Дневник пользователя youkey23
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Laser Cutting for a Variety of Materials |
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Добавлено youkey23, Суббота, Июль 30, 2022 - 03:56 |
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Have you ever wondered "what can you cut with a laser cutter?" The answer is, pretty much anything. Laser cutting works by directing a highly concentrated beam (the output of a high-powered laser) onto the desired surface through a series of lenses that amplify its intensity. When the laser beam hits the material on the target surface, it is either vaporized, melted, burned away, or blown away by the gas jet.
Laser engraver for wood
Lasers are used to cut, etch, mark and engrave materials for a variety of applications. On the industrial side, auto and aerospace parts manufacturers use laser cutters to mark parts with unique traceability numbers or product identification numbers, allowing regulators to trace each part's path through the supply chain. Product designers use laser cutting to create home decor products and other crafts. The wide range of applications for laser cutters is due in part to the versatility of laser cutting materials, including:
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What is a laser? |
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Добавлено youkey23, Четверг, Июль 7, 2022 - 10:46 |
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"Laser" is an acronym, and the five letters of the word come from the initials of the phrase "light amplification by stimulated emission."
Electrons in atoms can absorb energy from light or heat only if there are transitions between energy levels that match the energy carried by photons or phonons. For light, this means that any given transition will absorb only one specific wavelength of light. Photons with the correct wavelength can make electrons jump from lower energy levels to higher energy levels. Photons are consumed in the process.
When an electron is excited from one state to a higher energy level with an energy difference ΔE, it doesn't stay in that state forever. Eventually, a photon will spontaneously emerge from a vacuum with energy ΔE. Energy is conserved, electrons transition to unoccupied lower energy levels, to different energy levels with different time constants. This process is called "spontaneous emission". Spontaneous emission is a quantum mechanical effect and a direct physical manifestation of Heisenberg's uncertainty principle. The emitted photons have random directions, but their wavelengths match the absorption wavelengths of the transitions. This is the mechanism of fluorescence and thermal emission.
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