1. Laser processing system. Including lasers, light guide systems, processing machines, control systems and inspection systems.
2. Laser processing technology. Including cutting, welding, surface treatment, drilling, marking, scribing, fine-tuning and other processing techniques.
Laser welding: automotive body thickness plates, automotive parts, lithium batteries, cardiac pacemakers, sealed relays and other sealing devices and a variety of devices that do not allow welding contamination and deformation. Currently used lasers are YAG lasers, CO2 lasers and semiconductor pump lasers.
Laser cutting: automotive industry, computer, electrical housing, wood knife mold industry, cutting of various metal parts and special materials, circular saw blades, acrylic, spring washers, copper plates for electronic parts below 2mm, some metals Stencil, steel pipe, tinplate, plated lead steel, phosphor bronze, bakelite, thin aluminum alloy, quartz glass, silicone rubber, alumina ceramics below 1mm, titanium alloy used in the aerospace industry, etc. The lasers used are YAG lasers and CO2 lasers.
Laser treatment: can be used for surgery to reduce pain and reduce infection.
Laser marking: Widely used in a variety of materials and in almost all industries. Currently used lasers are YAG lasers, CO2 lasers and semiconductor pump lasers.
Laser drilling: Laser drilling is mainly used in aerospace, automotive, electronic instrumentation, chemical and other industries. The rapid development of laser drilling is mainly reflected in the fact that the average output power of the YAG laser for punching has been increased from 400w five years ago to 800w to 1000w. At present, the more mature laser drilling applications in China are in the production of synthetic diamond and natural diamond wire drawing dies and in the production of watches, instruments and gemstone bearings, aircraft blades, multilayer printed circuit boards and other industries. Most of the lasers currently used are YAG lasers and CO2 lasers, and there are also some excimer lasers, isotope lasers and semiconductor pump lasers.
Laser heat treatment: widely used in the automotive industry, such as cylinder liners, crankshafts, piston rings, commutators, gears and other parts of the heat treatment, and also widely used in the aerospace, machine tool industry and other machinery industries. The application of laser heat treatment in China is much wider than that of foreign countries. Most of the lasers currently used are YAG lasers and CO2 lasers.
Laser rapid prototyping: the combination of laser processing technology and computer numerical control technology and flexible manufacturing technology. Mostly used in the mold and model industry. Most of the lasers currently used are YAG lasers and CO2 lasers.
Laser coating: widely used in aerospace, mold and electromechanical "target=_blank> electromechanical industry. Most of the lasers currently used are high-power YAG lasers and CO2 lasers. Scientists at the University of Texas have developed the world's strongest power. Large operational laser, which produces 2,000 times the energy generated by all power plants in the United States, with an output of more than 1 picowatt – equivalent to 10 watts of 15 watts. The first launch was in 1996. Martinez said he hopes his project will break this record in 2008, that is, let the laser power reach between 1.3 and 1.5 picowatts. The super laser project is responsible for Mankal Martinez said: "We can let the material enter an extreme state that is invisible on Earth. The phenomenon we intend to observe in Texas is equivalent to entering a space to observe an exploding star. â€
The laser "grabs" the carbon nanotubes and moves them. Recently, scientists have developed new technologies that use lasers to "catch" carbon nanotubes and move them. This technology can provide chip manufacturing engineers with a new way to move nano-components to a predetermined location to create nanotube-based microchips.
Carbon nanotubes with a diameter of only a few nanometers and a length of about 100 nanometers have semiconductor properties, which means that carbon nanotubes may become the basis of low-power ultra-fast computer chips one day. To date, the only way to install carbon nanotubes has been to use an expensive device called an atomic force microscope to try to push the nanotubes to a predetermined position, but this method is very labor intensive.
To change this situation, scientists at New York University in Illinois and researchers at an optical company experimented with a technique called "optical capture," which sought to manipulate carbon nanotubes more conveniently. Optical capture technology is the ability of a laser to capture tiny particles that move tiny lasers following the laser as they move. Because the laser captures tiny particles, it moves like tiny scorpions as it moves. Scientists call this phenomenon "laser scorpion." Now biologists have been able to clamp individual cells with laser tweezers. For example, individual red blood cells are isolated from blood for the study of sickle-shaped hemoglobin anemia or malaria treatment studies. Laser tweezers can "clamp" tiny particles because the center of the laser beam is stronger than the edge intensity, so when the laser beam illuminates a tiny particle, it refracts more light from the center than the forward beam.
When the refracted light gets an outward impulse, the reaction force on the particle directs the impulse to the center of the laser beam, so the particle is always attracted to the center of the laser beam. If the particles are very small and have little gravity or friction, the particles move as the laser beam moves.
However, the diameter of blood cells moved by laser tweezers is a few microns, but it is much more troublesome to move carbon nanotubes with a diameter of only 2 to 20 nanometers. Therefore, it is possible to use a single laser tweezers to move a large number of carbon nanotubes to a certain position, which may be as troublesome as using an atomic force microscope.
To this end, scientists use a liquid crystal laser splitter to divide the laser beam into 200 individually controllable small laser beams. Researchers can control these laser beams to form triangles, quadrangles, pentagons, and hexagons. Move a large number of nanotubes to position them on the surface of the microscope slide to achieve the purpose of moving carbon nanotubes.
The success of optical capture technology is praised by Alex Zezel, a nanotube expert and physicist at the University of California, USA, who says that there is no reliable technology to manipulate large numbers of nanotubes. New optical capture technologies are likely to be used in industry.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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