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激光是一种新型光源,激光是受激辐射光放大产生的一种单色性、方向性和相干性都很好的强光光束。激光器是20世纪的重大发明之一,是人造光源的一次革命。自1960年美国的梅曼发明了第一台
Laser is a new kind of light source. Laser is a strong light beam with monochromaticity, directionality and coherence produced by the amplification of stimulated radiation. Lasers are one of the major inventions of the 20th century and are a revolution in artificial light. Mememan invented the first one since 1960 in the United States