110 results about "Co2 laser" patented technology

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.

The invention provides an electromagnetic field constraint system and constraint method for a CO2 laser amplifier, and the system comprises a spiral electrode which is wound on a discharge tube of the CO2 laser amplifier, the spiral electrode comprises a first DC positive electrode, a radio frequency positive electrode, a second DC positive electrode and a ground electrode which are sequentially and adjacently arranged, and the current flows through the first DC positive electrode in the electric field direction from the first DC positive electrode to the ground electrode. The electric field direction of the current from the second direct current positive electrode to the ground electrode is partially perpendicular to the electric field direction of the current from the radio frequency positive electrode to the ground electrode; the CO2 laser amplifier discharge tube and the Helmholtz coil are coaxially arranged, and the magnetic field direction of the Helmholtz coil is perpendicular to the electric field direction from the radio frequency positive electrode to the ground electrode. In the discharge area of the CO2 laser amplifier, the strong electromagnetic field restraint system is adopted, the vertical alternating high-voltage electric field and the vertical alternating high-voltage magnetic field are used for restraining plasma movement, the electro-optical conversion efficiency can reach about 20%, the CO2 laser power can be effectively improved, and the arc discharge problem under the high radio frequency power injection condition is avoided.

The invention provides a high-precision voltage-stabilizing constant-current power supply for continuous discharge of a CO2 laser, which relates to the technical field of high-voltage voltage-stabilizing constant-current power supplies and comprises a high-voltage direct-current voltage-stabilizing power supply and a high-impedance amplification loop. The high-voltage direct-current voltage-stabilized power supply is boosted by a transformer, rectified by a rectifier bridge and stabilized by a filter capacitor, and continuously adjustable high-voltage output of 0-30kV is provided; the high-impedance amplification loop is composed of an operational amplifier, a three-stage triode amplification circuit and an electronic tube, the output impedance reaches up to 650 megohms, and the high-impedance amplification loop has the excellent constant-current characteristic. The power supply can accurately adjust the output current in the range of 0-30mA, the current fluctuation is less than one thousandth, the power supply can continuously and stably operate for more than 18 hours, and the power supply is suitable for laser discharge control in a high-temperature and high-density plasma environment. According to the invention, high-precision output is realized by adopting common performance devices, the advantages of voltage resistance, overload resistance and cost are considered, and the problems of poor current stability and inconvenient adjustment of a traditional laser power supply are solved.

The utility model discloses a modularized CO2 laser ink-jet printer, which relates to the technical field of laser ink-jet printing and comprises an ink-jet printer main body, a second moving mechanism is mounted at the bottom of the ink-jet printer main body, and a first moving mechanism is mounted at the bottom of the second moving mechanism. By means of the design, rapid installation and disassembly of the code spraying device body are guaranteed, the modular replacement efficiency is improved, later maintenance and replacement of different types of code spraying devices are facilitated, in addition, a second moving plate has the function of flexibly adjusting the position of the code spraying device through pushing of a second air cylinder, and the code spraying device is convenient to use. Accurate positioning of the code spraying device under different working conditions is ensured, stable sliding and linear movement of the second moving plate are further ensured through the guiding effect of the second sliding rail and the limiting rod, deviation and vibration are reduced, and code spraying precision and code spraying definition are improved.

The trachea cannula comprises a cannula body, a fixing air bag, an anti-burning air bag and an anti-burning layer, on the first hand, the cannula body can be a hose, the cannula body can directly pass through the glottis, it is avoided that airflow influences the stability of tissue in an operation area, and the operation stability and safety are guaranteed; secondly, an anti-burning air bag can be arranged on the subglottic part, the air pipe and the glottis are directly blocked through the anti-burning air bag after the anti-burning air bag is ventilated, and the subglottic air pipe is prevented from being damaged by CO2 laser in the operation process; thirdly, the surface of the anti-burning air bag is covered with an anti-burning layer made of a contractile flame-retardant material, and serious complications caused by spontaneous combustion induced in the CO2 laser operation process can be prevented; fourthly, through the arrangement of an anti-burning air bag and an anti-burning layer, the gap between the glottis and the airway can be completely sealed conveniently, and the situation that bleeding and seepage flow into the airway in the operation process to cause related complications of the lung is prevented.

The invention provides a variable-depth multi-step ablation inhibition method for CO2 laser ablation knife lines of a fused quartz element, and belongs to the field of laser processing of optical elements. The invention aims to solve the problems that medium-frequency ripples are generated during conventional ablation of a fused quartz element, namely high processing knife lines influence the light transmission, and the service performance of a functional microstructure and the surface quality of a processing element are greatly influenced. According to the method, a processing strategy of gradually decreasing the ablation depth and a dislocation processing method adopted in each step of ablation processing are adopted, so that the height of the ablated knife lines on the processed surface of the fused quartz element can be effectively reduced, the surface roughness after processing is further reduced, the light transmission performance and the light transmission performance of a processed microstructure are improved, and the quality of the processed fused quartz element is ensured.

The utility model discloses gantry type five-axis CO2 laser cutting equipment, and relates to the technical field of laser cutting. Comprising an equipment cabinet, an upper cover is fixedly connected to the top face of the equipment cabinet, a five-axis movement mechanism, a clamping jig and a laser are arranged in the upper cover, a light outlet nozzle used for conveying laser emitted by the laser is installed at the end, facing the clamping jig, of the five-axis movement mechanism, and the five-axis movement mechanism is arranged above the clamping jig; an automatic roller shutter door is installed on one side of the upper cover, a U-shaped groove is formed in the top face of the side, facing the automatic roller shutter door, of the equipment cabinet, and a smoke suction mechanism is arranged on the inner wall, facing the automatic roller shutter door, of the U-shaped groove. A feeding mechanism used for conveying the PE film is arranged on one side of the equipment cabinet, and the feeding mechanism is arranged on one side of the automatic roller shutter door and communicates with the U-shaped groove. The special-shaped component machining device is suitable for various shapes, can effectively machine complex special-shaped components in a wider compatible range, and can meet various parameter requirements.

The utility model relates to the technical field of optical fiber cladding processing, in particular to CO2 laser etching optical fiber cladding processing equipment which comprises a machine frame and an optical fiber body, two clamping assemblies used for clamping the optical fiber body are symmetrically arranged on the front side of the machine frame, and an X-axis overall driving mechanism used for driving the clamping assemblies to move is fixedly installed at the inner bottom of the front side of the machine frame. According to the device, an ablation mechanism and a scattering mechanism are combined, high-efficiency stripping of cladding light power is achieved, the performance of an optical fiber in laser transmission, sensing and other applications is greatly improved through the characteristic, energy loss and signal interference caused by cladding light are effectively reduced, the CO2 laser ablation technology is adopted, and the laser ablation efficiency is improved. The device can accurately control the distance and the ablation depth in the etching process, optical fibers with different specifications and requirements can be finely processed by adjusting parameters of the laser emission assembly, it is ensured that etching of each part meets the preset standard, and the consistency and stability of processing are greatly improved.

This application provides a sheet-like spinel cobalt ferrite, its preparation method, and its application, belonging to the field of solid oxide battery technology. In this application, a Co source and an Fe source are dissolved in deionized water, citric acid is added and stirred until homogeneous, then heated in a water bath until the solution becomes a reddish-brown transparent gel. The gel is then dried and ground to obtain a first powder. The first powder is then subjected to two CO2 laser-induced oxidation processes in air at a laser power of x to obtain a second powder. Wherein, 4W < x ≤ 10W. Finally, the second powder is washed and dried to obtain a sheet-like spinel cobalt ferrite. Compared with ordinary spinel cobalt ferrite, using the aforementioned sheet-like spinel cobalt ferrite as a cathode material in SOFC can reduce the polarization impedance of the battery by 0.023 Ωcm. 2 The maximum power density increased by 0.38 W / cm². ‑2 This improves the oxygen reduction activity and stability of SOFCs. Furthermore, using CO2 laser-induced methods simplifies the preparation process, reduces time costs, and increases production efficiency.

This invention provides a sterile filling method and system that avoids or reduces the risk of disinfectant residue and achieves effective sterilization in a short time. One sterile filling method is a method for filling a sterilized container with contents, comprising: laser irradiation treatment, irradiating the container or container preform with a CO2 laser to sterilize the container surface; and filling treatment, filling the container with contents.

The invention provides a three-step polishing method for suppressing high-frequency errors in CO2 laser polishing of a fused quartz element, and belongs to the technical field of laser processing of optical elements. The invention aims to solve the problem that the optical transmission performance and the laser damage resistance of a fused quartz element are severely influenced by medium-high frequency error induced far-field light modulation and high-frequency error induced near-field light field enhancement when the fused quartz element is processed by laser. The method comprises the first step of laser preheating, the second step of high-speed multi-layer polishing and the third step of low-speed single-layer polishing, laser polishing movement tracks and polishing parameters of the corresponding steps are drawn, medium-high frequency and high-frequency errors of the surface of the fused quartz element subjected to laser polishing are greatly reduced, the machined surface almost has no surface knife lines, and the surface quality is improved. And the far-field light modulation and near-field light field enhancement effects are effectively reduced.

The application discloses a paper-based microfluidic intelligent wound monitoring bandage based on a laser-induced graphene electrode array and a preparation and signal processing method thereof. The bandage comprises a calcium alginate / zinc oxide antibacterial base, a wax-printed paper-based lateral chromatographic microfluidic channel layer, a CO2 laser direct writing LIG multifunctional electrode array, a colorimetric indication area, an NFC wireless communication module and a silver nanowire electrically controlled drug release module. The LIG electrode is fixed and modified by enzymes to detect uric acid, lactic acid, glucose and pH value respectively; the paper-based colorimetric disc detects bacterial protease and TNF-alpha; the NFC radio frequency field provides energy to realize battery-free operation. The built-in signal processing method comprises temperature compensation, cross interference elimination, multi-parameter fusion infection risk scoring and double-threshold closed-loop drug delivery decision. The preparation process mainly uses laser direct writing, screen printing and ion crosslinking, has low material cost and is green and environmentally friendly, and is suitable for closed-loop monitoring and treatment of chronic wounds at home and in clinic.

The application discloses a chamfering device and a processing method. The chamfering device comprises a laser emitting assembly, a positioning assembly and a transmission assembly. The laser emitting assembly comprises a laser source and a laser cutting head. The laser source is used for providing a CO2 laser beam for chamfering. The laser cutting head is used for converting the CO2 laser beam into a defocused CO2 laser beam and emitting the defocused CO2 laser beam to a chamfering edge of a workpiece to be processed. The positioning assembly is used for adjusting the relative posture of the laser cutting head and the workpiece to be processed, so that the defocused CO2 laser beam is irradiated to the chamfering edge at a preset incident angle. The transmission assembly is used for driving the relative movement of the laser emitting assembly and the workpiece to be processed, so that the defocused CO2 laser beam moves along the chamfering edge, and the chamfering processing of the chamfering edge is realized. The chamfering device utilizes the defocused CO2 laser beam to irradiate the chamfering edge for chamfering, and has the advantages of good processing environment, no water pollution, no abrasive wear, low noise and the like.

The invention relates to a maintenance method (25) for monitoring and maintaining electric compressors (7), in particular for circulating a laser gas (4) in a CO2 laser system (1), comprising the method steps of: b) reducing (26) a compressor speed (27) of the electric compressor (7) by changing a drive mode of an electric drive unit (22) of the electric compressor (7) into a generator mode; c) determining (32) a speed reduction by detecting the compressor speed (27) as a function of time (30); d) comparing (36) the speed reduction, in particular a deceleration curve (31), with at least one stored reference speed reduction (33); e) outputting (37) a maintenance recommendation on the basis of the comparison from method step d).

The present invention discloses a device for measuring the temporal gain evolution and relaxation process of CO2 laser amplification, belonging to the field of laser technology. The device comprises: a continuous CO2 laser seed source, a short-pulse CO2 laser seed source, a first beam splitter located in the outgoing optical path of the short-pulse CO2 laser seed source; a pulsed CO2 laser information detection module located in the transmitted optical path of the first beam splitter; a first thin-film polarizer located at the intersection of the reflected optical path of the first beam splitter and the outgoing optical path of the continuous CO2 laser seed source; a CO2 laser amplifier, a second thin-film polarizer, a second beam splitter, a chopper wheel module, and a first mercury cadmium telluride detector located sequentially in the outgoing optical path of the first thin-film polarizer; and a time gating circuit for controlling the on / off timing of the continuous CO2 laser seed source, the short-pulse CO2 laser seed source, and the CO2 laser amplifier. This device simplifies traditional gain measurement devices while simultaneously studying various relaxation phenomena during the amplification process.

The utility model belongs to the technical field of optics, and discloses a CO2 telecentric scanning field lens, which is applied to CO2 laser and comprises a first lens, a second lens, a third lens and a protective lens which are sequentially arranged along the incident direction of a light beam, the first lens is a negative-focal-power lens of a meniscus structure, the second lens is a positive-focal-power lens of a meniscus structure, the third lens is a positive-focal-power lens of a biconvex structure, the protective lens is of a flat plate structure, the concave surfaces of the first lens and the second lens face the laser incident direction, and the concave surfaces of the first lens and the second lens face the concave surface of the third lens. The lenses form negative-positive-positive focal power distribution, compact distribution and aberration correction are achieved, it is ensured that a laser beam keeps vertical incidence in the whole machining field of view, the problem of focus offset caused by light beam inclination of a traditional field lens is solved, the focusing difference between paraxial light beams and marginal light beams is eliminated, the phenomenon that the edge of a drilled hole has taper is avoided, and the machining precision of the drilled hole is improved. The rejection rate is effectively reduced and the product performance and reliability are improved.

A laser weeding robot and an operation method therefor. A robot body is a high-ground-clearance four-wheel independent steering movement platform, a laser light path is controlled by a laser galvanometer, a laser uses a CO2 laser having a wavelength of 10600 nm, and on the basis of Beidou satellite navigation, full-path automatic planning and full-automatic execution of movement from a robotic depot to a field and internal operation in a farmland can be achieved.

The utility model relates to a flat wire paint removing device in the technical field of flat wire motor stator production. The flat wire paint removing device comprises a CO2 laser generator, a first translation rotating shaft, a beam expander, a first reflecting mirror, a galvanometer, a field lens, a second translation rotating shaft, a second reflecting mirror and a third translation rotating shaft, the first reflector is fixed at one end of the second translation rotating shaft, and the second reflector is fixed at the other end of the second translation rotating shaft; one end of the third translation mirror is connected with the second reflector, and the other end of the third translation mirror fixes the galvanometer; and the field lens is positioned on the galvanometer. According to the utility model, the degree of freedom of the galvanometer and the scene is improved, so that the diversified layout application of the CO2 laser is not limited by the layout caused by the large size of the laser generator, and the application of the CO2 laser in a three-dimensional space can be realized.

The invention discloses a closed CO2 laser adopting diffusion cooling and longitudinal direct current discharge, and belongs to the technical field of laser beam combination, and the closed CO2 laser comprises a vibration suppression component which comprises a beam combination assembly, a laser used for emitting laser beams is arranged in the beam combination assembly, and a reflex reflector used for reflecting the laser beams is arranged in the beam combination assembly. An optical element used for transmitting and reflecting different laser beams is arranged in the beam combining assembly, through accurate light distribution of a reflex reflector and the optical element, reflection and transmission cooperative beam combination of four paths of laser beams with different polarization and different wave bands is achieved, and finally the four paths of laser beams are combined into one laser beam to be output. On the premise of keeping the original beam quality of the single-path laser, the power of the combined beam is increased by several times; and the beam combining light path is accurately matched with the light emitting path of the laser, additional optical loss is avoided, the light spot uniformity, the coaxiality and the polarization characteristic of the combined laser beams are guaranteed, and the strict requirement of industrial precision machining for the quality of the laser beams is met.

The invention relates to the technical field of polymer composite materials, in particular to a preparation method and application of a high-thermal-conductivity PET water-blocking tape. The invention aims to solve the technical problems of high raw material cost and difficulty in giving consideration to both thermal conductivity and flexibility. Surface-modified boron nitride nanosheets (BNNS) and silicon carbide whiskers (SiCw) are mixed according to a mass ratio to form a three-dimensional heat-conducting network, then uniformly dispersed heat-conducting filler slurry is prepared by adopting an ultrasonic-centrifugal gradient dispersion technology, and a composite film with a gradient dispersion structure is formed by adopting a three-layer co-extrusion technology, so that the problem of nanofiller agglomeration can be solved, and the heat-conducting property of the composite film is improved. And finally, preparing a vein-shaped micro-channel network on the surface of the membrane by using a CO2 laser micro-engraving technology, so that the heat dissipation uniformity is enhanced, and the water resistance of the micro-channel structure is not sacrificed. The PET water-blocking tape provided by the invention solves the contradiction between heat conduction and mechanical properties of a traditional blending process, can improve the heat conduction performance, reduce the water vapor permeation amount and improve the elongation at break, and has a wide application prospect in the fields of cables, optical cables and the like.

To provide a container sterilization method and container sterilization device which can realize effective sterilization in a short time while avoiding or reducing residual risk of fungicide.SOLUTION: A container sterilization method for sterilizing a container surface of a container or container preforming body includes a laser irradiation process of irradiating the container surface with CO2 laser, and a UV light irradiation process of irradiating the container surface with UV light.SELECTED DRAWING: Figure 1

The application provides a fused quartz microlens array preparation device and method based on CO2 laser ablation rapid removal and fused quartz microlens array preparation method, and belongs to the field of photochemical processing. In order to solve the problems of high cost, poor thermal stability and difficult to control the machining precision when machining the microlens array of the fused quartz hard and brittle material, and difficult to obtain the low-cost and high-quality microlens array. The coupling model of thermodynamics and fluid mechanics is established, the rough machining structure is simulated to determine the rough machining parameters, the best scanning track is obtained through path planning, the high-power density CO2 laser is used for ablation removal of the fused quartz, and the rapid forming of the microstructure is realized; the low-power density CO2 laser is used for irradiating the microstructure, and the precise fusion polishing is realized. Through the use of a set of CO2 laser for machining the microlens array, the machining cost is reduced, the problem of repeated installation and positioning of the workpiece is avoided, the machining efficiency is further improved, and the high-quality microlens array is prepared with high efficiency and low cost.

The application provides a magnetic control flexible CO2 laser few-mode multi-core energy transmission optical fiber and a preparation method thereof. The magnetic control flexible CO2 laser few-mode multi-core energy transmission optical fiber has at least two independent laser transmission structures, a polymer cladding layer wrapped around the outer periphery of the laser transmission structure, and a magnetic outer cladding layer wrapped around the outer periphery of the polymer cladding layer, a single laser transmission channel outputs less than two modes of CO2 laser, and the adjustable controllability of the optical fiber output light field is realized, while the flexibility, robustness and actuation of the optical fiber are ensured. By controlling the fiber core diameter or the refractive index difference of the core cladding material, the single optical channel laser single-mode or few-mode output can be controlled, by controlling the number, position, distance and adding the inter-channel polymer of the optical fiber laser transmission channel, the optical crosstalk between channels can be reduced, the output light field of the optical fiber can be precisely adjusted, by controlling the magnetic particle doping amount, diameter and external magnetic field of the magnetic outer cladding layer, the movement and turning of the optical fiber can be controlled, and high-precision minimally invasive surgical medical operation is realized.

The present application relates to paper tube processing technical field, specifically said is a kind of high-precision paper tube cutting equipment and control system, equipment rack is equipped with black silicon carbide ceramic lining support cylinder, coaxially into paper tube interior, realize full stroke rigid support, heat conduction and absorb CO2 laser, avoid metal mandrel reflection, thermal expansion and stagnation defects;External adjustable pressure roller drives paper tube rotation, lead screw driven laser cutting assembly axial movement ring cutting, lining cylinder integrated dust hole cooperate negative pressure dust removal.Control system PLC built-in ceramic heat-conducting thermal deformation compensation model, combined with real-time temperature dynamic correction cutting coordinates and laser power, matched with multiple sensor hierarchical safety monitoring, over-threshold automatic alarm stop.The present application solves the problems of traditional laser cutting pipe wall collapse, thermal shrinkage size deviation, optical components are easily damaged, dust fire risk and other high problems, cut flat no carbonization, adapt to optical film, adhesive tape and other high-precision paper tube batch processing.

The invention relates to the technical field of dyeing, in particular to a denim laser dyeing process which is characterized by comprising the following steps: S1, denim pretreatment: selecting base cloth: selecting pure cotton or cotton blended denim with the gram weight of 8-14 oz / yd2, namely 271-475 g / m < 2 >, pre-washing to remove flooding, and controlling the water content to be 6-8%; coating treatment is conducted, specifically, an environment-friendly anti-reflection coating is sprayed, the laser absorption efficiency is enhanced, the coating thickness is 10-15 microns, and the drying temperature is 80-90 DEG C; s2, laser parameter optimization: equipment configuration: a CO2 laser and an optical fiber laser are adopted, the power range is 20-200 W, the scanning speed is 300-1200 mm / s, and the diameter of a focusing spot is 0.1-0.3 mm; no chemical reagent exists in the whole process, the dye is vaporized only through laser, and the wastewater discharge amount is reduced by 95%.

This invention discloses a method for calibrating the internal optical path of a high-power CO2 laser, relating to the field of laser calibration technology. The method includes: connecting a CCD camera to a collimating telescope and displaying the image in real-time on a computer; installing a first fixture on the output window mount and a second fixture on a first corner mount, illuminated by an LED light source; focusing the fixture, using coarse and fine adjustments on the telescope support to simultaneously align the crosshairs with the centers of the two fixtures; sequentially transferring the second fixture to the second and third corner mounts, and adjusting the upper corner mount to align the crosshairs with the center of the transferred second fixture; installing a third fixture on the tail mount and illuminating it, adjusting the third corner mirror and the tail mount to align the crosshairs with the center of the third fixture, then removing the third fixture and installing the tail mirror; removing the first fixture and installing the output window mirror, adjusting the output window mount to align the crosshairs with its imaging center to complete the calibration. This method achieves rapid and high-precision calibration, ensuring calibration consistency and obtaining optimal light output performance.

The invention discloses a system for generating a multi-spectral-line CO2 laser pulse seed, which belongs to the technical field of CO2 lasers and comprises a resonant cavity comprising a reflecting element group, a first grating and a gain medium; the first grating is used for spatially separating light beams with different wavelengths in the gain medium to realize simultaneous oscillation of multiple spectral lines; the reflecting element group is used for reflecting each spectral line beam split by the first grating back to the gain medium in parallel; the beam selecting and expanding mechanism comprises an aperture-adjustable diaphragm group and a beam expanding lens group and is used for controlling the transverse mode and spatial distribution of each spectral line; and the cavity emptying structure is used for outputting all the light beams in the resonant cavity when the photons are accumulated to the maximum value so as to form a multi-spectral-line CO2 laser pulse seed. The pulse seed generation device can be applied to the LPP extreme ultraviolet lithography technology to generate pulse seeds for driving laser, and has the advantages of being low in cost, stable in output and good in pulse quality.

The application discloses a kind of laser-induced graphene immune rapid low-cost remote medical detection platform, it is related to biomedical detection technical field, the platform includes following component part: sensor array module: using CO2 laser engraving technology is formed on polyimide substrate and contains 4 graphene working electrode, 1 Ag / AgCl reference electrode and 1 graphene counter electrode patterned structure, through 1-pyrene butyric acid functionalization after specific antibody is fixed and is blocked with bovine serum albumin;The application greatly reduces the detection cost by using laser engraving graphene electrode preparation process, at the same time, by constructing the sensor array module comprising four graphene working electrode, a plurality of antibodies can be specifically fixed, the simultaneous detection of SARS-CoV-2 nucleocapsid protein, spike protein specific IgM / IgG antibody and C-reactive protein and other multiplex biomarkers is realized, sample detection cycle can be controlled within 10 minutes, greatly improve detection efficiency.

The application discloses a quartz glass laser welding method and an atomic cell, and belongs to the technical field of atomic cell packaging. The method is characterized in that first and second quartz glass components are butted to form a joint interface, and CO2 laser beams are used for welding, which is divided into two steps of pre-welding and main welding. In the pre-welding, a first laser power is used for scanning to form a plurality of discrete fusion points to fix the components; in the main welding, a second laser power larger than the first laser power is used for continuous scanning to form a sealing weld. The interval between adjacent fusion points formed by the pre-welding is less than 1.5 times the diameter of a main welding spot, so that the main welding weld can completely cover and fuse the discrete points, and the weld is continuous and uniform. By controlling the laser power and the scanning speed, the weld penetration is stabilized at 0.5 mm-2 mm, the air tightness is better than 8*10 ‑11 Pa·m³ / s, and the heat affected zone width is less than 1.5 mm. The application further discloses an atomic cell prepared by using the method, which can avoid component displacement and stress concentration, realize sealing welding with high air tightness and low heat affected zone, and improve the long-term stability of the atomic cell.

The present invention provides a method of cutting a composite material without causing cracks in the end surface of a brittle material layer after cutting and severe thermal degradation in the end surface of a resin layer after cutting, and the cut composite material can obtain sufficient bending strength. The present invention relates to a method of cutting a composite material (10) in which a brittle material layer (1) and a resin layer (2) are laminated, the method including: a resin removal step of irradiating the resin layer with laser light (L1) oscillated by a CO2 laser light source (20) along a cutting predetermined line (DL) of the composite material to form a processed groove (24) along the cutting predetermined line; and a brittle material removal step of irradiating the brittle material layer with laser light (L2) oscillated by an ultrashort pulse laser light source (30) along the cutting predetermined line after the resin removal step to form a processed trace (11) along the cutting predetermined line. The processed trace formed in the brittle material removal step is open at the resin layer side and does not penetrate the brittle material layer.