Briefly describe the core technology of laser cutting machine and its development history

　　 my country's laser cutting machine has also developed relatively fast in the past ten years. It is used in various industries: the clothing industry is used to cut cloth, the shoe industry is used to cut leather, and the wood is used for cutting and engraving. Cutting and carving of stone, steel, stainless steel and other metals, that is to say, laser has penetrated every industry, because of its efficiency and craftsmanship can achieve our ideal results. This high-end technology is developing in our country. To what extent, can we apply and develop better in the future, so we must understand his history and core technology. In fact, the initial Chinese name of laser is 'LaserIt means 'light amplification by stimulated radiation'. What is 'stimulated emission'? It is based on a new set of theories put forward by the great scientist Einstein in 1916. This theory is that in the atoms that make up matter, there are different numbers of particles (electrons) distributed at different energy levels, and the particles at high energy levels are excited by a certain photon, and they will jump from the high energy level to (transition). At a low energy level, light of the same nature as the light that excites it will be radiated at this time, and in a certain state, there can be a phenomenon that a weak light excites a strong light. This is called 'optical amplification by stimulated radiationLaser has four main characteristics: high coherence, high brightness, high monochromaticity and high directivity.

　　 First, the high coherence of laser: coherence mainly describes the phase relationship of each part of the light wave. It is the unique characteristics of lasers as described above that have been widely used in industrial processing.

　　Second, the high brightness of the laser: the brightness of the solid-state laser can be as high as 1011W/cm2Sr. Not only that, after the high-brightness laser beam is focused by the lens, it can generate thousands of degrees or even tens of thousands of degrees near the focal point, which makes it possible to process almost all materials.

　　三, the high monochromaticity of the laser: due to the extremely high monochromaticity of the laser, it is ensured that the beam can be accurately focused on the focal point to obtain a high power density.

　　Fourth, the high directivity of the laser: the high directivity of the laser enables it to effectively transmit a long distance while ensuring a high power density for focusing, both of which are Important conditions for laser processing.

　　Laser has been widely used in laser welding, laser cutting, laser drilling (including oblique holes, different holes, plaster punching, tipping paper punching, steel plate punching, packaging printing punching, etc.), Laser hardening, laser heat treatment, laser marking, laser packaging, laser repair circuit, laser wiring technology, laser cleaning, glass engraving, laser trimming, laser lithography, laser film making, laser thin film processing, etc.

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