391 results about "Carbon dioxide laser" patented technology

A carbon dioxide laser is used as a non-mechanical means for smoothing and polishing the as-cut chamfer surface at the edge of the disk. Applying laser radiation to the glass surface causes transient melting and resolidification. Due to surface tension effects, the glass resolidifies to produce a surface that is significantly smoother than it was before irradiation. If scratches or abrasive marks are present on the glass surface prior to irradiation, the irradiation process "polishes out" these defects as long as they are not too deep. At a wavelength near 10 mum, the penetration depth of the radiation into the glass is approximately 1 mum. Therefore, scratches and defects of this order of magnitude are eliminated. The quality of the resulting modified chamfer surface is far superior to the original mechanically ground and polished surface.

Drilling method of carbon dioxide laser includes steps: preparing locating point on layer next to the outer layer; before pressfitting added layer, browning oxidizing surface of target bonding pad; after pressfitting added layer, milling location hole / polishing edge, washing surface under high pressure; browning front surface of copper, thinning and coursing the surface before drilling hole by layer; first time to drill hole by laser; positioning film perforation by using plate location hole in original etching method for making window of copper, burning through copper foil and resin above the locating point on layer next to the outer layer so as to expose the locating point; second time to drill hole by laser; using the exposed locating point as position fixing to make micro hole inplate; washing surface under high pressure to remove browning layer after drill hole. The invention saves dry film and etching liquid, and raises process precision.

A machine for detecting sulfur hexafluoride (SF6) leaks using the mid-infrared differential absorption lidar (DIAL) technique with a commercically available, air-cooled, compact, pulsed transversely-excited-atmospheric (TEA) carbon dioxide (CO.sub.2) laser, a Cassegranian optical telescope for focusing both the laser emission and returning reflected signal, a user-operated focusing mechanism, a two-dimensional, thermoelectrically-cooled focal plane array (FPA) sensitive in the mid-infrared wavelength range (10.2-10.6 micrometers), a charge-coupled device (CCD) for 2-D imaging, a computer-based control system to rapidly switch the laser wavelength between 10.2470 micrometers, 10.7415 micrometers, and 10.5518 micrometers to utilize the Differential Absorption Lidar (DIAL) chemical detection technique, a rechargeable battery pack and power supply, and an image and data storage device using a solid-state memory stick.

The invention belongs to the technical field of optical fiber sensing, and relates to an optical fiber F-P (Fabry-Perot) cavity pressure sensor with temperature self compensation. The F-P cavity pressure sensor with temperature self compensation adopts an optical fiber with an optical grating as a transmission optical fiber and adopts an optical F-P cavity as a pressure sensitive element, wherein the F-P cavity sensitive element is a non-intrinsic optical fiber F-P cavity, and the optical fiber gating and the optical F-P cavity are connected in a mode of glue bonding or carbon dioxide laser welding. According to the mode of pressure sensing, the sensor is divided into side pressure type optical fiber F-P cavity pressure sensors with temperature self compensation and end pressure type optical fiber F-P cavity pressure sensors with temperature self compensation.

A cut deal laser inherent stress composite peen forming features in the clipper using robot, using carbon dioxide to realize the basic formation, profile measuring feedback system controlling the deformation quantity, left stress meter measuring the surface stress of the board, optical scanning the pre formation, realizing board through model analog software, getting optimized process parameter instructing laser consecutive peen formation, using neodymium glass laser providing short pulse strong laser light, laser impact wave as the force source of precise forming, using the profile feedback device and on line measuring board surface stress left stress to control the deformation quantity to realize precision forming with complex shapes.

A copper-clad board suitable for making a hole with a carbon dioxide gas laser, which copper-clad board is obtained by disposing a double-side-treated copper foil provided with a metallic-treatment layer having a high absorption rate of a carbon dioxide gas laser energy on at least one surface, at least on an outer layer of a thermosetting resin composition layer such that the metallic-treatment layer is formed on a shiny surface of the copper foil which shiny surface is to be a surface layer, and laminate-forming the double-side-treated copper foil and the thermosetting resin composition layer under heat and pressure, to make an alloy of the metallic-treatment layer and the copper by the above heating, a method of making hole in the above copper-clad board and a printed wiring board comprising the above copper-clad board.

The invention discloses a dual selective laser sintering and nonmetal and metal melting 3D (three-dimensional) printing system which comprises two laser scanning devices, a main powder spreading device and a control device. The 3D printing system is characterized by further comprising an auxiliary powder spreading device integrally connected with the main powder spreading device through a connecting support and positioned in front of the main powder spreading device, the auxiliary powder spreading device and the main powder spreading device horizontally and bidirectionally reciprocate, metal powder and nonmetal powder are placed in the main powder spreading device and the auxiliary powder spreading device respectively, the main powder spreading device spreads a layer of metal powder when moving every time, the auxiliary powder spreading device controlled by the control device quantitatively spreads the nonmetal powder downwards at fixed points, and the spread nonmetal powder can be covered by later spread metal powder. The 3D printing system has the advantages that part forming efficiency can be effectively improved by dual-laser composite scanning, the metal powder is preheated while the nonmetal powder is sintered by carbon dioxide laser, and the defects such as warping and cracking of metal parts can be effectively avoided.

The invention discloses a method for repairing a fused quartz optical damage component, which belongs to the technical field of the optical material and the optical component, in particular to a method for repairing and processing laser damage of a fused quartz optical component. The method comprises the following steps: firstly adopting infrared carbon dioxide laser to carry out laser fusion repair on the damage part of the fused quartz optical damage component; and then carrying out annealing treatment on the fused quartz optical damage component subjected to laser fusion repair. The method can carry out complete repair on the fused quartz optical damage component and eliminate residual stress caused by the laser fusion repairing process. The fused quartz optical component repaired by the method can revert to the state of the ideal fused quartz optical component. And the method also can inhibit the increase of the damage points of the fused quartz optical component. The method can prolong the service life of the fused quartz optical component, greatly reduces operation cost and has the characteristics of strong process controllability, high repetitiveness and stable performance.

A self-magnetically confined lithium plasma that has an applied axial magnetic field is irradiated at sub-critical density by a perpendicularly oriented carbon dioxide laser to generate extreme ultraviolet photons at the wavelength of 13.5 nm with high efficiency, high power and small source size. Lithium reflux is facilitated by ionization, electric field induced drift toward, and capture on surfaces intersected perpendicularly by the applied axial magnetic field.

The related sealing-type CO2 laser tube comprises: a metal-plated full reflection mirror 1, a muffler 2 set in tube 4 to connect sheath 3 and tube 5, a gas storage sheath 3, a water cooling tube 4 set on top of a discharge tube 5 together in sheath 3, an output mirror 6 together with mirror 1 bonded on ends of laser tube ends by epoxy resin, the TiO2 photo catalyst 8 coated on inner wall of tube 5 and electrodes 7/9, and two electrodes 7/9 coaxial arranged on ends of tube 5. This invention is simple and convenient, prolongs product life time, reduces cost, and has well social and economic benefits.

The invention relates to a method for drilling holes on a printed circuit board, comprising the following steps: providing the printed circuit board which comprises a substrate covered by a copper foil which has the thickness of 12-18 Mum on at least one side surface; washing the surface of the copper foil with acid and alkaline, neutralizing the acid and alkaline and cleaning the acid and alkaline; chemically etching the copper foil with etching solution which contains organic matter, sulfuric acid (H2SO4), hydrogen peroxide (H2O2) and copper ion to form a plurality of micro holes on the surface of the copper foil, wherein the organic matter can be uniformly dispersed and adsorbed on the surface of the copper foil, and the H2SO4 and H2O2 can etch the position where no organic matter is adsorbed; irradiating the position where holes to be drilled on the printed circuit board with the carbon dioxide laser and breaking down the copper foil and the substrate to finish drilling holes on the printed circuit board.

The invention relates to an optical fibre fused tapering method using high-frequency pulse carbon dioxide laser as a heat source. The method precisely adjusts laser beams based on the good heat absorption performance of a silica optical fibre close to the carbon dioxide laser wavelength and the characteristics that the high-frequency carbon dioxide laser can generate a continuous high temperature, so that a fused tapered optical fibre is drawn while the laser beams heat up the optical fibre continuously along a certain optical fibre length. The method is mainly characterized by: designing a reasonable laser beam scanning track graph, and ensuring that the laser beams scan the optical fibre all the time during the whole drawing procedure and that a heat area stable enough can be generated on the optical fibre; and simultaneously adjusting the parameters of the carbon dioxide laser beams and the step length of a stepping motor, so as to ensure the heat and force balance of the optical fibre during the drawing procedure. The method does not pollute the optical fibre, and is not influenced by the indoor airflow, oxygen content and the like; and the heat source is similar to a point heat source, and the manufacture precision of the fused tapered optical fibre is greatly improved. The fused tapered optical fibre manufactured by the method can be widely used in the fields like beam splitting and connection of light, optical fibre sensing, optical filters, optical communications and the like; and the application potential is huge.

This invention relates to one carbon diode laser and metallic arc welding compound thermal source cameral system, which comprises semiconductor laser, floodlight tube, 3D optical adjust rack, multiple ultraviolet antireflection film, round bias vibration combination, intervene filter slices, cameral lens, transfer head and cameral machine, wherein, the former three parts form light source structure; later three parts form image forming structure; the cameral and transfer head form cameral structure; the light structure is at one side of cameral subject and the image forming structure and structure are connected through transfer head at other side of the subject.

The invention relates to a laser restoring process for the surface of a high carbon alloy roller. The laser restoring process comprises the following steps: (A) processing the surface of the roller, and carrying out failure analysis on the roller; (B) optimizing process parameters according to failure analysis results of the roller, and carrying out laser cladding; adopting a preset powder-feeding mode to enable a fast-transverse-flow carbon dioxide laser serving as a light source to carry out continuous screwfeed lap joint scanning on the roller; and enabling adopted alloy powder to comprise, by weight, no more than 0.15% of C, 12.5%-14.5% of Cr, 1.3%-1.8% of B, 0.5%-1.5% of Si, 0.5%-1.5% of Mo, and the balance Fe; and (C) performing detection. The laser restoring process for the surface of the high carbon alloy roller carries out laser cladding on the surface of the roller to enable the dimensions of the roller to meet the using requirements, a roller base body and a cladding layer are combined tightly, the thickness and the hardness of the cladding layer are uniform, and abrasion resistance of the roller can be enhanced.

The invention discloses a method for fabricating a three-dimensional optical echo wall mode micro-cavity with high-quality factors by using femtosecond laser. The method comprises the following steps of femtosecond laser irradiation on a transparent material, chemical corrosion, carbon dioxide laser annealing and the like. According to the three-dimensional optical echo wall mode micro-cavity, fabricated according to the method disclosed by the invention, the size of a small support column, the size of a micro disc, and included angles of the small support column and the micro disc relative to a substrate are determined by a design. The profile of the micro-cavity is of a micro ring structure, the surface finish quality is extremely high, and the quality factors are very high.

The invention provides an adjuster for light spots output by a carbon dioxide laser therapeutic machine terminal. The light spot adjuster comprises a light spot adjustment main body with a hollow structure, wherein a laser beam input end is connected with a laser beam input end connection seat with a hollow structure; the laser beam input end connection seat is in threaded connection with a light guide arm of external laser input equipment and is used for introducing a laser beam; a laser output end is connected with a light spot positioning display cover for positioning and displaying the output light spots at a position to be treated; the light spot adjustment main body comprises a lens moving frame in which a focusing lens is fixed, a lens moving supporting frame, a lens moving frame supporting ring for supporting a moving space for the lens moving frame, a light spot adjustment handle, a smoke discharging device and a handle moving clearance adjustment ring. According to the adjuster disclosed by the invention, laser beam light spots with different light spot diameters can be obtained only by adjusting a distance between the focusing lens of the same specification and a treated tissue, and uniform and consistent laser beam light spots with different diameters can be scientifically, quickly and conveniently obtained.

The invention discloses a method for preparing a hydroxy apatite biological ceramic coating containing fluorine. The method comprises the steps of evenly mixing 2.3% of calcium fluoride powder by weight and 97.7% of hydroxyapatite powder by weight, utilizing polyving akohol solution with concentration of 2% to serve as binder to allocate the mixed powder, presetting the allocated mixed powder on a titanium alloy base plate, and utilizing a carbon dioxide laser to perform broadband laser cladding on the titanium alloy base plate to generate the hydroxy apatite biological ceramic coating containing the fluorine, wherein the cladding process adopts two process parameters as follows: the laser output power P of the carbon dioxide laser ranges from 0.5kW to 1kW, the scanning speed V ranges from 150nm/min to 250nm/min, the rectangular spot dimension D is 15mm*2mm, and argon shield is adopted. By means of the method, good biological activity of the ceramic coating and high strength and good toughness of metal are combined together, and the hydroxy apatite coating containing the fluorine can protect the titanium alloy base plate from being corroded by the human physiological environment. Besides, the coating and the metal of the base plate are combined through the laser cladding preparation technique, so that the hydroxy apatite biological ceramic coating containing the fluorine meets mechanical performance requirements of implant materials.

The invention relates to the field of PCB coding, and provides a direct coding method for a PCB. The direct coding method comprises the following steps: directly coding the PCB by using a carbon dioxide laser, wherein the size of the focus light spot of the carbon dioxide laser is equal to or smaller than 0.14 mm; aiming at two-dimensional codes or one-dimensional codes in different sizes requested on different PCBs, coding is realized by controlling the power of the carbon dioxide laser and selecting different coding modes. The high-precision, high-speed and programmable carbon dioxide laser is adopted to directly code the PCB, aiming at two-dimensional codes or one-dimensional codes in different requested sizes, the coding depth can be controlled by controlling the power of the carbon dioxide laser, and appropriate coding modes are selected, so that the PCB is not damaged in the coding process, automation can be achieved in the production process, and the labor and the materials can be saved; laser coding is not affected by assembling steps or environment, can be directly acted on the PCB, and the process lasting property is good, so that the effect that the code lasts for the whole life of the PCB is achieved.

The present invention provides pressure-sensitive adhesive films with a favourable visual appearance and surface printability without discoloration and burrs on the cutting edge after short-wavelength laser machining. At the same time, the PSA films of the present invention exhibit a favourable cuttability, allowing for high fiber laser as well as carbon dioxide laser cutting speeds. Since the use of the PSA films of the present invention as surface protecting films does not require extensive cleaning and polishing operations after the cutting process and the cutting process itself may be accelerated, the efficiency of laser machining methods may be improved.

The invention provides a ceramic shell, a method for processing the surface thereof, and electronic equipment. The method comprises the steps: performing laser etching on the outer surface of the ceramic shell through a carbon dioxide laser to form a texture pattern, wherein the depth of the texture pattern is 0.005-0.09 mm. Therefore, not only can the three-dimensional texture be processed on thesurface of the ceramic shell, but also the ceramic surface (high gloss, bright surface) of the part which is not subjected to laser etching and the ceramic surface (relatively low gloss, matte surface) of the part which is subjected to laser etching form a surface appearance effect with alternate brightness and darkness or matte contrast, so the appearance effect of the surface of the ceramic shell is enriched; furthermore, due to the fact that the depth of the machined texture pattern is small, the ceramic shell with the small thickness can be prevented from being broken in the machining process, the surface machining yield of the ceramic shell can be improved, and it is effectively guaranteed that the obtained ceramic shell still has good mechanical strength such as falling resistance and impact resistance.

The invention relates to a hollow beam gas laser, which belongs to the field of optics and optical engineering. The generation of a hollow laser beam can be divided into two kinds, wherein one is transforming a known beam, which is of technical difficulty in either the restrict requirement for the properties of the known beam or complex auxiliary optical component; and the other kind is directly generating and outputting the hollow beam from a laser, which is of a higher cost of the crystal for the solid device and the semiconductor laser for the pumping. The laser of the invention belongs to the first kind, and the invention relates to a method and device for outputting a hollow gas laser beam. The device has simple construction and stable output. The hollow carbon dioxide laser in watt level and the hollow helium neon laser in milliwatt level can be focused to a hollow beam at a very small dark field size, which can be used as optical tweezers, optical wrench, optical guide tube, etc. The laser is enabled to operate when clamped. Large-scale carbon dioxide laser can be applied in the aspect of material processing.