292 results about "Laser methods" patented technology

Methods, devices and systems for generating ultrashort optical linear chirped pulses with very high power by amplifying the pulses so that their temporal duration is longer than the storage time of the amplifying medium. The additional gain factor is related to the ratio of the storage time to the stretched pulse. A preferred embodiment connects a mode locked laser source that generates optical pulses whose duration is stretched with a chirped fiber Bragg grating. Embodiments include methods, devices and systems causing an extreme chirped pulse amplifier (XCPA) effect in an oscillator.

The invention discloses a three-dimensional information detection method based on dual laser and belongs to the technical field of three-dimensional measurement. The method comprises the following steps of: adopting two lasers, and respectively solving laser plane equations of the first laser and the second laser; collecting an object image containing dual laser by utilizing a camera in the eventof detecting the three-dimensional information of an object, and solving a centre line of each laser thick line; and rebuilding three-dimensional data by utilizing inner parameters of the camera and the laser plane equations of both lasers. Compared with the single-laser measurement method, because of large information amount, the method disclosed by the invention specifically has higher stability, reliability and accuracy; and simultaneously, the operation requirements are simple, thus the method has the important application in detecting the surface three-dimensional information of objects.

The invention relates to devices having periodic refractive index modulation structures and fabrication methods for the devices using a laser means. By focusing a pulsed laser beam into a transparent material substrate, a path of laser modified volumes can be formed with modified refractive index compared with the unprocessed material. By selecting appropriate laser parameters and relative scan speed, the laser modified path defines an optical waveguide. Separation distance of the individual modified volumes define a periodic modification pattern along the waveguide path, so that the waveguide structures also exhibit grating responses, for example, as spectral filters, Bragg reflectors, grating couplers, grating sensors, or other devices. This method of direct laser fabrication enables one-step fabrication and integration of periodic or aperiodic refractive-index modulation devices together with optical waveguiding properties to enable low-cost, multifunctional I D, 2D or 3D optical circuit fabrication for simple and complex applications.

The present invention relates to a metal foil laminated polyimide resin substrate wherein

• • a metal foil is directly laminated on one side or both sides of a polyimide resin substrate; and
  • the surface of the metal foil to be bonded to the polyimide resin substrate has a surface roughness (Rzjis) of 3.0 μm or less; a surface area ratio (B) of 1.25 to 2.50, in which the surface area ratio (B) is calculated as a ratio [A/6550] of a surface area of a two-dimensional region with a surface area of 6550 μm² which is determined by a laser method (three-dimensional area: A μm²) to the area of the two-dimensional region; and a chromium content per unit area of the two-dimensional region of 2.0 mg/m² or more.

A method of making shaped ceramic abrasive particles includes cutting a layer of ceramic precursor material using a laser beam and forming shaped ceramic precursor particles. Further thermal processing provides shaped ceramic abrasive particles. Shaped ceramic abrasive particles producible by the methods and abrasive articles containing them are also disclosed.

The invention is a method for using the secondary laser method to generate the white light source, it uses light source which can emit out ultraviolet and purple light (wavelength is 360-420nm), such as the illuminant diode (LED) and radium (LD), excites the blue fluorescence powder to emit out the primary excited light spectrum of the wideband whose main peak is blue light, then, the primary excited light spectrum excites the yellow fluorescence powder whose stage energy is lower, the secondary excited light spectrum can be emitted out whose main peak is yellow, through adjusting the proportion of the two kinds of fluorescence powder, the primary excited light spectrum and the secondary excited light spectrum can generate the complementary effect, and generate the whole spectrum white light; additional, there also can add in the red fluorescence powder and the green fluorescence powder excited by the ultraviolet light or the purple light, in order to adjust the color and the color temperature of the white light, and it can adjust the light source of other different color.

A laser method of printing a pattern on works which is read at a high read rate by optical readers and a system for implementing the laser processing method are described. print pattern data is generated based on printing conditions including at least an original print pattern such as a character string that are specified by users and then converted into data representing an actual print pattern to be actually printed on works according to a three dimensional profile of the works so that an orthogonal projection of that actual print pattern is identical with the original print pattern.

Methods and apparatus for analysis of a sample using Raman spectroscopy, which employs a multi-mode radiation source and a spectral filter, are disclosed. The source radiation produces a Raman spectrum consisting of scattered electromagnetic radiation that is separated into different wavelength components by a dispersion element. A detection array detects a least some of the wavelength components of the scattered light and provides data to a processor for processing the data. The resulting spectroscopic data has higher resolution and stability than conventional low-resolution Raman systems.

The invention discloses an exhaust gas blackness automatic detection device for diesel vehicles. The exhaust gas blackness automatic detection device comprises an image collecting unit, an image preprocessing unit, a vehicle speed and acceleration measuring unit, a license plate identifying unit and a blackness identifying unit. Through the exhaust gas blackness automatic detection device, the speed and acceleration data of diesel vehicles are obtained through a laser method to assist in blackness identification; license plate images and exhaust gas images of diesel vehicles are obtained on the testing section coated with white paint through a vertical shooting method; license plate information and ringelmann blackness level of the diesel vehicles are obtained by preprocessing image and identifying blackness.

Provided is a 3D precision shaping method of a conformal cooling structure of an injection mold. Based on heat transfer calculation, an efficient heat exchange conformal cooling flow channel three-dimensional model is established for the cavity face contour of the injection mold, layered structural division is performed on the conformal cooling flow channel three-dimensional model, corresponding structures in different layers are machined through a machining method, a laser method or a chemical etching method, and the structures in different layers are stacked and positioned according to corresponding sequence. The layered structures are welded through a diffusion welding method achieved by adding an intermediate layer, and 3D precision shaping of a conformal cooling flow channel is achieved; finally, a mold cavity is machined in a diffusion welding solid surface through a machining method, and 3D precision shaping of the conformal cooling structure of the injection mold is completed. By means of the method, the design space can be greatly expanded, and conformal cooling structures in any complicated shape can be manufactured. High strength and high precision of the conformal cooling structure is guaranteed, production cost is low, production efficiency is high, and the requirement for batch industrial production can be met.

The invention discloses a laser method and laser equipment adopting a robot. The laser equipment comprises a base and a laser machine arranged on the base, and the robot and a material area used for storing workpieces are further arranged on the base; a free end of the robot is provided with a clamp structure used for clamping the workpieces to move between the material area and a laser area; the clamp structure is provided with a clamping portion used for clamping the workpieces; the laser equipment further comprises a positioning mechanism used for positioning the workpieces. The robot is adopted for moving materials from a feeding area to the laser area of the laser machine and further moving the materials to a discharging area after laser operation is finished, full-automatic operations of the workpieces in the laser process are realized, and accordingly production efficiency is improved, and product defects resulted from manual operations are reduced; by the aid of the positioning mechanism, precision in workpiece positioning during clamping is realized to further realize precision laser of the workpieces.

The invention discloses the laser testing method of the roller bearing vibration displacement. Equip the bearing on the spin axis of the test bed; makes use of the reflection of the laser through the bearing surface to arrive the PSD sensor surface; the PSD position sensor gives the facula position. The internal loop and the main axis of the bearing can be viewed as the rigid body because the radial force carried by the external loop of the bearing. When the spin axis spins, the inner and the external loops and the roller bring about the vibration and reflect the displacement s of certain point of the bearing surface by the PSD sensor. The invention has simple structure, clear principle and high precision.

The current methods for preparing single-layer molybdenum disulfide include micromechanical exfoliation, liquid-phase ultrasonic exfoliation, lithium ion intercalation, laser method, annealing layer-by-layer thinning method, and chemical vapor deposition method. Molybdenum disulfide prepared by chemical vapor deposition method has large size, uniform surface and controllable layer number. When molybdenum disulfide is prepared by chemical vapor deposition, molybdenum disulfide is easy to nucleate and grow on defects such as impurities or scratches on the substrate. If the substrate is not cleaned cleanly, molybdenum disulfide will easily grow into multi-layer or solid materials. To clean the substrate thoroughly, toxic and dangerous drugs such as acetone and piranha solution will be used. These drugs are toxic to the human body, so the operation process is potentially dangerous. Based on the above problems, the object of the present invention is to provide a simplified chemical vapor deposition method for the preparation of single-layer molybdenum disulfide, which can produce high-quality single-layer molybdenum disulfide without using toxic hazards such as acetone and piranha solution. Drugs are used to clean the substrate, avoiding potential danger.

A method and apparatus for providing therapeutic pulse laser treatment. The treatment method includes delivering more than one therapeutic laser light protocol from a hand held therapeutic laser device according to a preprogrammed schedule. At one or more select times during the preprogrammed schedule, the hand held therapeutic laser device will produce audio output. The audio output provides information to the user and directs him or her to execute a step in the overall treatment plan. For example, the audio output may signal to the user that it is necessary to make a change in or between treatment protocols, move the laser device, pause treatment, or otherwise control the delivery of therapeutic laser light. The ability of a relatively untrained user to implement the method may be enhanced if the audio output is delivered as synthetic speech output.

The invention relates to a method for producing an anti-corrosion pattern in production of a printed circuit board, and the method comprises the steps of: drilling a hole, metalizing the hole, performing electrophoretic coating of a resist, producing the anti-corrosion pattern by laser, performing chemical etching and the like. The method with the electrophoretic coating of a resist and the production of the anti-corrosion pattern by the laser is adopted for replacing an existing tenting method process with the steps of hot-press lamination of an anti-corrosion photoinduced masking dry film, exposure, developing and the like or replacing the steps of pattern electroplating of an anti-corrosion metal layer and the like. According to the method disclosed by the invention, a process route for producing the anti-corrosion pattern is shortened, the operation steps are simplified, the operability is improved, the anti-corrosion coating is applied by electrophoresis, materials are easy to obtain, the operation is simple and easy, and the formed anti-corrosion coating is thin in thickness, uniform and reliable; and the anti-corrosion pattern formed by direct photoetching through the laser method is high in precision, good in an environment and great in production flexibility. The method disclosed by the invention is suitable for sample, small-batch, multi-variety and higher-precision production of the circuit boards, and is also suitable for production of ordinary circuit boards.

The invention discloses a laser SLAM method based on facial line corner feature extraction, which comprises the following steps: (1) initializing a map and various parameters, and allocating memory; (2) collecting point cloud collected by the 3D laser radar; (3) carrying out data preprocessing on the collected point cloud; (4) carrying out projection; (5) removing blocking points; (6) extracting surface, line and corner features; (7) carrying out surface normal vector estimation on the surface and line features; (8) performing front-end registration calculation on the angular point feature information; (9) removing redundant parts in the point cloud, and storing key frame information, pose information and carrier track information; (10) performing loopback detection on the key frame information and the motion trail information; (11) performing back-end optimization; (12) updating the pose, performing fusing and mapping, and publishing map information and track information; and (13) skipping to the step (2), and continuing to run until the mapping is completed or the process is closed.

The invention relates to a method for preparing a super-hydrophobic surface material with an adjustable contact angle by a one-step laser method. The method comprises the following steps: (1) cutting a polytetrafluoroethylene base material and then sequentially placing the polytetrafluoroethylene base material in acetone, absolute ethyl alcohol and deionized water, ultrasonically cleaning for 3-10min respectively and then drying at 50-100 DEG C; (2) setting the spot diameter of a CO2 laser engraving machine to 0.1-0.5mm, setting an engraving speed to 20-40mm/s, setting frequency to 20-80KHZ, setting spot engraving time to 0.1-1ms, setting power to 20-40%, and setting engraving times to 1-5; (3) placing the treated polytetrafluoroethylene base material on the sample platform of the laser engraving machine, controlling a laser device to process a dot matrix or line matrix pattern on the polytetrafluoroethylene base material by laser operation software, and then obtaining the super-hydrophobic surface material provided with a surface with different contact angles. The preparation method disclosed by the invention is simple and rapid, low in cost and environmentally friendly; the prepared super-hydrophobic surface material is stable in structural performance, the contact angle can be manually adjusted with the changes of process parameters, and the method is suitable for industrialized production applications.

The invention provides a low temperature preparation method for a transparent conductive oxide film. After a seed crystal layer is prepared through a pulsed laser method, niobium doped titanium oxide transparent conductive film material is prepared in succession respectively through the pulsed laser method or a magnetron sputtering method. The seed crystal layer can be anatase crystal type titanium oxide single-crystal. The thickness of the seed crystal layer is controlled at the length of c shafts of 0.5 to a plurality of unit cells. The titanium oxide base film material is continuously bred and prepared on the substrate material with the seed crystal layer through the pulsed laser method or the magnetron sputtering method. The preparation process has less dependency on the preparation technology and growing conditions. The preparation technology is flexible and is full of selectivity. The visible light transmission rate of the obtained titanium oxide base transparent conductive film is higher than 90 percent; and the resistivity at a room temperature is lower than 8x10<-4>ohm.cm. The method realizes the growth and preparation of the transparent conductive oxide film capable of replacing ITO.

A method for making accurate and precise customized corrections to the surface of an optical lens is described. An electronic correction contour is generated from a measured refractive correction for a patient, and transferred to the surface of the lens by ablation etching with one or more laser pulses. After each of the laser pulses, the refractive properties of the lens are measured and compared to the electronic contour correction derived from a patient's refractive correction. The ablation etching is terminated in localized areas where the refractive properties match the electronic correction contour. End point detection includes monitoring refractive qualities of the lens during the recontouring process, modifying the pattern through changes in the laser pulses.

The invention discloses a method for making local laser metal color on the surface of a printing material, and aims to overcome the defects that the conventional whole laser embossing layer influences the local protruding visual effect of a printed matter, and the local laser method has deficient technical means, poor laser effect and low production efficiency. The technical scheme has the key points that: the method comprises the following steps of: coating a release agent on a specific film; printing image-text on a release layer; making the laser embossing layer on the image-text; plating aluminium on the laser embossing layer; gluing the aluminium plating layer; compounding the film and the printing material; peeling the film; and remaining the image-text, the laser embossing layer and the aluminium plating layer on the printing material; and the method is characterized in that: the step of making the laser embossing layer on the image-text comprises the substeps of: intagliating an area range needing the laser embossing layer on a gravure printing device on a cylinder; locally printing UV-cured gloss oil on the image-text; embossing laser grains on a UV-cured gloss oil area by using an embossing device; and curing the UV-cured gloss oil area by using a UV curing device to obtain the local laser embossing layer.

The invention provides a laser cladding preparation method of a ceramic reinforced metal base composite coating. The laser cladding preparation method of the ceramic reinforced metal base composite coating comprises the following steps that the step 1, a metal substrate is prepared; the step 2, alloy auxiliary lasers are utilized to melt metal powder on the surface of the metal substrate so as toform a metal cladding layer; and the step 3, the metal cladding layer is molten, and ceramic powder is injected into the metal cladding layer. Compared with the prior art, the laser cladding preparation method of the ceramic reinforced metal base composite coating has the following advantages that the phenomenon that ceramic particles are molten and decomposed due to the fact that the ceramic particles are directly irradiated and heated by laser beams is avoided, a large number of ceramic particles can be reserved in the primitive form and uniformly distributed on the coating, the high hardness, wear resistance and corrosion resistance features of ceramic materials are given full play to, the reinforcement effect of the coating is improved, and the mechanical property of the coating is improved. In conclusion, the prepared ceramic reinforced metal base composite coating is good in performance, and the defects of the technology and the performance of metal base ceramic coating preparation according to a conventional laser method are effectively overcome.