1386 results about "Laser technology" patented technology

A three-dimensional biomedical device having an osteoinductive first area with a controlled porosity and a second area, which is produced by laser technology from a powder including one of ceramics, metals, metal alloys, bioactive glasses, lead zirconate titanate and biocompatible polymers, or mixtures thereof. The ratio of the porosities from the second area to the first area is equal or less than one, preferably from 0.001 to 0.9. A method for manufacturing the device for fitting in a bone defect, wherein a virtual object is designed with a computer-aid designed software, and the device is manufactured by laser technology including layering a powder onto a plate (7) so that a layer of a predetermined thickness is formed; the laser beam (8) selectively processes the powder to produce a processed layer, and, thus, layer after layer, the layers are joined together until the biomedical device is formed.

Method and apparatus for disinfecting and/or sterilizing a root canal system by targeting the water content of disease and debris in the canals. The laser technique of employs a frequency of the wavelength emissions between about 930 to about 1065 nanometers with an optimum of 980 nm. This range of wavelengths targets the water content of tissue cells and pathogens as well as any residual organic debris in water within the root canal system after its preparation while being poorly absorbed by the surrounding dentin. The selection of the optimum wavelength produces significant effects generating and advancing treatment to the targeted aqueous environments. This is due to the rapid energy absorption by the water and the subsequent creation of gas bubbles, liberation of heat and subsequent propulsion of waves of heat and gas that impact along the canal walls and ramifications resulting in an enhanced bacterial kill and cleaning of the canal walls and ramifications. No dyes or other additives are necessary to enhance the effectiveness of the laser kill of bacteria, etc.

This apparatus relates to ice-bagging apparatuses with an ice maker and a hopper for receiving ice from the ice maker. The apparatus utilizes rotating drums designed for delivering ice into a bag. The apparatus also possess bagging and drop mechanism which fills and mechanically seals each bag of ice and drops it into a freezer for storage. The apparatus has an electronic operating system that has been greatly simplified using infrared technology and/or laser technology. The operating system is connected with the internet and a central processing center to allow for complete managing and monitoring of the system.

The invention discloses a display panel and a manufacturing method thereof. The display panel comprises a substrate, the substrate comprises a display area and a surrounding area surrounding the display area, and the display panel further comprises at least one layer of protective layer covering the cutting area corresponding to a cutting line of the surrounding area. The display panel has the advantages that the protective layer is arranged at the edge of the surrounding area, the protective layer can absorb laser energy and release impact force when the laser technology is used subsequentlyfor cutting, edge film layers are prevented from being heated and impacted to generate cracks spreading to the display area, and problems that the film layers of the cutting area is prone to cracks due to excessive laser intensity in the existing technology and the cracks conduct inward into the display area to affect the display are solved.

The invention discloses a ceramic drilling method of a composite nanosecond-picosecond-femtosecond laser technology. The ceramic drilling mechanism of the composite nanosecond-picosecond-femtosecond laser technology comprises the following steps: S10, providing multi-pulse-width fiber laser devices which comprise a nanosecond laser device, a picosecond laser device and a femtosecond laser device, roughly machining a ceramic workpiece fixed on a working table by using the nanosecond laser device, and meanwhile, spraying auxiliary gas at a position nearby a machining position; S20, carrying out finish machining on the ceramic workpiece which is machined roughly by using the picosecond laser device or the femtosecond laser device, and meanwhile, spraying auxiliary gas at a position nearby the machining position; and S30, presetting allowance for finish machining T, detecting residual allowance for machining t by using a dimension precision measurement instrument, repeating the step S10 when t is greater than T, repeating the step S20 when t is greater than 0 and smaller than or equal to T, and repeating in such a way until t is equal to 0. The auxiliary gas is sprayed at the position nearby the machining position, after rough machining by nanosecond laser, finish machining is implemented by picosecond or femtosecond laser, and therefore, machining precision and machining efficiency of the ceramic workpiece are improved.

The invention provides a method for preparing an ultra-high hardness cladding layer through the synchronous ultrasonic vibration assisting laser technology. According to the specific scheme, the method includes the steps that ultrasonic vibration is synchronously introduced in the Ni-based metal ceramic coating cladding process, mobility of liquid metal can be improved in the mode, tissue distribution is more uniform, in the solidification process, a growing dendrite net can be broken and made to be dispersed to all portions of melt, small crystal nucleuses which are uniformly distributed are formed, segregation of metal ceramic is avoided, and therefore it is guaranteed that the cladding layer is not prone to cracking when ultra-high hardness is acquired; equipment is simple, calibration and installation are facilitated, energy consumption is low, the working environment is good, and acquired coating metal ceramic particles are uniform in distribution, high in hardness and good in abrasion resistance.

The invention relates to a single-layer planar chirality metal structure circular polarizer which belongs to electromagnetic wave devices, and belongs to the technical field of electromagnetic waves of optics, terahertz, microwaves and other frequency bands. The circular polarizer is formed by a single-layer metal structure with planar chirality, and the functions of the circular polarizer are achieved on the basis of a one-way mode switching principle. The circular polarizer is easy to machine and integrate, thin, small in size and compact in structure, has high efficiency of screening on left-hand and right-hand circular polarization electromagnetic waves, and is low in device absorption loss and high in transmittance. By changing the design of the size and the structural design of the circular polarizer, the circular polarization function can be achieved at different electromagnetic frequency bands such as optics, terahertz and microwaves. The circular polarizer can achieve low-cost and large-area manufacturing, and has important application in the fields of optical microscopy, three-dimensional display, laser technologies, communication, radar and the like.

A system for imaging high speed moving objects, for example, using a scanning beam and beam delivery optics with fast signal processing. It can allow for vocal fold imaging at up to or exceeding approximately 1000 frames per second with grayscale resolution as high as about 100 micrometers or higher and up to about a 12.4 mm square or larger viewing area. The invention can provide imaging of vocal fold vibration that correlates completely with a synchronously-acquired acoustic voice signal. This can enable physicians, voice therapists and research scientists to understand the consequences of abnormal laryngeal dynamics, rather than being limited to simply observing the dynamics. Further, the application of laser technology will allow for accurate measurements of dimension. This can objectify examination findings and treatment outcomes measurement, helping to overcome the serious limitations of current perceptual-based judgments.

The invention relates to a passive mode-locking ultrashort pulse all-fiber laser with a waveband of 2.0 microns and belongs to the field of a laser technology and nonlinear optics. The passive mode-locking ultrashort pulse all-fiber laser with the waveband of 2.0 microns mainly comprises a laser pumping source, a pumping combiner, thulium-doped or thulium-holmium-codoped rear earth doped fibers, a circulator, a saturable absorber, a laser beam splitter, an isolator, a fiber bragg grating, a polarization controller and the like. The thulium-doped or thulium-holmium-codoped rear earth doped fibers are used as a gain medium; the saturable absorber is used as a passive mode-locking device; and the output of an ultrashort laser pulse which is in the waveband of 2.0 microns and has high pulse energy is realized. Due to the adoption of the all-fiber structure design, the passive mode-locking ultrashort pulse all-fiber laser with the waveband of 2.0 microns has the advantages of simple structure, high environment stability and the like, and the industrialization application is easy to realize.

The invention relates to the cold gas dynamic spray technology and the laser technology, in particular to a cold gas dynamic spray method comprising laser irradiation, wherein, compressed gas which carries with metallic powder impacts against the surface of a plaque at supersonic speed to form a circular spray spot on the surface of the plaque; meanwhile, an elliptic irradiation laser speckle is formed directly ahead of the circular spray spot through laser beam irradiation; moreover, the elliptic irradiation laser speckle and the circular spray spot are partly overlapped. The invention can substantially reduce the particle critical speed during cold gas dynamic spray and increases splicing efficiency and strength to ensure structural stability of spray particles, thereby improving coating performance.

The invention relates to a quasi-phase-matching higher harmonic device based on ultrasonic modulation in the laser technical field, which comprises a femto-second laser, a focusing lens, an ultrasonic transducer, a bar type nozzle, a metallic film, an X ray spectrometer, a computer, a vacuum chamber, a decompression gas valve and a control panel. The output light path of the femto-second laser is sequentially provided with the focusing lens, the ultrasonic transducer, inert gases, the metallic film and the X ray spectrometer. Lasers emitted by the femto-second laser is focused below the bar type nozzle by the lens and interact with the inert gases with density periodic variation which is spouted by the nozzle and modulated by an ultrasonic field to radiate higher harmonics which are reflected into the X ray spectrometer after being filtered by the metallic film and then are sent into the computer. The device meets the quasi-phase-matching condition of the higher harmonics by using ultrasonic modulation gas density, is convenient to be operated and simple and easy, can propel the coherent light source of the higher harmonics soft X ray to shorter waver.

The invention discloses a double-coating large-mode-area photon crystal flysecond laser directly obtaining micro joule-level single pulse energy, belonging to the field of laser technique and nonlinear optics, where the laser main body is based on double-coating large-mode-area photon crystal optical fiber of polarization-protection structure and adopts high-power LD laser to directly pump; the laser uses grating pair to compensate dispersion, starts mode locking with the help of semiconductor saturable absorber mirror (SESAM), and controls polarization by wave plate and polarization beam splitter and implements tunable output; laser resonant cavity keeps net positive dispersion inside and runs in self-similar mode locking mode and outside-cavity dispersion compensation is made on the output pulse and the pulse is 100-200fs wide. And the advantages: the laser has good stability, and the output pulse has high energy and high repeating frequency. And the invention can effectively avoid split of pulse running at high energy.

The present invention describes means to intentionally transmit power wirelessly from a portable communication device like a mobile phone, smart-phone, tablet or telephone watch using radio frequency, ultrasound, microwave or laser technologies to power up or charge devices external to the portable communication device. In particular the wireless power transmitter is physically placed inside the portable communication device or coupled to it, in order to have a means to transfer power without wires or cables to other devices. The present invention may be utilized in applications like sensors, implanted devices for medical use, speakers, mouse, keyboard, electrical glasses for 3D viewing, small displays, gadgets in the car, electronic toys and so on.

A substrate to which a laser technique is applied includes a signal layer, a micro via structure, and a differential signal pair. The micro via structure is divided into a first conductive column and a second conductive column after a laser-cutting step. The first conductive column includes a first flat conductive layer, and the second conductive column includes a second flat conductive layer. A first trace of the differential signal pair is parallel to and electrically connected to the first flat conductive layer. A second trace of the differential signal pair is parallel to and electrically connected to the second flat conductive layer. The distance between the first trace and the second trace is the same as the distance between the first flat conductive layer and the second flat conductive layer. The reflection of high-speed signals and the noise interferences can be reduced.

The invention discloses a device and a method for improving the surface quality of a selective laser melting (SLM) forming piece through an integrated double-type laser light. The device comprises anoptical fiber laser, an optical fiber laser beam expanding collimator, a femtosecond laser, a femtosecond laser beam expanding collimator, a scanning galvanometer, a lens and the like. During an SLM layered manufacturing process, a femtosecond laser technology is used for ablating and reconditioning spheroidization, bulges, powder adhesion and other defects probably occurred in each forming layerand a profile, so that the surface quality of each SLM forming layer is improved without producing an extra heat influence, the roughness of an upper surface and side surfaces of an SLM forming pieceare improved during an accumulation process, performance indexes such as the compactness and the size precision of the parts are improved, and the rejection rate of SLM processing is reduced.

The invention discloses an all-fiber pulsed laser, and belongs to the field of laser technology and nonlinear optics. The all-fiber pulsed laser includes a pump source (1), an optical combiner (2), a first gain fiber (3), a second gain fiber (4), a first reflective fiber Bragg grating (5), a second reflective fiber Bragg grating (6), an optical isolator (7), a full reflection mirror (8) and a circulator (9), and adopts a structure of linear cavity or annular cavity. By use of the rare earth-doped gain fibers as a laser modulator, with no additional external modulation source and an all-fiber structure, ultrashort pulse laser output of high stability, high power, high energy and high efficiency is achieved. Compared with a semiconductor saturable absorption mirror (SESAM) and graphene (Graphene) modulation Q, mode-locking technology, the all-fiber pulsed laser employs gain fiber for direct pulse modulation, has the advantages of simple design, compact structure and high stability, and is easier to industrialize.

Described herein is a method and system for providing a countermeasure against laser detection systems using nanocomponent material that is tailored to cloak or obscure a target from detection by transmitted laser radiation. The nanodot material absorbs and/or down-converts the transmitted laser radiation. Similarly, described herein is a method and system for providing a countermeasure against laser systems intended to blind a target through the use of a specifically engineered nanocomponent material for absorbing and/or down-converting the radiation from the laser system.