5222 results about "Laser beams" patented technology

The invention provides a broadband tunable low-phase-noise photo-generated microwave signal source and device, and relates to the technical field of photo-generated microwaves. According to the invention, a low-frequency optical pulse and a high-frequency microwave signal are respectively input into the electro-optical sampling phase-locked loop; and the electro-optical sampling phase-locked loop determines the synchronization error of the optical pulse and the microwave signal based on the phase difference between the optical pulse center point and the microwave signal zero crossing point. And taking the synchronization error as a feedback signal, and continuously adjusting the frequency and the phase of the microwave signal by the voltage-controlled oscillation module until the frequency and the phase are synchronized with the Nth harmonic of the optical pulse. By setting different initial frequencies of the voltage-controlled oscillation module, microwave signals with different integral multiple optical pulse frequencies can be obtained, and broadband tuning of photo-generated microwave signals is realized. Furthermore, the repetition frequency of the frequency comb is locked through beat frequency of two beams of reference laser and two adjacent comb teeth, the stability of the reference laser is transmitted to the optical pulse, and the stability of the reference laser is further transmitted to the microwave signal through synchronization of the optical pulse and the microwave signal, so that the phase noise of the photo-generated microwave signal source is reduced.

A flight path clearing system comprising a laser beam system in an aircraft and a controller. The controller is configured to select a number of characteristics for a laser beam based on an object type. The controller is configured to control the laser beam system to emit the laser beam with the number of characteristics in a direction relative to a flight path of the aircraft. The controller is configured to control the laser beam system to move the laser beam with the number of characteristics selected for the object type to scan an area using a pattern that is based on a sequence of locations in the pattern being nearest to a center of the area, wherein a number of objects of the object type hit by the laser beam is cleared from the flight path.

The invention discloses a handheld multi-beam alignment fiber bragg grating sensing device and method. The handheld multi-beam alignment fiber bragg grating sensing device comprises a passive sensing grating assembly, a handheld module and a demodulation control module. The passive sensing grating assembly converts laser propagating in the optical fiber into a spatial light parallel laser beam and concrete an invisible passive end optical axis; the handheld module is used for realizing multi-beam high-speed space scanning and completing laser collimation and projection; and the demodulation control module is used for generating and distributing multiple paths of sensing laser and controlling the galvanometer in the handheld module to move synchronously. Due to the adoption of the hollow circular ring, the invisible virtual optical axis of the passive end can be visualized, an operator can conveniently and roughly recognize the position of the optical axis of the passive end, and the manual alignment efficiency is greatly improved. And meanwhile, one laser beam is divided into four laser beams by adopting a two-stage light beam increasing method, and the four laser beams are scanned through a galvanometer module and an off-axis parabolic mirror to form hundreds of laser beams in time, so that the space coverage is large, and the alignment efficiency is greatly improved.

Disclosed in the present invention are a dual electro-optic frequency comb-based laser tracking interferometric spatial coordinate measurement system and method. Multiple target mirrors are identified by means of a vision module, to guide a rotating mirror to direct laser light toward each target mirror individually. A laser tracking interferometric ranging module obtains a tracking error of the laser beam deviating from the center of the target mirror to be used for closed-loop tracking control. A light source module outputs single-frequency laser light traceable to a gas absorption peak. By controlling a light source modulation module to enable or disable an electro-optic phase modulation drive signal, dual electro-optic frequency combs or dual-frequency continuous-wave laser light is outputted. In a tracking state, the laser tracking interferometric ranging module respectively uses the two light sources to measure the absolute distance and the relative displacement of a target mirror, and the real-time distance between the target mirror and an original point is computed by means of distance fusion; the elevation angle and the azimuth angle of the target mirror are obtained in real time by means of an azimuth angle and elevation angle measurement module; tracking control and coordinate computation are carried out by means of a tracking control and signal processing module and a computer, and finally three-dimensional spatial coordinates of all the target mirrors are measured.

The invention discloses a wine jar interior three-dimensional measurement device and a wine jar interior three-dimensional modeling method, and relates to the technical field of three-dimensional modeling, the wine jar interior three-dimensional measurement device comprises a fixed cover, a movement mechanism and a three-dimensional information acquisition mechanism, the fixed cover is used for being fixed at a wine jar opening; the movement mechanism is movably connected to the fixed cover; the three-dimensional information acquisition mechanism comprises a conical laser, a first connecting column and a first camera which are connected in sequence, the first camera is connected to the movement mechanism, and the conical laser is located at the position away from the movement mechanism; the movement mechanism is used for driving the conical laser and the first camera to move along the axial direction of the wine jar; the conical laser is used for emitting conical laser to the inner wall of the wine jar, and the first camera is used for collecting a laser image of the laser projected on the inner wall of the wine jar; according to the technical scheme provided by the invention, the modeling efficiency can be improved while the modeling cost is reduced.

The invention relates to the technical field of intelligent manufacturing, in particular to a fur processing laser cutting machine and an intelligent control system and a cutting method thereof. The fur processing laser cutting machine comprises a rack, a material transferring mechanism, a negative pressure stabilizing device, a laser cutting mechanism and an intelligent control device, the material transferring mechanism is arranged in the feeding direction of the rack and comprises a fur preprocessing part and a net-shaped conveying belt, the negative pressure stabilizing device is arranged below the net-shaped conveying belt, and the laser cutting mechanism is arranged below the negative pressure stabilizing device. The laser cutting mechanism is erected on the machine frame and located above the net-shaped conveying belt, and the intelligent control device cooperates with the control focus depth and the cutting path of a laser beam based on the fur thickness and deformation data. By optimizing cooperative work of the fur feeding system, the fur pretreatment part, the negative pressure stabilizing device and the intelligent control system of the laser cutting machine, the defects of an existing fur processing laser cutting machine in the aspects of cutting precision and wool stability are overcome.

The invention provides a wafer thinning equipment control method and device, electronic equipment and a storage medium, and relates to the technical field of wafer thinning. The method comprises the following steps: monitoring spreading and thinning behaviors of a spin-coating liquid film in real time and generating a residual layer distribution diagram; according to an area indicated by the residual layer distribution map, obtaining local thickness information by analyzing a fluorescence signal received from the area; after a laser beam is used for scanning the surface of the wafer, micro-vibration signals are recognized and extracted by analyzing reflected light signals; dividing the surface of the wafer into a plurality of grid areas; and the risk of generating cracks in each grid area is evaluated, and a wafer surface risk thermodynamic diagram used for controlling the grinding head and the grinding fluid is generated. The method aims at solving a series of problems caused by a microcosmic residual layer on the surface of the wafer or surface energy difference in the wafer thinning process, early and accurate sensing of microcosmic abnormity on the surface of the wafer is achieved, and a control system is guided to conduct regional and self-adaptive grinding parameter adjustment.

The invention provides a rapid calibration method and system for angle measurement precision of a laser seeker. The method comprises the following steps: emitting a laser beam to a calibration rod array through a laser seeker, and collecting the displacement of a laser spot reflected by the surface of each calibration rod through a position sensitive device; inputting the laser spot displacement into a spot displacement feature extraction network, and generating an angle and displacement time sequence containing a timestamp; identifying abnormal sampling points in the angle and displacement time sequence; and performing geometric reconstruction on the abnormal sampling points by adopting a space geometric constraint optimization algorithm and combining a fixed space included angle constraint relation to obtain angle measurement error calibration parameters of the laser seeker. According to the technical scheme provided by the invention, the high-precision dynamic calibration of the angle measurement error of the laser seeker is realized through the collaborative analysis of the space coordinates of the calibration rod and the displacement of the laser spot in combination with the neural network and geometric constraint optimization.

The invention relates to the technical field of laser micromachining, in particular to a TGV drilling machining system and method based on a space-time modulation Bessel beam, an initial laser beam is output through a laser device, the initial laser beam is modulated into a dynamic pulse sequence through a pulse chirp regulation and control module, axial energy attenuation is compensated, a machining subsystem generates the Bessel beam, and the TGV drilling machining system and method based on the space-time modulation Bessel beam are obtained. The angle is finely adjusted in real time through piezoelectric driving, and a dynamic spatial light modulator loads an exponential decay type phase mask, so that light beam airspace shaping, non-diffraction light beam generation, pulse time sequence and phase parameter synchronous control and high-peak power pulse array are realized, and finally, integrated micro-perforation and channel modification of the glass substrate are realized; and the machining efficiency and precision are obviously 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.

This invention belongs to the field of engineering measurement technology, specifically a field measurement device for architectural design. The device includes a tripod with a total station mounted on top. A sliding cylinder shields the device from strong light, preventing ambient light from affecting the laser beam and improving the accuracy of laser beam identification and calibration. A conical column, with its conical base, inserts into the soil, enhancing stability during operation and reducing detection errors caused by device sway. A first spring improves adaptability to ground surfaces of varying hardness, enhancing the device's versatility. When the two sliding plates abut against each other, they form a relatively enclosed environment, further reducing the influence of the external environment on the laser beam and improving the accuracy of laser beam identification and calibration.

The invention relates to the technical field of laser shaping, in particular to a light spot shaping method and system based on a spatial light modulator, and the method comprises the steps: providing and expanding an incident laser beam in Gaussian distribution, and obtaining a collimated and expanded beam; irradiating an incident laser beam to a spatial light modulator, loading a preset phase modulation pattern to modulate a wavefront phase, and outputting a phase modulation beam; the phase modulation light beam is input into a 4f imaging system, a spatial light modulator is located on the front focal plane of a first lens, and the light beam forms a light field with target intensity distribution on the rear focal plane of a second lens after passing through the system; and the light field is focused on the surface of a workpiece to be processed through an objective lens to form a flat-topped light spot. According to the scheme, uniform light intensity distribution can be flexibly generated without replacing optical elements, the uniformity and utilization efficiency of laser energy in a machining area are remarkably improved, and the problem of material damage or insufficient edge machining caused by too strong center energy is effectively solved.

Provided is a medical skin treatment device including a control unit for controlling the operation of the skin treatment device; a main body which includes a transfer unit and a power supply unit; and a handpiece which is supplied with power from the power supply unit and controlled by the control unit and one side of which is brought into contact with a patient's skin to irradiate same with laser beams. The handpiece includes at least four different laser diodes; the at least four laser diodes radiate laser beams of four different wavelengths and comprise first laser diodes, second laser diodes, third laser diodes, and fourth laser diodes; the number of the first laser diodes is 30 percentage or less of the total number of the laser diodes; and the number of the fourth laser diodes is 25 percentage or greater of the total number of the laser diodes.

The invention discloses a laser-assisted helium arc penetration fusion welding method, and belongs to the technical field of welding. The problems that according to an existing paraxial laser-electric arc composite structure, the welding track is difficult to control, the energy coupling efficiency is low due to laser energy loss, and weld joint partial melting and undercut defects are caused due to uneven distribution of a welding temperature field due to a generated asymmetric heat source are solved. The welding method comprises the steps of 1, pretreatment; 2, after being focused by a focus lens, the laser is divided into three laser beams through a spectroscope, then the three laser beams are converged again through a plurality of reflectors, three fan-shaped light spots are formed on the surface of the to-be-welded plate after convergence, and finally the focal plane position of the laser is adjusted to be located on the surface of the to-be-welded plate; 3, setting welding current and arc voltage; and fourthly, laser is used for assisting helium arc penetration fusion welding. The method is used for laser-assisted helium arc penetration fusion welding.

A method for designing a digital twin of a coated spectacle lens with a computer for the purpose of a use of the digital twin for manufacturing a coated spectacle lens and a method for manufacturing a coated spectacle lens are provided. The spectacle lens contains a predefined structure or a plurality of predefined structures. The predefined structure or structures are formed by selectively curing the coating composition with a laser beam.

The invention discloses a welding seam quality detection system and method based on a laser technology, and the system comprises a laser collection module which is used for emitting a laser beam to a to-be-detected target welding seam, and collecting a beam signal reflected by the target welding seam; the light path transmission module is used for receiving and transmitting the light beam signal; wherein the light path transmission module comprises a light path adjusting unit and a photoelectric receiving unit, the light path adjusting unit is used for adjusting the propagation path of the light beam signal so that the light beam signal can be propagated to the photoelectric receiving unit, and the photoelectric receiving unit is used for converting the light beam signal into an electric signal; and the signal processing module is used for receiving the electric signal and detecting the quality of the welding seam according to the electric signal. Welding seam detection is achieved through the laser technology, and the welding seam quality detection effect can be improved.

The invention discloses a thick plate titanium alloy narrow gap laser-MIG hybrid welding device which is characterized by comprising a hybrid welding head module, a magnetic field regulation and control module, a double-oscillation collaboration module and an integrated protection module. The composite welding head module comprises an MIG welding gun and a laser gun head; the magnetic field regulation and control module comprises a magnetic field generation device arranged on the outer side of the MIG welding gun in a sleeving mode and a magnetic conduction rod stretching into the narrow gap groove, and the end of the magnetic conduction rod is parallel to the horizontal direction and is centered with the front end of the welding wire. According to the narrow-gap laser-MIG hybrid welding device for the thick titanium alloy plate and the using method of the narrow-gap laser-MIG hybrid welding device, an alternating magnetic field is introduced, electric arcs swing periodically and achieve precise cooperation with laser beam oscillation scanning motion, and on the premise that the welding quality is guaranteed, the welding efficiency is greatly improved. Efficient and high-quality welding of the thick plate titanium alloy narrow-gap connector is achieved, and the method has the remarkable advantages of being high in efficiency, low in material consumption, low in defect rate and the like.

The invention relates to the technical field of marking machine devices, in particular to a marking machine for advertisement-level reflective film production, which comprises an operation bracket, a laser marking machine main body is mounted at the upper end of the operation bracket, and a marking platform is arranged on the inner side of the operation bracket. A pre-printing film material pretreatment mechanism used for treating the surface of a reflective film before printing is arranged at the position, close to the front portion, of the upper end of the marking platform, and a post-printing precision treatment mechanism used for treating the surface of the printed reflective film is arranged at the position, close to the rear portion, of the upper end of the marking platform. Various kinds of dirt are adhered and removed through the adjustable flexible rubber sleeve, self-cleaning of the assembly is achieved in cooperation with the scraper, interference factors on a laser beam propagation path are thoroughly removed, and a clean and flat machining basis is provided for subsequent laser marking.

The invention discloses a vacuum cup welding device which comprises a machine table, a vacuum cup welding device and a welding device. The overall position adjusting mechanism is used for vertically and horizontally adjusting the position; the angle adjusting mechanism is arranged on the overall position adjusting mechanism, adjusts the vertical height and the horizontal position through the overall position adjusting mechanism and is used for adjusting the angle; and the welding mechanism is arranged on the angle adjusting mechanism, the angle of the welding mechanism is adjusted through the angle adjusting mechanism, the angle of the welding mechanism can be adjusted under the condition that the distance is not changed, and the welding mechanism can switch the scanning state and the welding state by adjusting the position of a laser convergent point. The position and angle of the welding mechanism are adjusted through the overall position adjusting mechanism and the angle adjusting mechanism, and the welding mechanism adjusts the position of the lens through the dual effects of air pressure and a supporting spring, so that laser beam convergent points are in two modes, one mode is that the laser beams converge at the welding position to generate high temperature to weld the vacuum cup, and the other mode is that the laser beams converge at the welding position to generate high temperature; and according to the other method, light spots are formed to irradiate the welding position to judge the gap condition, if the gap is larger than the error threshold value, welding is stopped, and if the gap is smaller than the error threshold value, the laser irradiation time during welding is adjusted according to the size of the gap, so that the welding quality is improved.

The invention relates to the technical field of drainage control, in particular to an intelligent cerebrospinal fluid drainage rate and pressure cooperative control system and method. The system comprises a drainage pipeline module, a positioning adjustment module, an intelligent pump control module, a monitoring sensing module, a cooperative control module and a man-machine interaction module, and can be used for establishing a cerebrospinal fluid drainage channel and being connected with a drainage bag; a laser positioning pen fixed on the infusion rod emits a laser beam which is horizontal to a preset drainage plane and adjusts the hanging height; an infusion pump and a pump body controller drive cerebrospinal fluid to flow according to set parameters and generate flow velocity, flow and drainage time control signals, meanwhile, real-time intracranial pressure data, real-time flow and flow velocity data and physical sign data are collected, and a drainage height adjusting instruction or a pump control parameter adjusting instruction is generated; cooperative control over the drainage rate and the intracranial pressure is achieved, and system operation parameters, patient monitoring data and the drainage state are displayed. The drainage device can accurately control the drainage amount of cerebrospinal fluid.

The invention discloses a double-path laser interferometer, a grating measurement method and an optical detection system, and relates to the technical field of optical detection.The double-path laser interferometer comprises a laser light source for providing a laser beam, the light splitting module is used for splitting the laser beam into a first light beam and a second light beam, and the first light path module is used for enabling the first light beam to enter a measured grating and receiving first diffraction light emitted by the measured grating to form a first interferogram; the second light path module is used for enabling the second light beam to enter the measured grating and receiving second diffraction light emitted by the measured grating to form a second interferogram; the imaging acquisition modules are arranged on the light emitting sides of the first light path module and the second light path module respectively, and the imaging acquisition modules are set to determine the measurement result of the measured grating according to the first interference pattern and the second interference pattern, so that the measurement efficiency of the uniformity of the grating is improved on the premise that the measurement precision is not sacrificed.

The invention discloses a laser cleaning method for a magnesium-based foil, and belongs to the technical field of magnesium ion battery manufacturing. According to the laser cleaning method for the magnesium-based foil, the magnesium-based foil is magnesium foil or magnesium alloy foil, and the method comprises the following steps that laser cleaning is conducted on the magnesium-based foil through a laser device, and a laser beam conducts 45-degree cross filling path scanning on the surface of the magnesium-based foil; monitoring a plasma spectral line of laser ablation in real time by using a plasma spectrometer; based on the dynamic change of the magnesium characteristic plasma spectral line intensity, the cleaning parameters of the laser are adjusted; and after cleaning is completed, an oxide layer on the surface of the magnesium-based foil is removed. 45-degree cross filling path scanning is adopted, heat accumulation of a repeated scanning area can be reduced, during 45-degree cross filling, adjacent scanning lines cover in a cross mode, heat distribution is more uniform, heat of the scanning area can be reduced, and therefore the problems of local overheating and negative plate perforation or structural damage caused by too high energy are avoided.

The invention relates to the technical field of galvanometer control, and discloses a two-dimensional galvanometer scanning system transition track generation method, system and device and a medium. The method comprises the following steps: training a strategy-based reinforcement learning model to obtain a trained model; obtaining an initial pose and a target pose; inputting the initial pose and the target pose into a trained model for reasoning to obtain poses of a plurality of intermediate nodes until the position of the target pose is reached; and forming a transition track according to the intermediate node. According to the method, a reinforcement learning mode is adopted, transition curve parameters are dynamically explored based on the trained model, and a transition curve with shorter time consumption and smaller speed change rate is given, so that the influence of the inertia of the galvanometer on a scanning track is reduced, and it is ensured that a laser beam can form a high-precision and high-quality scanning pattern on the surface of a target.

The invention discloses a non-consistency multi-focus unit modification system for laser slicing of transparent materials. The non-consistency multi-focus unit modification system comprises an ultra-short pulse laser, a light beam regulation and control system, a light beam shaping system, a focusing objective lens, a visual positioning system and a high-precision three-dimensional motion platform, a transparent material sample wafer to be sliced is placed on the high-precision three-dimensional motion platform; the ultrashort pulse laser provides picosecond laser beams for the whole system, the laser beams generated by the ultrashort pulse laser are transmitted to the light beam shaping system through the light beam regulation and control system to generate multiple inconsistent laser beams, and the multiple inconsistent laser beams are focused and shrunk through the focusing objective lens to obtain multiple inconsistent focuses. The focus is focused in a transparent material sample wafer on a high-precision three-dimensional motion platform for slicing; wherein the high-precision three-dimensional motion platform realizes the movement of a transparent material sample wafer in x, y and z directions; and the visual positioning system is used for identifying and positioning the transparent material sample. On the premise that the slicing quality is guaranteed, the processing efficiency is remarkably improved.

The invention relates to a respiratory dust concentration online monitoring device and method for a coal mine, and belongs to the technical field of respiratory dust concentration monitoring. The device comprises a virtual impact separation module, a light scattering detection module, a flow control module and a data processing module. The virtual impact separation module is used for separating respirable dust and non-respirable dust; the respirable dust enters the light scattering detection module, the respirable dust is irradiated by a laser beam which is incident in the direction perpendicular to the flowing direction of the respirable dust, a scattered light signal obtained after dust scattering is transmitted to the data processing module, and the concentration of the respirable dust is calculated in real time; the flow control module is used for controlling the rotating speed of the sucking pump in real time. Through multi-technology fusion and intelligent algorithm compensation, the accuracy and environmental adaptability of respiratory dust concentration measurement are improved, the problems that a traditional separation device is prone to blockage and needs frequent maintenance are solved, and long-term continuous separation monitoring of respiratory dust can be achieved.

This application relates to the field of laser technology and provides an integrated fiber coupling device and apparatus. The device includes a beam combining module and a coupling filter module integrated within a housing. The beam combining module polarizes and combines the laser beam, which is then coupled into a fiber combiner via a first fiber and output as a second fiber. The output is then filtered by a cladding filter unit and output through a nozzle. The coupling filter module contains multiple fixed cavities with curved walls. The first fiber at the input end of the fiber combiner and the second fiber at the output end are respectively fixed in curvature by adhering to the corresponding curved walls before output. This device improves beam quality and overall heat dissipation efficiency. The curved wall structure fixes the curvature of the fiber, reducing fiber stress and bending radius, thus solving the problems of excessive bending stress and insecure fiber fixation in existing coupling units, which lead to poor stability and reliability of laser output.

The invention provides a three-dimensional simulation point cloud generation method, system and device and a storage medium, and relates to the technical field of three-dimensional perception detection, and the method comprises the steps: building a three-dimensional scene model of a target object, and loading three-dimensional vertex data; acquiring laser radar simulation parameters to generate an angle sequence emitted by each laser beam, and rendering each angle direction of the angle sequence into coordinates of pixel points of the three-dimensional scene model according to a preset pixel and angle mapping rule; calculating the three-dimensional scene model according to the angle sequence and the three-dimensional vertex data to obtain a pixel point depth value; performing projection matrix inverse operation on the depth value to obtain an actual distance from the starting point of each laser beam to the surface of the three-dimensional scene model; calculating a point cloud three-dimensional coordinate according to the actual distance and each angle direction; and generating point cloud data. In this way, laser radar simulation and graphic rendering are fused, laser radar scanning is converted into pixel-level calculation, point cloud tracking rays one by one is replaced, the simulation calculation order of magnitude is improved, and consumed time is shortened.

The invention discloses an intelligent detection device and method for the straightness of a linear guide rail, and relates to the technical field of straightness detection. According to the linear guide rail straightness intelligent detection device and method, through cooperation of the position adjusting disc mechanism, the driving pinion, the laser measurement mechanism and the reflector mechanism, straightness detection can be carried out on the top surface and the two side surfaces of the linear guide rail at the same time, and the detection efficiency is improved; the distance between the laser measuring mechanism and the to-be-detected surface of the linear guide rail can be changed, and due to the fact that the propagation paths of laser beams emitted by the laser measuring mechanism in the air are different and the influence of air disturbance is also different under different distances between the laser measuring mechanism and the to-be-detected surface of the linear guide rail, multiple times of detection can be carried out; multiple groups of data are measured, straightness detection results under different air disturbance conditions can be quickly obtained, and the influence degree of air disturbance on straightness measurement of the linear guide rail can be evaluated by comparing and analyzing the data.

The invention relates to the field of cell analysis, and provides a multi-mode digital micro-fluidic system and method for cell sorting analysis, the system comprises an active digital micro-fluidic platform, the active digital micro-fluidic platform comprises a micro-fluidic chip, an upper computer control system and an FPGA hardware circuit, an upper computer generates a liquid drop path planning instruction, the FPGA hardware circuit converts the liquid drop path planning instruction into an electrode driving signal, and the electrode driving signal is transmitted to the micro-fluidic chip; the nanoliter-grade liquid drops are driven to change between the electrodes; the optical tweezers platform comprises a laser device, an optical microscope and a CMOS camera, laser beams are generated by the laser device to form a three-dimensional optical potential well, the laser beams are transmitted into the micro-fluidic chip through the optical microscope to realize non-contact control on cells, and the CMOS camera records images and transmits the images back to the upper computer; the objective table clamp is used for realizing cooperative control of the optical tweezers and the active digital microfluidics; and the image recognition system is used for recognizing morphological characteristics of cells in the liquid drops based on a convolutional neural network and screening target cells. According to the invention, integration of high-throughput nondestructive cell sorting and in-situ multi-modal analysis is realized.

The invention relates to the technical field of laser beam shaping, discloses an active test method and system for a circuit breaker, and is used for solving the problem that the self-adaptive shaping capability of a CO2 laser beam is difficult to improve by the existing method. Firstly, a stable light path is constructed, and the stability of the light path is ensured through mechanical limiting, a thermal management module and multi-stage optical alignment; then low-power calibration is carried out, a deformable mirror initial driving table is generated through a least square inversion algorithm, and a flat-topped beam reference is established; data are collected through a wavefront sensor, a high-order mode is reconstructed, the voltage of a deformable mirror is dynamically refreshed, and wavefront control and scanning motion synchronization is ensured in combination with scanning galvanometer time sequence synchronization, closed-loop control and exception handling; monitoring the temperature of the deformable mirror, starting water-cooling adjustment, and correcting the driving table to cope with the heat effect; finally, a safety system is constructed, laser power, wavefront distortion and deformable mirror stroke parameters are monitored, dry gas purging is conducted on the diffractive optical element regularly, and safety guarantee and performance verification of the whole process are achieved.