27 results about "High intensity lasers" patented technology

A counter high-energy laser system directs high-intensity laser radiation back to a threat laser in the form of an ultra-short optical pulse (USP). The retro-directed USP induces permanent internal optical damage in the threat laser, thus disabling the threat by exploiting the very high optical gain at the source of an incoming laser thereby causing an injected pulse to grow exponentially in energy and peak power within the threat laser optical train until it reaches a damaging threshold. The existing optical energy from the threat laser system and stored in the laser beam from threat system is exploited thereby enabling the size, weight, and power of the counter laser system to be significantly reduced. The wavelength of the counter pulse is automatically matched to the threat.

The invention discloses a gallium nitride HEMT (High Electron Mobility Transistor) device capable of monitoring temperature distribution in real time and a preparation method of the gallium nitride HEMT device. The device comprises a GaN buffer layer, a GaN channel layer, an AlGaN barrier layer, a P-GaN layer, a Ti / Al / Ni / Au ohmic contact layer, a SiNx isolation layer, a field plate, gate metal, a SiO2 passivation layer, a first metal layer, a first PI insulating layer, a first SiNx passivation layer, a second metal layer, a second PI insulating layer, a second SiNx passivation layer, a third metal layer, a patterned PI coating, an array temperature sensor and a PI passivation layer. The array temperature sensor is formed by connecting a TaN resistive film deposited by pulse laser, a carbon structure which is carbonized by direct writing of hundred TW / cm < 2 > magnitude high-intensity laser and takes graphene as a main part, and a copper nanowire electrode sintered by hundred TW / cm < 2 > magnitude high-intensity laser in a bridge manner. According to the gallium nitride HEMT device, the real-time accurate measurement of the heat distribution of the large-size packaged gallium nitride HEMT device can be realized.

Ophthalmic surgical system for the treatment of one eye (3), wherein the ophthalmic surgical system comprises: an optic (7), at least one laser light source (31, 59), a measuring module (57) with at least one light detector (69) and a control system (21); wherein the optics (7) are configured to focus laser light generated by the laser light source in a focal plane (33) of the optics (7) at several locations (47); wherein the optics (7) are further configured to guide light emanating from the locations (47) to the measuring module and to focus it at the measuring module; and wherein the control (21) is configured to set a position of the focal plane (33) in the eye depending on a detection signal (70) output by the at least one light detector (69); wherein the optics (7) comprises at least one deflection element (41) configured to shift the location (47) where the laser light passes through the focal plane (33) within the focal plane (33), and wherein the eye surgery system is configured to focus the laser light at a high intensity at location (47) in the focal plane (33) to modify a tissue of the eye; characterized by the fact that the control (21) is configured to move the location (47) along a line (48) so that the laser light is focused successively at the locations which lie on the elongated line; the eye surgery system has a first operating mode and a second operating mode, wherein in the first operating mode the laser light is focused at a low intensity at the locations and the position of the The focal plane (33) is set in the eye, and in the second operating mode the laser light is directed with high intensity to the locations in the The focal plane (33) is focused to modify the tissue of the eye, and the control (21) is configured in the second operating mode to set an intensity of the laser light focused at the locations and / or a speed of displacement of the location along the line depending on the detection signal.

1. The name of the design product: table type semiconductor laser physiotherapy instrument. 2. The use of the design product: through high intensity laser irradiation of blood to trigger a series of biochemical reactions in the human body, through the two aspects of blood and static blood to improve and restore the physiological function of blood, and to relieve pain after operation. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

A system and method for stress testing a sample, the system comprising a high-intensity laser unit and a target for laser-matter interaction, wherein the high-intensity laser unit delivers an intensity of at least 1013 W / cm2 on the target, and resulting laser-accelerated particles generated by the target irradiate the sample.

A lamp having a steerable beam suitable for use as a vehicle headlamp includes: a phosphor converter emitting white light from a location impacted by light from a laser; and at least one projection lens for transmitting the white light emitted from the phosphor converter as a light beam in a direction dependent on an emission position from the phosphor converter. There is at least one high intensity laser; and at least one multi-stage biaxial liquid crystal polarization grating for directing laser light from the at least one high intensity laser to a selectable position on the phosphor converter to change the direction of the light beam emitted from the lamp.

This invention relates to a safety measure taken against unsafe exposure of high-intensity laser light that is relevant for the reliable and safer operation of laser-based lighting devices. According to this invention, a lighting device comprises a first light-emitting semiconductor device and a light-conversion device. The first light-emitting semiconductor device is a laser device configured to generate a first light output and the 5light-conversion device is configured to receive the first light output and convert at least part of the first light output into a converted light output. The lighting device further comprises an optical element configured to receive the converted light output from the light-conversion device. The optical element is configured to transmit the converted light output and the first light output, and attenuate the first light output above a threshold value of the first light output.

The invention discloses a method for reducing a laser processing threshold by adopting cerium-doped glass. The method comprises the following steps: 1) selecting quartz glass or borosilicate glass as a glass substrate; 2) preparing the glass substrate selected in the step 1), specifically, 2.1) preparing a precursor liquid; (2.2) entering a mold; 2.3) drying treatment; 2.4) heat treatment and sintering; and 3) laser processing. The Ce < 3 + > ions are doped in the glass substrate, and the light absorption characteristic of the Ce < 3 + > ions in a narrow band gap is utilized, so that the problem of low laser energy absorption efficiency caused by the wide band gap characteristic of the traditional glass substrate is effectively improved, and the energy absorption efficiency of the glass substrate to laser is remarkably improved, which means that the energy absorption efficiency of the glass substrate to laser is greatly improved under the same processing effect. The required laser energy can be greatly reduced, the dependence of a laser processing system on a high-power laser is reduced, thermal damage is greatly reduced, the problems of fusion, microcracks, thermal stress and the like caused by traditional high-intensity laser are avoided, and excessive loss of energy is also avoided.

The present invention discloses a method for synthesizing a quasi-two-dimensional perovskite microcavity, including three parts: preparation of a quasi-two-dimensional perovskite precursor solution, spin coating of the precursor solution, and sample annealing. Specifically, it includes: preparing a solution containing an organic ligand, lead bromide, and cesium bromide as a material for preparing a quasi-two-dimensional perovskite microcavity; spin coating the precursor solution on a quartz glass substrate in air through a sizing machine; annealing the spin-coated sample at high temperature in air to promote the growth of the quasi-two-dimensional perovskite microcavity. The present invention provides a novel self-assembled quasi-two-dimensional perovskite microcavity and application, which realizes a narrow linewidth laser lasing wavelength. Its small wavelength and high-intensity laser lasing wavelength contributes to the in-depth research of perovskite light-emitting microcavities. The present invention has broad application prospects.

The utility model relates to a reactor system, a laser generation system and a fusion reactor system for space application. The reactor system comprises a reactor, at least one satellite system, an optical cavity, an optical path modifying device, at least one pair of reflecting mirror devices, a timing device and a space driving device. The present disclosure provides a fusion energy system configured with a high intensity pulsed laser system in a compact and spatially efficient system; the high-intensity pulse laser system provides enough energy to ignite and maintain fusion energy configured in space application; the present disclosure provides the advantage of using this high intensity laser in space to produce fusion energy through efficient size, weight and cost.

The utility model discloses an antimonene diaphragm type laser protective goggles which comprise a goggles frame which is a detachable frame, and a clamping groove is annularly formed in the inner side of the goggles frame. The glasses legs are movably connected to the edges of the two sides of the glasses frame; the lenses are provided with light limiting antimonene layers, the lenses are embedded in the clamping grooves, the novel glasses are simple in structure and convenient to use, the glasses frame can be freely detached, and the glasses legs can be freely adjusted. The novel thin film with nonlinear optical laser protection can absorb most of high-intensity laser and can effectively protect glasses or detectors through low-intensity laser.

To provide a cutting method capable of accurately cutting at a high speed with a minimum thermal effect by using a laser beam.SOLUTION: The method for dividing the raw sheet 1 uses a hybrid double-core laser L. A raw material 1 in which an active material layer 2 is coated on at least one surface of a long metal foil 4 is conveyed in one direction. A double core laser L constituted of a high intensity laser Lf at the center part and a preheating laser Ly surrounding the periphery of the high intensity laser Lf and preheating the periphery of the irradiation point P with lower intensity than that of the high intensity laser Lf is irradiated in a pulse state. A perforated hole 1h is formed in a raw sheet 1 in the longitudinal direction. On the downstream side separated from the irradiating point P, the raw sheet 1 is torn up and down along the row of the hole 1h with the perforated hole 1h as a starting point.SELECTED DRAWING: Figure 1

The invention relates to the technical field of welding wires, in particular to a 785MPa-grade high-toughness laser-arc hybrid welding solid welding wire and a design method thereof.The 785MPa-grade high-toughness laser-arc hybrid welding solid welding wire is characterized in that 3.5%-5.5% of Ni and 0.5%-0.8% of Mo are added into welding wire alloy, and a large number of autocatalytic nucleation is induced to be generated, so that deposited metal forms an interlaced lath bainite structure; the contents of key alloy elements such as C, Mn, Ni and Mo are cooperatively regulated and controlled, so that the structure embrittlement tendency caused by steep rising and falling heat circulation in the laser-electric arc hybrid welding process is effectively controlled, a fine grain structure mainly comprising interlaced lath bainite is obtained, structure refinement is effectively achieved in deposited metal, and the welding quality is improved. Therefore, the alloy still has excellent impact toughness (KV2 reaches 91-100 J) in a low-temperature environment of-50 DEG C, the technical problem that high-strength laser-arc hybrid welding deposited metal is insufficient in toughness under extreme working conditions is solved, the safety of a welding structure is improved, the service life of the welding structure is prolonged, and upgrading of a maritime work equipment construction process is promoted.

The utility model discloses a particle detection device which comprises a detection cavity, an air inlet nozzle and an air outlet nozzle which are arranged on the detection cavity, a light source assembly capable of providing light focused at the central position of the detection cavity, a first reflecting mirror, a second reflecting mirror, a light collecting reflecting mirror and a light receiving lens, a gas path formed between the gas inlet nozzle and the gas outlet nozzle passes through the central position of the detection cavity; the particle detection device disclosed by the utility model adopts the reflecting mirror to reflect laser rays in the cavity for multiple times, and a high-intensity laser area is formed at the intersection of a light path and a gas path, so that the detection precision and sensitivity are improved, and the design can greatly reduce the power of laser equipment, reduce the volume of a light source, reduce the power consumption of the light source and reduce the overall volume of a sensor; the overall performance of the sensor is improved, miniaturization of equipment is facilitated, and high-precision detection can be carried out on small particles.

A device (11) for transmitting pulsed laser radiation having a pulse energy that results in a high-intensity laser pulse (3C) with a compressed pulse duration comprises a pulse duration setting device (13), a hollow-core fiber (1), and a fiber coupling input device (17). The pulse duration setting device is configured to receive the pulsed laser radiation and to set the transmission pulse duration (Δt_t) of the laser radiation. The hollow-core fiber has a hollow core (4A) surrounded by a material (4B), wherein the hollow-core fiber (1) transmits a laser pulse (3B) coupled into the first fiber end (1A) in the hollow core (4A) to a second fiber end (1B) and outputs the laser pulse at the second fiber end. The hollow-core fiber (1) is configured to operate with a beam trajectory parameter value (X, α) present at the first fiber end (1A), the beam trajectory parameter value being within a target tolerance range (ΔX_S). The fiber coupling device is configured to receive laser radiation set to the transmission pulse duration (Δt_t) and couple the laser radiation into the hollow core fiber (1) with a beam trajectory parameter value (X, α), the beam trajectory parameter value being within the target tolerance range (ΔX_S). The transmission pulse duration (Δt_t) is set in such a way that for all beam trajectory parameter values (X, α) within the target tolerance range (ΔX_S), the laser radiation is coupled into the hollow core (4A) in such a way that the material and / or structure (37) of the hollow core fiber (1) is retained during the coupling.

The invention relates to a preparation method of a solar cell and the solar cell. The method comprises the following steps: printing a grid line on a silicon wafer, and sintering to obtain a battery piece; dividing the battery piece into more than two small battery pieces; carrying out passivation treatment on the small battery piece to form a passivation film; and carrying out laser-assisted sintering treatment on the passivated small battery piece. The laser-assisted sintering process is arranged after the passivation process, so that the problem of temperature tolerance of the metal grid line can be solved, different passivation technologies can be applied, a covering film layer on the metal grid line can be burnt through by high-intensity laser, and assembly welding is facilitated.

The invention belongs to the technical field of new energy lithium ion battery manufacturing, particularly relates to a surface pretreatment mode for battery welding, and aims to solve the problem that the existing current large cylindrical battery has many welding procedures including negative electrode collector plate welding, positive electrode collector plate welding, penetration welding, sealing nail welding and cover plate circumference welding. The number of welding procedures is large, the process yield is low, efficiency is low, and cost is high. Laser welding is high in base metal welding requirement and free of foreign matter and impurities. The method comprises the following steps that a welding system is composed of ultrafast pulse laser, a beam shaping device and a high-speed scanning galvanometer; the method comprises the steps that S1, a beam of ultrafast pulse laser is provided, the pulse width is smaller than 10 ns, and the repetition pulse frequency is larger than 200 KHZ; and S2, the ultrafast pulse laser is incident to a beam shaping device, a large number of organic foreign matter generated by electrolyte crystallization can be removed on the basis of high-intensity laser shock, and hole explosion, splashing and other defects occurring in the laser welding process are reduced.

The present invention relates to a highly transparent retro-reflective sheet for achieving broad-spectrum light reflection in applications such as cryogenic storage, high-intensity laser systems, and directed energy weapon (DEW) shielding. The highly transparent retro-reflective sheet comprises a sheet body, an optical structure surface and a reflecting surface. The highly transparent retro-reflective sheet is capable of broad-spectrum light reflection with minimal absorption for maximum efficiency, and is able to withstand high-powered laser beams without damage. The highly transparent retro-reflective sheet is disposed on objects to reflect away light or radiation directed towards the objects, thereby enabling the highly transparent retro-reflective sheet to be applicable for diverse applications such as space-based cryogen storage, superior reflective layers for vacuum insulation, high-intensity laser beam reflectors for beam-propelled space travel, and optical and infrared shielding from directed energy weapons (DEW).

Method for manufacturing a valuable or secure product (100), comprising the steps: - Providing a core layer (102) of the value or security product (100), - Applying at least one laser-compatible foil layer (106) to the core layer (102) or to one or more polymer layers (104) applied to the core layer (102), - Incorporating person-specific and / or product-specific non-tactilely detectable information (108) into the laser-compatible foil layer (106) using a low-intensity laser beam, and - Forming person-specific and / or product-specific information in the form of at least one tactilely detectable Braille character (110) with a high-intensity laser beam which is higher than the low intensity, wherein a cover layer which is only partially opaque is applied to the laser-capable foil layer (106), and wherein the cover layer is opaque at least in one of the places where a blackening has been introduced into the underlying laser-capable foil layer (106) by the laser beam.

The invention discloses a particle detection device and method. The detection device comprises a detection cavity, an air inlet nozzle and an air outlet nozzle which are arranged on the detection cavity, a light source assembly capable of providing light focused at the center position of the detection cavity, a first reflecting mirror, a second reflecting mirror, a light collecting reflecting mirror and a light receiving lens, a gas path formed between the gas inlet nozzle and the gas outlet nozzle passes through the central position of the detection cavity; according to the particle detection device, the reflector is adopted to reflect laser light in the cavity for multiple times, and a high-intensity laser area is formed at the intersection of a light path and a gas path, so that the detection precision and sensitivity are improved, and the design can greatly reduce the power of laser equipment, reduce the size of a light source, reduce the power consumption of the light source and reduce the overall size of a sensor; the overall performance of the sensor is improved, miniaturization of equipment is facilitated, and high-precision detection can be carried out on small particles.

The utility model discloses a high intensity laser machine lathe bed, including lathe bed, separating cabin, chip collecting cabin, the separating cabin is provided in the lathe bed, the one side of separating cabin is equipped with the control motor, the output end of the control motor is firmly connected with the screw rod, the surface of the screw rod is in threaded connection with the ball sliding sleeve, one side of the ball sliding sleeve is connected with the sliding block, the other side of the ball sliding sleeve is connected with the chip collecting cabin, and the chip collecting cabin is equipped with the chip collecting cabin. A sliding block is arranged in the separation bin, a brush is connected to the bottom of the sliding block, conveying openings are formed in the two sides of the interior of the separation bin, the conveying openings are communicated and connected with a scrap collecting bin, a hydraulic cylinder is installed on the scrap collecting bin, and the output end of the hydraulic cylinder is fixedly connected with a pressing plate. Large-particle chippings enter the chipping collecting bin, the chipping collecting practicability is improved, the hydraulic cylinder is started to drive the pressing plate to press and pretreat the large-particle chippings, the collecting space in the chipping collecting bin is enlarged, and follow-up treatment of the large-particle chippings is facilitated.

A lamp with a steerable beam, suitable for use as a vehicle headlight, includes a phosphor converter that emits white light from a location impinged by light from a laser, and at least one projection lens for transmitting the white light emitted from the phosphor converter in as a beam in a direction dependent on the location of emission from the phosphor converter. There is at least one high intensity laser; and at least one multi-stage, bi-axial liquid crystal polarization grating for directing laser light from the at least one high intensity laser to a selectable location on the phosphor converter to change the direction of the beam emitted from the light.

The utility model relates to the field of feed quality detection, in particular to an automatic measuring device for powder content and pulverization rate of pellet feed, which adopts the technical scheme that the automatic measuring device for the powder content and the pulverization rate of the pellet feed comprises a storage tower, a tower bottom support frame, a base, a numerical control computer, a vibration motor, a resistance sensor, a filter screen plate and a laser particle size analyzer, the lower end of the upper detection cylinder is provided with a lower detection cylinder in a threaded manner, and the outer wall of the upper detection cylinder is fixedly connected with vibrating motors which are in bilateral symmetry. High-intensity laser emitted by the laser particle size analyzer can detect the light scattering characteristics of the pellet feed and feed dust, the proportion of powder to particles is analyzed according to the light scattering intensity, and the filtered pellet feed is weighed in cooperation with the micro electronic scale, so that the powder content and pulverization rate of the pellet feed are accurately detected.

The utility model relates to the technical field of accurate positioning of lifting hooks, in particular to an accurate positioning device of a tower crane lifting hook, which comprises a tower crane structure, the tower crane structure comprises a main body frame, a jacking sleeve section, a tower cap, a rear arm, a front arm, a lifting lifting hook, a detection positioning structure and a control room, and the detection positioning structure comprises a sliding toothed rail and a fixed sliding seat arranged below the sliding toothed rail. The driving motors are symmetrically installed on the two sides of the fixed sliding base, the sliding gears are arranged at the output ends of the driving motors and clamped and embedded in the sliding toothed rail in a meshed mode, the cameras are symmetrically arranged on the lower surface of the fixed sliding base, the high-intensity laser spotlight is arranged between the two cameras, and a receiving block is arranged on the lifting hook. According to the utility model, the detection positioning structure and the receiving block are matched with each other, so that a target site can be accurately positioned in advance when goods are hoisted, and cooperation command of multiple persons is not needed, so that the transportation efficiency is improved, the labor cost is reduced, and convenience can be better provided for operators.

The laser produced plasma light source comprises a vacuum chamber (1), a rotating target assembly (2) which delivers a target (3) to an interaction zone (4) together with a focused laser beam (5). The target is a layer of molten metal on the surface of an annular groove in the target assembly. An output beam of short wavelength radiation (7) leaves the interaction zone via debris mitigation means to a light collector (8). The linear velocity of the target is preferably greater than 100 m / s, and the vector of the linear velocity of the target in the interaction zone is directed to one side of a plane (18) passing through the interaction zone and the axis of rotation (6), and the focused laser beam and the output beam are positioned on the other side of said plane.

The invention discloses a semiconductor saturable absorber mirror packaging structure and method integrated with an optical limiting material. Comprising a heat sink, a semiconductor saturable absorber mirror and an optical limiting material composite layer, a step-shaped groove is formed in the top surface of the heat sink, a semiconductor saturable absorber mirror and an optical limiting material composite layer are sequentially arranged in the step-shaped groove from bottom to top, and the top surface of the optical limiting material composite layer is flush with the top surface of the heat sink; the optical limiting material composite layer comprises a transparent substrate and an optical limiting material film layer, and the optical limiting material film layer is in contact with the top surface of the semiconductor saturable absorption mirror; the stepped groove is formed by two orthogonal grooves, and the two grooves are respectively a first groove used for arranging a semiconductor saturable absorber mirror and a second groove used for arranging an optical limiting material composite layer. By integrating the optical amplitude limiting material with the nonlinear absorption characteristic, high-intensity laser is effectively limited, and damage to the semiconductor saturable absorber mirror is reduced.

The application discloses a device for realizing in-situ measurement of time-domain waveforms of ultrahigh-intensity laser pulses, which comprises a component to be measured, wherein the component to be measured comprises a femtosecond laser source, a beam splitter arranged on one side of the femtosecond laser source, a mirror component arranged on one side of the beam splitter, a first focusing lens arranged on one side of the mirror component, a vacuum component arranged on one side of the first focusing lens, a dual-color mirror arranged on one side of the vacuum component, a narrow-band filter arranged on one side of the dual-color mirror, a 10cm focusing lens arranged on one side of the narrow-band filter and a spectrometer; and a detection component, wherein the detection component comprises a mirror, a second focusing lens arranged on one side of the mirror and a time-delay device mounted on an electrically-controlled displacement table. According to the application, the limitation of traditional equipment in terms of damage threshold can be broken, only a common spectrometer is needed to record optical frequency domain information, the method is simple, the cost is low and the applicability is wide.