14 results about "Long pulsed laser" patented technology

The application relates to the technical field of isotope detection, in particular to an isotope abundance and ratio detection device and method based on molecular emission spectrum. The device comprises a computer and a long-pulse laser unit, an optical path transmission unit, an LED illumination focusing unit, a three-dimensional displacement table and a spectrometer connected with the computer. The existing viewpoint considers that long-pulse laser is not conducive to micro-area excitation and high-resolution spectrum acquisition due to its wide pulse width, and is less applied in isotope subtle spectral line difference identification. The application breaks through the molecular emission cascade mechanism, enhances the signal intensity, realizes the possibility of micro-area high-resolution isotope molecular detection, generates plasma by in-situ laser ablation, induces molecular emission spectrum, realizes rapid, accurate and real-time in-situ detection of the isotope abundance and ratio in the sample. The device has few optical elements, simple structure and convenient optical path adjustment, and is conducive to miniaturization and on-site application promotion.

The application provides a kind of laser repair system and method for annulus fibrosus injury based on gradient light spot and alternate pulse, belong to biomedical laser technology field, including: gradient light spot generation module is configured to generate annular light spot with energy gradient;Alternate pulse module is configured to generate and output alternate short pulse laser and long pulse laser;Minimally invasive operation integrated unit, its inside integrated gradient light spot generation module and alternate pulse module, and be configured to adapt minimally invasive operation scene;Gradient light spot generation module and alternate pulse module cooperate to realize laser repair to annulus fibrosus injury.The application realizes the layered accurate repair of annulus fibrosus injury by the synergistic effect of gradient light spot generation module, alternate pulse module and minimally invasive operation integrated unit, avoids tissue thermal injury while improving repair effect, and adapts minimally invasive operation scene.

According to the femtosecond laser transient regulation and control-long pulse laser melting collaborative additive manufacturing system, transient excitation is conducted on electrons in a high-melting-point material through femtosecond laser pulses, selective heating is conducted on an excitation area through long pulse laser, and the optical absorption characteristic of the excitation area on the long pulse laser is changed; the energy absorption efficiency of an excitation area is improved, the power density required by forming is reduced, and molten pool heat mass transportation is stabilized, so that high-quality, high-precision and high-efficiency additive manufacturing of ceramic, glass powder or metal / ceramic multi-material powder is realized, and the method is particularly used for manufacturing large, medium and small components with complex structures; the formed parts can be widely applied to various fields of aviation, aerospace, automobiles, medical treatment, scientific research and the like; therefore, the problems that high-quality, high-precision and high-efficiency of high-melting-point ceramic, glass, metal powder or multi-material powder laser additive materials cannot be considered in the prior art, and light path alignment is complex in a heteroaxial double-laser system are solved.

The invention provides a glass substrate processing method and an electronic device manufacturing method. The glass substrate processing method comprises the following steps: irradiating a glass substrate with ultraviolet wavelength pulse laser to form a through hole; irradiating a region surrounding the through-hole and extending from the inner wall of the through-hole in a predetermined range with an ultrashort pulse laser to form a metamorphic part; and etching the glass substrate by using an etching solution having a higher etching speed for the metamorphic part than the etching speed for the glass substrate other than the metamorphic part so as to enlarge the aperture of the through hole.

The invention relates to the technical field of ceramic matrix composite part machining, in particular to a ceramic matrix composite flow guide plate machining method which comprises the steps that a part blank of a fan-shaped section structure is machined, a central positioning hole, a fan-shaped section bevel edge, an inner arc edge and an outer arc edge are roughly machined through long-pulse laser, and then the fan-shaped section bevel edge, the inner arc edge and the outer arc edge are machined; performing finish machining on the outer molded surface, the bevel edge of the fan-shaped section, the inner arc edge, the outer arc edge, the inner molded surface and the central positioning hole by adopting ultrasonic vibration auxiliary milling equipment, and finally performing laser machining on the air film hole; and the whole ring blank is machined, ultrasonic vibration auxiliary milling equipment is firstly adopted for machining, then laser machining is conducted on the air film hole, then long-pulse laser is adopted for cutting the whole ring blank into a part blank, and finally the ultrasonic vibration auxiliary milling equipment is adopted for conducting finish machining on the part blank. According to the method, long pulse laser cutting and ultrasonic vibration auxiliary milling machining are combined, and the air film holes are machined through laser, so that the machining stability, efficiency, reliability and quality of the ceramic-based composite material flow guide plate can be improved.

The invention discloses a fuel retention in-situ nondestructive diagnosis system and method for a high-heat-load plasma superconducting linear device wall material, and belongs to the technical field of magnetic confinement controllable thermonuclear fusion. The system is installed on a high-heat-load plasma superconducting linear device and acts on a sample installed on the high-heat-load plasma superconducting linear device. The long pulse laser induction unit is used for generating long pulse laser with the pulse width at the millisecond magnitude; the spectrum detection unit is used for collecting characteristic spectrum signals radiated by excitation after desorption fuel gas enters the main plasma; and the magnetic field collaborative diagnosis unit is used for establishing a corresponding relation between laser parameters and spectrum acquisition parameters required for obtaining an optimal diagnosis signal under different magnetic field intensity conditions based on experimental calibration. The feasibility of LIDS in a high-intensity magnetic field is verified and determined, the problems of removal and quantitative analysis of fuel gas retained in a wall material due to insufficient transportation and combustion in the magnetic field are solved, and a complete scheme for online and nondestructive diagnosis of fuel retention of the first wall is provided.

A technology using laser thin-film electrode structure processes in a gas detection chip is provided. Different from traditional chemical etching or long pulse laser processing methods, a manufacturing method of the gas detection chip uses an ultrafast laser process to manufacture thin-film composite structures in gas detection development, and employs a multi-scale composite structure made of flexible materials (e.g., polyimide substrates) for gas detection. The gas detection chip prepared by the manufacturing method meets the demand for portable micro gas detection.

1. The name of the design product: long pulse laser therapeutic instrument. 2. The use of the design product: for medical devices. 3. The design features of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design features: perspective view.

The invention belongs to the field of metal laser additive manufacturing, and discloses a composite ultrafast-continuous-long pulse laser cold and hot processing synergistic additive manufacturing method. According to the method, through time sequence synchronization and coaxial coupling, three laser beams are shaped into flat-topped light beams, pre-modified ring-core melting zone-crystal grain regulation and control zone space distribution is constructed, a time-space-power-duty ratio four-dimensional cooperation strategy is adopted, ultrafast laser is adopted for pre-activation and weakening of metal bonds, continuous laser low heat is adopted for forming a stable molten pool, and the stable molten pool is formed. And long pulse laser is used for crushing dendritic crystal arms to refine crystal grains, and closed-loop regulation and base material pretreatment are matched, so that low-energy-consumption and high-precision machining is realized. According to the workpiece prepared through the method, a homogeneous equiaxed crystal structure can be obtained, the mechanical property is remarkably optimized, and the workpiece is suitable for various metal materials, can be applied to the high-end fields such as aerospace and has high industrial value.

According to the long-pulse laser additive-ultrafast laser coaxial strengthening fusion manufacturing method, long-pulse laser is adopted as an additive melting energy source, and the comprehensive mechanical property better than that of continuous laser can be obtained; after the material is melted, ultrafast laser is used for coaxially irradiating the formed material, the limitation of off-axis strengthening is avoided, internal defects are reduced through high-frequency periodic impact of the ultrafast laser, the microstructure is refined and regulated, the surface hardness of the formed material is improved, the fatigue life of the formed material is prolonged, and the performance of parts is further improved. Meanwhile, the adopted double light sources form coaxial coupling pulse light beams by using a beam combining element, so that the adoption of a plurality of sets of galvanometer scanning systems is avoided, the rapid and high-frequency conversion of irradiation pulses is realized through coaxial beam combination and sequential control, and the structural complexity of the device and the technical implementation cost are reduced.

1. The name of the design product: long pulse laser therapy instrument (Z110Max). 2. The use of the design product: for medical and cosmetic equipment. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.

The invention belongs to the technical field of laser cladding and surface strengthening, and particularly relates to a pulse laser in-situ impact type double-beam composite cladding head which comprises a main beam channel connected with a continuous fiber laser or a long pulse laser and used for transmitting molten laser; the auxiliary light beam channel is connected with the high-frequency pulse laser and transmits pulse laser; the beam splitting and shaping module is used for realizing beam combination or paraxial output of the two paths of laser; the cooling channel is connected with the cooling system through a pipeline; and the powder feeding channel is used for coaxial or lateral powder feeding. According to the scheme, the stable molten pool is formed through the main light beam, the auxiliary light beam irradiates the molten pool in a set angle and pulse mode, transient impact and disturbance on the molten pool are achieved, strong convection in the molten pool is promoted, air hole escape is accelerated, grains are refined, the powder wettability is improved, and the compactness, uniformity and metallurgical bonding quality of a cladding layer are improved. The device has the characteristics of compact structure and independent and controllable light path, and is suitable for preparation of various functional coatings and surface strengthening of components.

According to the method and system for modifying the two-dimensional material through the laser and the two-dimensional material, the two-dimensional material to be machined is fixed to the electrode and leveled, the accuracy and stability of the relative position between the area to be modified and the laser focus in the subsequent laser machining process are guaranteed, and a solid foundation is laid for high-precision modification. Ultrafast laser parameters of an ultrafast laser are set, the requirement that the pulse width is larger than 1 ps is determined, and the unique cold machining mechanism of interaction of ultrafast laser and substances is fundamentally utilized; when ultrafast laser with the pulse width larger than 1ps acts on the two-dimensional material, laser energy is absorbed within the time scale far faster than material lattice thermal diffusion due to the extremely high peak power and the extremely short acting time of the ultrafast laser, the nonlinear absorption process is mainly triggered, and therefore accurate removal or modification of the material can be achieved with extremely small thermal influence, and the material can be effectively removed or modified. And melting, splashing and thermal damage caused by traditional long-pulse laser processing are avoided.

The invention discloses a copper-aluminum dissimilar metal multi-process coupling laser welding strengthening method which is characterized in that in-situ coordination of welding, stress inversion, targeted strengthening and closed-loop repair is realized by integrating a three-layer coaxial nozzle end effector, a composite laser source and a digital twin system; synchronously stabilizing the temperature of the welding pool at 2200-2500K through PID (Proportion Integration Differentiation) closed-loop control; after welding, residual stress and IMC distribution are inversed based on a digital twin heat-force coupling model, and a targeted impact path is generated; switching short pulse laser to combine with a constraint water film to realize impact strengthening, introducing + 800-+ 1200 MPa residual compressive stress, and inducing a nanocrystalline structure; and finally, through hot nitrogen transient drying and ultrasonic closed-loop repairing, joint manufacturing is completed. According to the method, the process period is shortened, the joint tensile strength is improved, and the problems of excessive brittle phases, stress degradation and low efficiency of traditional copper-aluminum welding are effectively solved.