky single crystal diamond to obtain a first crystal face (111), then femtosecond laser and picosecond laser are continuously adopted for machining and stripping the remaining blocky single crystal diamond, and the blocky single crystal diamond is obtained; the process for obtaining the crystal face (111) comprises the following steps of: scanning femtosecond laser on the crystal face (111) to process a plurality of graphitization modification lines which are full of the crystal face (111) and are parallel to each other, wherein the graphitization modification lines are parallel to the crystal orientation of a diagonal line [110] of the crystal face (001); carrying out scanning processing along the graphitization modification line by utilizing picosecond laser, so as to form a leap crack on the basis of the graphitization modification line of the crystal face (111); and then stripping is carried out. By means of the method, the wafer with the complete (111) face can be obtained through cutting in the ultra-thick (001) CVD monocrystal diamond.

The invention relates to the technical field of laser processing, and discloses a laser processing device and method suitable for TGV forming, and the method comprises the steps: S1, a glass substrate is scanned in a confocal manner, a three-dimensional topological graph is obtained, and the three-dimensional topological graph comprises the three-dimensional coordinate, the thickness gradient and the positioning mark of the glass substrate; s2, based on the three-dimensional topological graph, a through hole body is formed through ultraviolet femtosecond laser etching, and intermediate infrared laser is synchronously and dynamically controlled to etch the side wall of the through hole body to generate a taper through hole with a preset taper angle; and S3, the incident angle of the ultraviolet femtosecond laser is adjusted on the side wall of the taper through hole according to the three-dimensional topological graph, and a plurality of heat dissipation grooves are etched through the ultraviolet femtosecond laser. According to the laser processing device and method suitable for TGV forming, signal integrity optimization and active heat dissipation functions are achieved in the same through hole, the application range of the TGV is widened, and the stability of the TGV during use is improved.

The invention provides a super lens and a femtosecond laser manufacturing real-time monitoring system applying the super lens, the super lens comprises a substrate and a nano column array on the substrate, nano columns at different positions in the nano column array independently regulate and control a first wavelength light wave and a second wavelength light wave, so that the first wavelength light wave satisfies first phase distribution, and the second wavelength light wave satisfies second phase distribution. The second wavelength light wave meets the second phase distribution, so that the super lens not only can focus the first wavelength light wave and the second wavelength light wave on the same plane, but also can control the focal depth of the first wavelength light wave to be greater than the focal depth of the second wavelength light wave, so that the requirement of a femtosecond laser manufacturing real-time monitoring system is met; not only can the anti-interference capability in the machining process be improved, but also the axial position monitoring precision can be improved.

The invention relates to a gradient diameter microchannel plate and a preparation method and application thereof. The preparation method comprises the following steps: preparing a transparent material into a sheet-shaped substrate; the method comprises the following steps: processing conical array micropores in a substrate by using femtosecond laser to obtain a gradient-diameter substrate; when the conical array micropores are processed, the inlet end is firstly etched to form an opening, then the diameter is gradually and uniformly reduced to the outlet end, and the diameter of the inlet end is greater than that of the outlet end; the ratio of the hole depth of the conical array micropores to the diameter of the outlet end is 30-200, and the taper angle is 1-5 degrees; preparing AlO-SiO-BOsol containing Cs, uniformly coating the AlO-SiO-BOsol on the inner walls of the conical array micropores, and then carrying out hydrogen reduction to obtain a microchannel blank plate; and plating electrodes at the two ends of the micro-channel blank plate to obtain the gradient-diameter micro-channel plate. The gradient diameter microchannel plate provided by the invention has the advantages of high gain and low noise, and is more practical.

The invention relates to a terahertz-Raman integrated detection system and method. The detection system comprises a fusion mainframe box and an integrated probe arranged at a sample detection end on the fusion mainframe box, a Raman spectrum module, a terahertz spectrum module, a terahertz optical module and a data analysis module are arranged in the fusion mainframe box; the Raman spectrum module is composed of a Raman laser, a Raman light filter, a Raman grating and a Raman detector which are sequentially connected through a light path; the terahertz spectrum module is composed of a terahertz femtosecond laser, a transmitting photoconductive antenna, a receiving photoconductive antenna and a terahertz detector which are sequentially connected through a light path; the data analysis module is in communication connection with the Raman detector and the terahertz detector and is used for synchronously processing data transmitted by the Raman detector and the terahertz detector. Compared with the prior art, the integrated probe synchronously collects two kinds of spectral data and carries out fusion processing on the two kinds of spectral data through the data analysis module, and the device has the remarkable effects that the device integration degree is high, the detection efficiency and accuracy are greatly improved, and the application range is wide.

The invention discloses a speed measurement method based on single-frame multiple exposure, and belongs to the field of hypersonic velocity field measurement. The implementation method comprises the following steps: recording equal time interval change of molecular marking in a flow field along with movement of the flow field through single-frame multi-time exposure imaging of an image enhancement camera, and realizing continuous and rapid acquisition of speed information within a short time after single-time marking. The morphological position after the time interval is determined according to the molecular marker, and the velocity field with spatial resolution in the flow field is extracted by mapping the marker before and after displacement, so that the velocity measurement precision is improved. Compared with other two-dimensional velocity field acquisition methods based on femtosecond laser molecular marker tracing velocity measurement, the method provided by the invention does not need a complex focusing lens combination, can obtain spatial positions of molecular markers at different moments only through isochronous continuous triggering exposure of a camera, thereby obtaining velocity flow field displacement information. And corresponding acceleration information can be further deduced according to the obtained velocity field. The method is especially suitable for hypersonic velocity field measurement.

The invention discloses a PCB blind hole machining method and device, laser drilling equipment and a storage medium, the laser drilling equipment comprises a picosecond or femtosecond laser device and a CO2 laser device, after a first machining parameter of the picosecond or femtosecond laser device and a second machining parameter of the CO2 laser device are determined, on one hand, the first machining parameter of the picosecond or femtosecond laser device and the second machining parameter of the CO2 laser device are determined; the picosecond or femtosecond laser performs cold machining on the surface copper layer to form the annular heat insulation groove, the surface copper layer can be prevented from generating suspended copper at the opening of the blind hole, on the other hand, heat generated when the CO2 laser machines the blind hole can be prevented from being diffused to the opening of the blind hole in the surface copper layer through the annular heat insulation groove, suspended copper is further prevented from being generated, and on the other hand, the heat dissipation efficiency is improved. The picosecond or femtosecond laser device with low processing efficiency is adopted for annularly cutting the annular heat insulation groove in the surface copper layer, then the CO2 laser device with high processing efficiency is used for removing materials in the area in the outer contour of the annular heat insulation groove to achieve drilling, the processing efficiency of the two laser devices with different processing efficiency is considered, and the laser drilling efficiency is improved.

The invention discloses an error compensation correction method for a femtosecond laser galvanometer 4F machining system, and belongs to the technical field of high-precision machining. Leveling the processing system; processing and characterization of the square block are calibrated; deflection correction of a scanning galvanometer of the femtosecond laser processing system and deflection correction of a scanning plane of the scanning galvanometer of the femtosecond laser processing system; according to the method, the length and width data of the calibration square block are collected, pre-compensation operation is carried out on an original structure machining file, and the size error of a machining structure caused by deflection of laser through a scanning galvanometer reflector is eliminated; by collecting the angle difference value of the scanning plane of the scanning galvanometer control laser and the plane of the substrate, plane deflection correction operation is carried out on an original structure processing file, the problem that the scanning plane does not coincide with the plane of the substrate is solved, and the consistency of all areas of a scanning structure is extremely high; the preparation of a high-precision and large-size true three-dimensional structure can be realized through the galvanometer-based femtosecond laser two-photon polymerization processing system, and the processing capability of the galvanometer-based femtosecond laser processing system is successfully optimized; the method has the outstanding advantages of being universal, high in operability and wide in applicability.

The invention relates to a laser processing method for a coated armor structure of wear-resistant super-hydrophobic aluminum bronze, which comprises the following steps of: preparing an aluminum bronze workpiece, polishing and cleaning, depositing a ceramic wear-resistant film on the surface of the workpiece by adopting pulse laser, and etching the ceramic wear-resistant film by adopting femtosecond laser, so as to obtain a coated armor structure of the wear-resistant super-hydrophobic aluminum bronze. And then chemical modification of the wear-resistant armor structure is completed through heat treatment, chemical modification of the micro-nano surface structure is completed, and the wear-resistant super-hydrophobic aluminum bronze is obtained. The wear-resistant ceramic film and the wear-resistant armor structure can resist wear together, double guarantee is provided for the internal hydrophobic microstructure, the super-hydrophobic wear resistance of the surface of a component in underwater equipment can be improved, the service life of the component can be prolonged, and the problem of marine organism corrosion is solved.

The invention discloses a high-frequency hydroxyl marking speed measurement device and method, and relates to the technical field of flow field non-contact measurement, and the device comprises an ultraviolet femtosecond laser, two shaping units, a first laser, a camera, a time schedule controller, and a computer. The ultraviolet femtosecond laser is used for outputting ultraviolet femtosecond laser, shaping the ultraviolet femtosecond laser into filamentous laser through the first shaping unit, and injecting the filamentous laser into a flow field measurement area to generate labeled molecules; the first laser is used for outputting first laser, shaping the first laser into sheet laser through the second shaping unit, and injecting the sheet laser into a flow field measurement area to generate labeled molecular fluorescence; the camera is used for collecting labeled molecule fluorescence images to obtain spatio-temporal data; the time sequence controller controls the time sequence of each component of the device; processing spatio-temporal data of labeled molecular fluorescence by a computer to obtain a flow field velocity; the ultraviolet femtosecond laser with high instantaneous energy density is selected as the write-in laser, the repetition frequency of each part is improved, and the problems that conventional hydroxyl marking speed measurement depends on the high-temperature condition of a to-be-measured flow field environment and the repetition frequency is low are solved.

The invention discloses a liquid crystal display screen bright and dark line adjustment optimization method and system and a display screen, and relates to the technical field of liquid crystal display screens, and the method comprises the following steps: constructing a femtosecond resolution synchronous sampling matrix, employing a photoelectric hybrid probe to carry out in-phase collection on driving voltage rising edges of a plurality of sub-channels of the liquid crystal display screen, generating an original waveform database of the multi-channel driving voltage; based on an original waveform database, quantum dot calibration pulses with time marks are injected into all the sub-channels, phase deviation sequences among all the sub-channels are analyzed and extracted through timestamp linkage, and a cross-channel synchronization deviation reference baseline is established. By means of high-precision sampling and difference frequency regulation and control, approximate synchronization of multi-channel driving voltage of the liquid crystal display screen is achieved, accurate recognition is achieved, phase deviation is dynamically corrected, abnormal display phenomena such as frame skipping, ghost shadows and color cast are remarkably eliminated, and visual consistency and display stability in a high-dynamic scene are improved.

The invention discloses a plasma surface activation pre-bonding-femtosecond laser connection integrated process, belongs to the technical field of advanced dissimilar material precision connection, and particularly relates to a multi-material interface efficient connection method based on plasma surface activation pre-bonding and femtosecond laser processing. The method is suitable for high-strength and low-thermal-damage heterogeneous bonding of transparent materials (such as glass, quartz and sapphire) and transparent materials or metal materials (such as titanium alloy, stainless steel and invar alloy). According to the method, interface atomic-scale cleaning and chemical activity regulation and control are achieved through plasma activation, interface connection of the two materials is induced by combining the femtosecond laser ultrafast nonlinear effect, and the bottlenecks that in a traditional connection technology, optical contact depends on a mechanical clamp, and heat input is uncontrollable are broken through; and an innovative solution is provided for cross-material interface functional manufacturing in the fields of photoelectric device packaging, optical-electronic integrated systems and the like.

The invention relates to a data acquisition and analysis system and method for laser interference measurement, and aims to solve the problem of limited measurement precision caused by asynchronous signal acquisition, imperfect environmental interference compensation and algorithm errors of the existing system. The system comprises a photoelectric conversion unit, a signal conditioning unit, a high-speed synchronous acquisition unit, a real-time processing unit and an error compensation module. The photoelectric conversion unit adopts a four-quadrant PIN photodiode array to receive interference light signals and convert the interference light signals into analog electric signals; the signal conditioning unit performs gain adjustment and bandwidth limitation on the signal; the high-speed synchronous acquisition unit realizes femtosecond-level synchronous acquisition of signals; the real-time processing unit performs phase solution and eliminates harmonic errors based on an improved arc tangent algorithm; and the error compensation module fuses temperature sensor data and accelerometer data to realize thermal drift and vibration compensation.

The invention belongs to the technical field of optics, and particularly relates to a terahertz radiation source system of an air plasma antenna, which comprises a laser, an air plasma generation unit, a terahertz radiation generation unit, a terahertz waveguide and transmission system, a detection analysis unit and a control synchronization system, the laser device is a high-power femtosecond laser device and is used for generating ultra-short pulse laser, the pulses can excite plasma in the air, and the problem that a traditional photoconductive antenna terahertz source is low in terahertz radiation intensity due to limitation of a material damage threshold value is solved; the bandwidth of terahertz radiation can be regulated and controlled by adjusting the distance between the plasma antennas, and the interval time of switching on the plasma antennas can be controlled by controlling the delay time of the third beam of laser, so that the regulation and control of the terahertz wave intensity are realized.

The invention relates to a water electrolysis hydrogen production technology, and aims to provide a super-hydrophilic nickel-based electrode with a two-stage array structure and a preparation method of the super-hydrophilic nickel-based electrode. According to the nickel-based electrode, a three-dimensional net-shaped nickel felt made of micron-sized pure nickel fibers serves as a base material, and micron-sized second-stage array structures are periodically arranged on the first-stage surface of the nickel felt; the secondary array structure is any one or two of a ridge-shaped array or a square column array formed on the surface of the nickel felt by using a femtosecond laser etching process. The preparation method of the electrode is simple in preparation step, has super-hydrophilic and super-aerophobic characteristics, is excellent in electrochemical performance and low in cost, and is very suitable for industrial production and application; a femtosecond laser one-step method is used for processing, subsequent treatment is not needed, and the method is simple, easy to operate and suitable for being amplified to an industrial production scale; the surface wettability of the electrode is greatly enhanced, the hydrophilic and aerophobic properties are excellent, and water transmission and bubble desorption in the electrolysis process are facilitated.

The invention discloses a sapphire substrate through hole, a superconducting quantum chip manufacturing method and a superconducting quantum chip. The sapphire substrate through hole manufacturing method comprises the following steps: cleaning and drying a sapphire substrate; the cleaned and dried sapphire substrate is fixed to a three-dimensional positioning platform, and the three-dimensional positioning platform is used for moving the sapphire substrate according to a preset machining position so as to achieve relative machining Bessel beam nanoscale displacement; a femtosecond laser light source system emits a Bessel beam according to preset laser process parameters, the Bessel beam is focused to at least one position of a to-be-machined through hole of a sapphire substrate according to a preset laser scanning path, and through hole machining is conducted on the at least one position. According to the invention, the problem that the through hole is difficult to be formed in the sapphire substrate is solved, the high-quality requirement of the through hole in the sapphire substrate in the superconducting quantum chip is met, and a solution is provided for the realization of large-scale expansion of superconducting quantum bits in the future.

The invention discloses a time domain compression femtosecond holographic microscopy reconstruction method based on spatial domain and frequency domain joint learning. Constructing a time domain compression femtosecond holographic microscopy system for carrying out multi-moment information time domain compression coding on a measured sample and generating a single-frame snapshot measurement graph; constructing a joint spatial domain-frequency domain learning end-to-end reconstruction model comprising a spatial frequency domain interaction module; training the model by taking a dynamic micro-nano structure hologram sequence generated by simulation as a training set until the joint spatial frequency domain loss function is converged; inputting a single-frame snapshot measurement image generated by a microscopic system into the model for processing to obtain a reconstructed hologram frame sequence; and performing frequency spectrum extraction and phase unwrapping processing to generate a dynamic three-dimensional scene video so as to realize time domain compression femtosecond holographic microscopy reconstruction. According to the invention, both the hardware imaging rate and the algorithm reconstruction precision are considered, and high-speed, high-resolution and low-cost four-dimensional holographic microscopic imaging can be realized under the conditions of extremely low data bandwidth and a common CMOS camera.

The invention relates to an FPGA-based GPR ground penetrating radar electromagnetic signal synchronous high-speed data acquisition system and method. The system comprises a front-end signal processing module, a high-speed ADC sampling module, a clock synchronization control module, an FPGA real-time processing module, a target detection and feature extraction module, a mechanism data storage module and a remote data transmission module. On the engineering safety level, the service life of equipment in a strong electromagnetic environment is prolonged by three times through the multi-stage protection design, and the annual failure rate is reduced to 0.1% or below; an ultra-high-speed sampling system (83.2 GS / s) is combined with femtosecond-level clock synchronization, so that 0.5 mm-level thin-layer structure recognition becomes possible, and a technical foundation is provided for geological disaster early warning; a pioneering photoelectric double-channel transmission mechanism is adopted, the electromagnetic interference suppression is improved by 12dB while the 1ps synchronization precision is kept, and the traditional contradiction between high-speed sampling and signal fidelity is broken.

The invention discloses a double-pulse system and method for improving depth resolution of laser ionization mass spectrometry, and relates to the technical field of mass spectrometers, the system comprises a control system for controlling femtosecond laser parameters generated by a femtosecond laser and nanosecond laser parameters of a nanosecond laser; the laser energy regulation and control module is used for carrying out phase adjustment and detection on the input femtosecond laser and outputting the femtosecond laser meeting set parameters based on the femtosecond laser parameters; the light beam shaping and light beam morphology analysis module is used for shaping femtosecond laser and focusing the femtosecond laser on the surface of the sample for laser denudation; the nanosecond laser performs off-resonance multi-photon ionization on the denudated neutral particles to generate ionized ions for mass spectrometry. According to the invention, the depth resolution of the laser ionization mass spectrum can be improved to nanoscale, the ionization efficiency of ions is improved under the condition of reducing the sampling amount, and meanwhile, the sensitivity of an instrument and the accuracy of quantitative analysis are improved.

The invention belongs to the technical field of nickel-based single-crystal superalloy materials, and provides a nickel-based single-crystal superalloy and a strengthening method thereof, and the method comprises the following steps: cleaning and drying the nickel-based single-crystal superalloy to be strengthened; strengthening parameters and a shock strengthening path are set, and the nickel-based single crystal high-temperature alloy is subjected to absorption-layer-free laser shock strengthening; the strengthened nickel-based single crystal high-temperature alloy is cleaned and dried; polishing parameters and a polishing path are set, femtosecond laser oblique incidence polishing is conducted on the strengthened area of the nickel-based single crystal superalloy, and surface ablation is removed; the polished nickel-based single crystal high-temperature alloy is cleaned and dried; according to the method, the nickel-based single crystal superalloy is strengthened by adopting an absorption-layer-free laser shock strengthening mode, and femtosecond laser oblique incidence polishing is adopted, so that the procedures of pasting and removing an absorption layer for multiple times are avoided, the processing efficiency of laser shock strengthening is improved, and deterioration of the surface quality of a material caused by laser ablation is avoided.

The invention relates to the technical field of machining path planning, in particular to a graphite micropore femtosecond laser machining path planning method based on AI visual localization, which comprises the following steps: S1, acquiring an image of the surface of a graphite workpiece through an industrial camera, and preprocessing the image; s2, processing the image based on an AI visual identification model, and extracting microscopic features of the graphite surface and position coordinates of a preset processing area; s3, based on the extracted feature coordinates and preset micropore design parameters, an initial path of femtosecond laser processing is generated through a path optimization algorithm; and S4, the optimized machining path is converted into a laser galvanometer control instruction, and femtosecond laser is driven to complete micropore machining. According to the method, on the basis of path optimization of the improved grey wolf algorithm, through dynamic weight adjustment, in a multi-taboo area scene, the idle running time of the laser galvanometer is effectively shortened, and the machining efficiency is improved.

The invention discloses a micro porous carbon spring based on femtosecond laser micro-nano machining and a preparation method thereof, and relates to the technical field of femtosecond laser micro-nano machining. The invention provides a preparation method of a micro porous carbon spring, which comprises the following steps: taking a polyimide film, fixing the polyimide film on a slide, and fixing the slide on an objective table; laser parameters are debugged, laser beams are focused on the surface of the polyimide film for scanning, and the micro porous carbon spring is obtained; the laser parameters are as follows: the laser power is 500-4000 mW, and the scanning speed is 1-10 mm / s. The invention further provides a corresponding micro-nano machining system and a micro-nano machining parameter database. The micro porous carbon spring prepared by the method has good conductivity, mechanical strength and environmental stability.

The invention relates to the technical field of laser micropore processing, and discloses a device for processing a blade film hole by femtosecond laser, which sequentially comprises an infrared femtosecond laser for emitting laser, a blade hole forming device for guiding light and processing laser beams and a blade fixing device for fixing a blade to be processed along a beam transmission path, the blade hole forming device comprises a laser incidence port, a compact scanning galvanometer system for adjusting a laser scanning path, a rotating assembly capable of rotating around an optical axis and used for adjusting the emitting angle of a laser beam, a focusing system for adjusting laser focusing, a light guide assembly for adjusting light beam incidence and a light guide reflection assembly. The lower end of the scanning galvanometer system is connected with the upper end of the rotating assembly, the upper end of the focusing system is connected with the lower end of the rotating assembly, the lower end of the focusing system is connected with the upper end of the light guide assembly, and the lower end of the light guide assembly is connected with the light guide reflection assembly. And the infrared femtosecond laser, the compact scanning galvanometer system and the focusing system are all controlled by the control system. According to the system, blade film hole machining in a complex track can be achieved.

The invention relates to a silicon carbide femtosecond laser processing process simulation and morphology evolution prediction method, a medium and electronic equipment, and the method specifically comprises the steps: constructing a silicon carbide model, and carrying out discretization processing to obtain a silicon carbide grid model; fluid heat transfer parameters and fluid flow parameters are calculated; constructing a femtosecond laser heat source model; introducing the femtosecond laser heat source model into the double-temperature model and correcting the femtosecond laser heat source model; based on fluid heat transfer parameters and fluid flow parameters, coupling the corrected dual-temperature model with a Navier-Stokes model, and constructing a multi-physical field model; an ablation threshold value is set, and when laser energy reaches or exceeds the ablation threshold value, the grid deforms; calculating the grid deformation speed of the silicon carbide phase explosion; and simulating the removal process of the material according to whether the grid is deformed or not and the deformation speed thereof. According to the method, the multi-physical field model is constructed, so that the process of femtosecond laser processing of silicon carbide can be simulated more accurately, the actual processing condition is reflected, and the prediction accuracy of the processing process is improved.

The invention discloses a multi-mode feedback control method and system for a femtosecond laser stone crusher, and relates to the technical field of medical instruments. The method comprises the following steps: constructing spectral component analysis, collecting spectral signals, and executing target chemical component identification; ultrasonic position detection: acquiring an ultrasonic echo signal through a transducer, and calculating a spatial distance; performing vision-assisted positioning, acquiring image data through an endoscope, and generating space image information; according to the spectrum identification result, the distance parameter and the space image information, multi-source data synchronization processing is completed; generating a laser parameter control instruction according to the fusion result; and executing a real-time feedback regulation and control process, obtaining feedback information, and completing control parameter updating and closed-loop response. Through fusion of multi-modal information such as spectrum identification, ultrasonic distance measurement and visual navigation, real-time identification of stone types, intelligent matching of laser parameters and accurate control of spatial positioning are realized, and the accuracy, safety and intuition of lithotripsy operation are remarkably improved.

The invention provides a transparent electromagnetic shielding metal copper mesh and a preparation method and application thereof. The preparation method of the transparent electromagnetic shielding metal copper mesh comprises the steps that an electromagnetic shielding substrate is coated with an ink layer, then the ink layer is converted into a patterned metal copper mesh to be deposited on the surface of the electromagnetic shielding substrate through a femtosecond laser reduction direct writing method, and finally ink which is not converted into the metal mesh is cleaned through cleaning liquid. Obtaining a transparent electromagnetic shielding metal copper mesh; the ink is prepared from copper salt, water, reductive low-carbon alcohol and a nano material, and the nano material comprises at least one of a high-conductivity nano material and a high-permeability nano material. According to the method, the transparent electromagnetic shielding metal copper mesh is prepared through femtosecond laser reduction direct writing, by adjusting the line width and the period of the metal copper mesh, the shielding effectiveness is effectively improved under the condition that the high light transmittance of an electromagnetic shielding material is guaranteed, the technological method is simple and feasible, and high-efficiency and low-cost manufacturing of the transparent electromagnetic shielding metal copper mesh is achieved.

The invention discloses a color-permeable colorful ceramic and a preparation process thereof, and belongs to the technical field of ceramic preparation processes, a transparent AlON ceramic body is formed by low-temperature diffusion bonding sintering, an adjustable structural color of 480-630 nm is realized through TiO2 / ZrO2 nanocrystalline spacing (180-220 nm), a Sm2O3 chemical color is superposed, delta E is less than or equal to 0.5, and the color is changed along with the angle and does not fade; after decoration firing of a finished product, embossment line patterns can be engraved inside and outside the ceramic body through femtosecond laser, due to the fact that the main body of the ceramic body is high in light transmittance, when light directly irradiates or enters the interior from the top as a bottle, halo of the embossment line patterns engraved inside and outside can be scattered on the surface, and the overall optical effect is improved; the ceramic is suitable for high-grade decorative ceramics such as bottles and ornaments.

The invention relates to the technical field of high-power femtosecond laser manufacturing, and discloses a high-power industrial femtosecond laser water cooling structure and a thermal stability optimization method thereof. Comprising the steps that an adjustable flow resistance valve driven by a shape memory alloy is arranged in a cooling water channel in a machine shell water cooling plate, and a temperature sensor is embedded in a key position of the machine shell water cooling plate; a paraffin-based or metal-based phase change material is filled at the bottom of the heat dissipation chute of the shell water cooling plate; an ultrathin uniform-temperature plate is embedded in the water-cooling plate of the casing, so that heat of local hot spots, such as heat near a reflecting mirror seat, on the water-cooling plate of the casing is quickly diffused to the whole water-cooling plate; bionic guide vanes are arranged in the cooling water channel; an aerogel heat insulation layer is additionally arranged between the machine shell water cooling plate and the outer shell, the machine shell water cooling plate and the outer shell are connected through a titanium alloy connecting piece with a low expansion coefficient, and a flow channel cover plate and the machine shell water cooling plate are flexibly connected through a metal corrugated pipe.

The invention discloses a BDD electrode material and a preparation method thereof. The preparation method comprises the following core steps: pretreating the surface of a porous titanium substrate; depositing a nanoscale TiN film layer on the surface of the pretreated porous titanium substrate in advance; depositing a layer of single-walled carbon nanotube network on the TiN thin film layer by using an electrophoretic deposition method; growing a highly-doped BDD layer on the single-walled carbon nanotube network by adopting a plasma enhanced chemical vapor deposition technology; repeating the two steps to form a multi-layer SWCNT / BDD composite structure, and controlling the thickness of the multi-layer SWCNT / BDD composite structure to be 1-50 microns; and finally, depositing a low-doped BDD active layer with the thickness of 1-5 microns by adopting a hot filament chemical vapor deposition (HFCVD) technology. According to the pulse laser assisted preparation process provided by the invention, the femtosecond laser pulse is introduced to replace traditional plasma treatment, so that the process flow is simplified, and the efficiency is improved; according to the technology, the process is simplified, the quality of the TiN film is improved through accurate energy input, and a new way is opened up for further improving the performance of the BDD electrode.

The invention relates to the technical field of program control, and discloses a femtosecond laser process parameter self-optimization method and system, and the method comprises the steps: carrying out the image reconstruction of real-time three-dimensional shape data, and obtaining a real-time ablation contour image; performing morphological feature deconstruction on the real-time ablation contour image to obtain a contour feature parameter set; performing deviation quantitative analysis on parameters in the contour feature parameter set and a standard feature threshold range to obtain a deviation feature vector; performing compensation strategy addressing on a preset process parameter adjustment rule base to obtain a preliminary compensation parameter combination; virtual machining track planning is carried out on the machined area, ablation morphology deduction is carried out on the planned track, and a fitting verification result is obtained; when a fitting verification result meets a convergence condition, performing parameter solidification packaging on the initial compensation parameter combination to obtain a final compensation parameter; according to the method, the self-optimization efficiency of the femtosecond laser process parameters can be improved.