74results about How to "Improve laser utilization" patented technology

The invention discloses an electromagnetic current coupling field assisted hybrid melting-brazing method for a laser-TIG arc and equipment. In addition to the use of the welding zone, an alternating magnetic field is added to control properties of plasma formed through ionization of laser, arc and a raw material metal, thereby improving the laser utilization rate. Under the electric field assisted comprehensive effect, the weld melting depth is increased, and the assistant effect on the melting bath of the liquid-state brazing filler metal for laser-arc melting-brazing is realized through electromagnetic stirring and excitation and enhancement, thereby promoting the orderly flow of the liquid-state brazing filler metal and the rupture, wetting, spreading and proliferation of the liquid-state brazing filler metal on the surface of the high metal material, improving the full mixing of the liquid-state brazing filler metal and the base metal formed by melting the low-melting-point metal material, improving the uniformity of the components of the brazed weld, stabilizing the welding process, reducing welding defects, increasing the welding speed, improving the weld formation, optimizing the structure and performance of the brazed weld, and improving the quality of the brazed joint. Moreover, the equipment has the advantages of simple structure, flexible application, low cost, good effect and easy realization.

The present invention discloses a laser light source and a projection display device. The laser light source comprises a laser array at least sending out the first blue polarized light and the third blue polarized light, a reflective fluorescent wheel, a 1/4 wave plate, a reflector and a polarized dichroic assembly arranged between the laser array and the reflective fluorescent wheel, wherein the reflective fluorescent wheel is equipped with a fluorescence reflection area, the 1/4 wave plate receives the first blue polarized light reflected by the polarized dichroic assembly, converts the first blue polarized light into the second blue polarized light, also receives the second blue polarized light reflected by the reflector and converts the second blue polarized light into the third blue polarized light, and the polarized dichroic assembly transmits the third blue polarized light coming from the 1/4 wave plate and the laser array and reflects the fluorescence generated when the third blue polarized light coming from the laser array irradiates the fluorescence reflection area. The laser light source is few in optical assemblies, and enables the laser loss to be reduced substantially and the laser utilization rate to be improved substantially.

The invention relates to a laser TIG arc coaxial hybrid welding method with an additional high frequency magnetic field and a device. The method includes firstly connecting positive and negative poles of a TIG welding machine to a workpiece and a tungsten electrode respectively, then connecting an exciting power output end to a field coil, connecting the field coil with a laser TIG composite welding head through a composite welding head connecting device, and determining a welding running path; and opening an exciting power supply to supply power for the field coil; opening shielding gas for welding and observing the weld seam formation condition. The method and the device have the advantages that the arc pneumatic pressure and the arc current density are effectively improved, so that the arc heat distribution is concentrated, the arc radius is compressed, the arc energy density and the arc stiffness are further improved, the stability of the welding arc in a laser arc composite welding process is improved, the coaxial composite degree of the laser and the arc during laser TIG arc composite coaxial welding is quite facilitated, and wide markets and application prospects are provided.

The invention relates to the technical field of laser speckle elimination, in particular to a shimming decoherence device based on a rotation reflecting surface and a scatterer. The problem that the existing laser speckle elimination device is poor in speckle elimination effect and image blurring can be caused easily is solved. The shimming decoherence device based on the rotation reflecting surface and the scatterer comprises a decoherence mechanism (1). The decoherence mechanism (1) comprises a motor (101), a reflector (102), a connecting piece (103) and the transparent scatterer (104). The reflector (102) and the scatterer (104) are fixed on two sides of the connecting piece (103) respectively, and an output shaft of the motor (101) is fixedly connected with the back of the reflector (102). A converging lens (2) and a light pipe (3) with a shimming function are sequentially arranged on an output optical path of the decoherence mechanism (1). The shimming decoherence device is reasonable in design and simple in structure and effectively eliminates the laser speckles.

The invention relates to a connecting method, in particular to a connecting method assisted by electro-magnetic induction synchronous preheating and based on laser additive manufacturing. The problems that Ti-Al system intermetallic compound materials, high-temperature alloy, aluminum alloy and the like are sensitive to laser welding cracks, materials serious in laser reflection are prone to defects like cracks during welding, and the laser utilization rate is small are solved. The method includes the steps that a workpiece to be welded is machined, ground and cleaned; process parameters are set, and welding is carried out. An electro-magnetic induction coil serves as a preheating heat source, the crack sensitivity tendency of the materials in the welding process is relieved, the defects that the materials are low in laser adsorption rate, large in energy consumption in the welding process and the like are effectively relieved, and the laser utilization rate is improved. Meanwhile, the welding joint and peripheral materials are heated in an induction mode, the temperature gradient of the area around the welding joint in the welding process is reduced, the micro structure after welding can be effectively improved, and the performance of a welding connector is improved.

The invention provides a continuous rapid laser coating method of a superconducting layer in a second-generation high-temperature superconducting strip. According to the invention, through a method of bi-dimensionally scanning a superconducting target along an x-y axle, the whole surface of the target can be utilized and a laser evaporation coating process can be stably and sustainably carried out; coating intervals are increased through a method of scanning along the motion direction of the strip by use of laser spots; and the width of the coating interval vertical to the motion direction of the strip is increased through a method of twining the strip on a belt roller above a heater multiple times. By using the method provided by the invention, evaporated substances are fully collected on a metal base band to the greatest extend, thereby effectively improving the preparation speed of the strip, increasing the utilization rates of the target and the evaporated substances, greatly improving the production efficiency and reducing the production cost of the strip. According to the method provided by the invention, the rapid coating of the second-generation high-temperature superconducting strip suitable for large-scale industrial production can be realized.

The invention provides an opposite front light-in high-power photoconductive switch device and a making method thereof. The opposite front light-in high-power photoconductive switch device includes a hollow metal electrode, a metal ring, an antireflection passivation layer, a transparent conductive layer, a high-resistance semiconductor, a high-reflectivity electrode, and a solid metal electrode. The transparent conductive layer and the antireflection passivation layer are arranged in sequence on the high-resistance semiconductor used as a substrate, and the metal ring surrounding and connected around the transparent conductive layer and the antireflection passivation layer is also arranged on the high-resistance semiconductor. The side of the metal ring opposite to the substrate is connected with the hollow metal electrode. The high-reflectivity electrode is arranged on the back of the high-resistance semiconductor. The side of the high-reflectivity electrode opposite to the substrate is connected with the solid metal electrode. The device is packaged with a dielectric material with high breakdown field strength. Edge breakdown caused by uneven carriers can be avoided, and the withstand voltage and light efficiency of the switch can be greatly improved.

The embodiment of the invention provides a display panel and a display device and relates to the technical field of display, aiming at preventing a packaging adhesive from being in contact with firstcushion layer metal and improving the packaging effect of the display panel. The display panel comprises a display region, a non-display region, a first substrate and a second substrate, wherein the non-display region is arranged around the display region; the first substrate and the second substrate are arranged oppositely; the non-display region comprises a glass material packaging region; the glass material packaging region comprises the first cushion layer metal; the first cushion layer metal is located at one side, back on to the second substrate, of the first substrate.

The invention provides a laser beam shimming and speckle inhibiting device. The device comprises a collimating lens, a diffusion sheet, a condenser and a fly's-eye lens. The light dodging effect of the fly's-eye lens is used, the fly's-eye lens is divided into four identical areas, the collimating lens and the diffusion sheet are used to receive, expand and collimate a laser beam, then the laser beam is input to the fly's-eye lens in two rows for light dodging shaping, and later the laser beam is incident to an X light splitter for light splitting projection. According to the structure, the laser beam is reasonably divided into four light paths, and the defect that the X light splitter forms dark stripes at the center of a picture screen in a projection system is reasonably compensated. The device has the advantages of being simple in structure, stable in operation, good in image screen display effect, uniform in light field and the like, and can be applied to the technical field of lighting or displaying by taking coherent light as a light source.

The invention relates to the technical field of displaying by taking coherent light as a light source, and in particular relates to a speckle elimination device based on Mie scattering and Brownian motion, aiming at solving the problems of poor speckle elimination effect, complex implementation structure, high possibility of damage, high cost and the like existing in the existing speckle elimination method. The speckle elimination device based on Mie scattering and Brownian motion comprises a sealed optical reflecting cavity provided with an incident light coupling device and a transmission and emergence surface; all the inner walls of the sealed optical reflecting cavity, except the inner walls of the transmission and emergence surface, are mirror surface inner walls; the sealed optical reflecting cavity is fully filled with a solution or a sol; and insulating particles which are in proper dimension to lead to the Mie scattering of incident laser are scattered in the solution or sol. The speckle elimination device based on Mie scattering and Brownian motion has the advantages of simple and compact structure, low manufacturing cost, good speckle elimination effect, high laser utilization ratio, stable performance and light uniformizing function, is easy to implement and is safe and reliable.

The invention relates to a laser-TIG (Tungsten Inert Gas) arc rangefinder hybrid welding method with the addition of a high frequency magnetic field. The method comprises the steps of: 1) first, respectively connecting anode and cathode of a TIG welding machine to a workpiece and a welding gun, and then, connecting an exciting power supply output end to an exciting coil, and clamping the welding gun on a welding gun clamping mechanism of a hybrid welding head to determine a welding travel path; 2) opening an exciting power supply to supply power to the exciting coil; and 3) opening a protective gas to weld and observing formation of weld. Compared with the prior art, the laser-TIG arc rangefinder hybrid welding method with the addition of the high frequency magnetic field provided by the invention has the beneficial effects that as the high frequency magnetic field is added, the pneumatic pressure and the electric current density of arc are effectively improved, so that the arc heat is distributed more centralized and the arc radius is reduced, therefore, the arc energy density and arc deflection are further improved. Improvement of the arc energy density and reduction of radius of an arc column of the arc are very beneficial for enhancing the stable combustion capacity and impacting penetration capacity of the arc during laser-TIG arc rangefinder hybrid welding.

The invention provides a laser cladding device capable of recycling and reusing reflected light. The laser cladding device capable of recycling and reusing reflected light comprises a reflecting cover, a laser head inner wall and a laser head outer wall, wherein the inner wall of the laser head is arranged inside the outer wall of the laser head, a laser beam channel used for transmitting a laserbeam is formed inside the inner wall of the laser head, a powder beam used for transmitting a powder beam is formed between the out wall of the laser head and the inner wall of the laser head, the laser beam passes through the laser beam channel and then is focused on the surface of a to-be-machined workpiece, the powder beam is focused on the surface of the to-be-machined workpiece after passingthrough the powder beam channel, the laser beam and the powder beam are focused on the same point on the surface of the to-be-machined workpiece, and a reflecting cover can reflect the laser reflectedby the surface of the to-be-machined workpiece back to the joint focus point where the laser beam and the powder beam located on the surface of to-be-machined the workpiece. According to the laser cladding device, a reflected light recycling and reusing mechanism and related cooling mechanism are arranged, so that the damage of the reflected laser to equipment and a human body is reduced, the laser utilization efficiency is improved, and the development bottleneck of an existing laser cladding technology is solved.

The invention relates to the technical field of display which takes coherent light as a light source, in particular to a Mie scattering and field-induced deformation polymers-based speckle eliminating device, and solves the problems that a speckle effect is poor, a realization structure is complex, the device is easy to damage, the cost is high and the like in a conventional speckle eliminating method. The device comprises an optical reflection cavity on which an incident light coupling device and a transmission exit surface are arranged; the inner wall, besides the inner wall of the transmission exit surface, of the optical reflection cavity is the inner wall of a mirror surface; a transparent solid substance filling the overall optical reflection cavity is arranged in the optical reflection cavity; medium particles of which the dimension can cause the Mie scattering of an incident laser are dispersed in the transparent solid substance, wherein the transparent solid substance is a field-induced deformation polymer; and the optical reflection cavity is matched with an actuating device which is used for generating an external field required by the polymer in the cavity. The device is easy to implement, along with a reasonable and compact structure, a good speckle eliminating effect, low cost, high laser utilization rate, stable performance, safety, reliability and light homogenizing function.

The invention belongs to the technical field of optical instruments and meters, and discloses an exposure beam phase measurement method in laser interference lithography. The method comprises the steps: separating measuring light from an exposure light beam of laser interference lithography and inputting the measuring light into a laser phase measuring interferometer to carry out phase measurementon the exposure light beam of laser interference lithography; and introducing a reference light beam homologous with the laser interference lithography exposure light beam, inputting the reference light beam into the laser phase measuring interferometer, processing the reference light beam by the laser phase measuring interferometer to form an interference measurement light signal, and performingresolving to obtain the phase of the laser interference lithography exposure light beam. The invention discloses a laser interference lithography system. The system comprises the laser phase measurement interferometer, a controller and a phase modulator; the system adopts the exposure light beam phase measurement method in laser interference lithography, and the laser phase measurement interferometer is used for measuring whether the phase of the exposure light beam drifts or not; the controller controls the phase modulator to carry out phase modulation, the locking of exposure fringe phase drift is completed, and the manufacturing of a high-precision variable-period grating is achieved.

The invention discloses a skylight splicing and welding machine. A feeding mechanism and a portal frame are included. The feeding mechanism is provided with a workpiece positioning workbench. The feeding mechanism is provided with a feeding and discharging station and a welding station. The feeding mechanism drives the workpiece positioning workbench to move between the feeding and discharging station and the welding station. The portal frame comprises a gantry base, a gantry drive mechanism and at least two portal frame bodies. The gantry drive mechanism is arranged on the gantry base and drives the portal frame bodies to move. Each portal frame body is provided with a robot moving mechanism and a welding robot, wherein the robot moving mechanism drives the welding robot to move. The multi-pass welding technology is utilized in the scheme so that the high-linkage-degree welding work process can be achieved, and the work efficiency is greatly improved; and various walking mechanisms, workpiece positioning tool and welding line walking direction tracking mechanisms and other mechanisms are optimized, the running and work process of the whole machine is more intelligent, and the work efficiency and the machining precision are further improved.

The invention relates to a plate welding method adopting laser penetration. A laser welding head, a high-pressure gas column nozzle and a protective gas spraying pipe can move relative to base materials, when the temperature of the back surfaces of the base materials reaches or exceeds a gasification temperature value of the base materials, the laser welding head and the high-pressure gas column nozzle are rotated, so that the laser welding head is inclined relative to the upper surfaces of the base materials, and the high-pressure gas column nozzle is in vertical alignment with the upper surfaces of the base materials; and a gas supply valve of the high-pressure gas column nozzle is controlled so that inert gas columns can be sprayed by the high-pressure gas column nozzle to penetrate through welding keyholes. The invention further relates to a laser welding system, and the laser welding head and the high-pressure gas column nozzle can move relative to the base materials so that the laser welding head and the high-pressure gas column nozzle can be switched between a first state and a second state. According to the plate welding method adopting laser penetration, high-pressure superfine gas columns are adopted to assist in maintaining the keyholes, so that discontinuous penetration of the keyholes and the loss of laser energy overflow in the penetration welding process are avoided, and the stability of the keyholes and the energy utilization rate are improved.

The invention belongs to the technical field of optical instruments and meters, and provides a phase measuring device for a laser interference photoetching system and a using method thereof. The phasemeasuring device comprises a first wave plate, a first polarization splitting prism, a fourth wave plate, a backward reflecting mirror, a third wave plate, a reflecting mirror, a second wave plate, apolarizing film, a second polarization splitting prism, a third polarization splitting prism, a first photoelectric detector, a second photoelectric detector and a base, wherein the first polarization splitting prism, the second polarization splitting prism, the third polarization splitting prism, the first photoelectric detector and the second photoelectric detector are fixed on the base; the first wave plate, the second wave plate, the third wave plate and the fourth wave plate are respectively arranged around the first polarization splitting prism; the polarizing film and the emergent surface of the third polarization splitting prism, the backward reflecting mirror outside the fourth wave plate, and the reflecting mirror outside the third wave plate form a light path system for phase measurement. An interference measurement signal is resolved to obtain a measurement light phase, and the device and the method are used for fringe control of variable-period interference exposure.

The invention provides a silicon optical chip and a laser radar system. The silicon optical chip comprises a first coupler and a second coupler, wherein the first coupler is used for receiving multiple paths of incident light from an external light source and coupling the multiple paths of incident light into first single-path transmission light; and the second coupler is used for receiving one part of the first single-path transmission light, splitting one part of the first single-path transmission light into multiple paths of emergent light and transmitting the emergent light to an externaldetection device. According to the silicon optical chip and the laser radar system, the laser transmission efficiency can be improved.

The invention relates to an echo wall mode organic special-shaped resonant cavity and a preparation method and application thereof, and belongs to the field of optical devices. The preparation methodcomprises the following steps of dissolving organic semiconductor molecules in an organic good solvent to obtain an organic semiconductor solution; adding a poor solvent and an organic semiconductor solution into a container, wherein the organic semiconductor solution is not in contact with the poor solvent and is located above the poor solvent; covering the container with a cover, so that the container is not completely sealed, and after the solvent volatilizes, the echo wall mode organic special-shaped resonant cavity is obtained. The preparation method is simple and easy to implement, the spindle-like resonant cavity with the perfect boundary and the ultra-smooth surface is obtained, the resonant cavity is good in crystallinity and is free of impurities and optical defects, the couplingoutput loss of light can be effectively reduced, and the purpose that the resonant cavity has a high-quality factor is achieved.

The invention relates to the technical field of display by the adoption of coherent light as a light source, in particular to a speckle eliminator based on Mie scattering and magnetic control particle motion, which solves the problems of poor speckle elimination effect, complex implementation structure, easiness of damage, high cost and the like in the traditional speckle elimination method. The speckle eliminator based on Mie scattering and magnetic control particle motion comprises an enclosed type optical reflection cavity, wherein an incident light coupler and a transmitted and emergent surface are arranged on the enclosed type optical reflection cavity; the inner wall of the enclosed type optical reflection cavity, except from the inner wall of the transmitted and emergent surface, is a mirror surface inner wall; a solution or sol is filled into the enclosed type optical reflection cavity; magnetic medium particles the sizes of which can enable incident laser to generate Mie scattering are distributed in the solution or the sol; the enclosed type optical reflection cavity is provided with a magnetic field generator for generating a magnetic field; and an electromagnet of the magnetic field generator is arranged outside the enclosed type optical reflection cavity. The speckle eliminator based on Mie scattering and magnetic control particle motion has the advantages of reasonable and compact structure, easiness of implementation, low cost, good speckle elimination effect, high laser utilization rate, stable performance, safety and reliability, and dodging function.