| 轻型激光器构成 | laser Acronym for Light Amplification by Stimulated Emission of Radiation; a device that produces a powerful, highly directional, monochromatic, coherent beam of light. Laser consist of a transparent cylinder with a reflecting surface at one end and a partially reflecting surface at the other. Light waves are reflected back and forth, some of them emerging at the partially reflecting end. The light source may be a ruby, whose chromium atoms are excited by a flash lamp so that they emit pulses of highly coherent light, or a mixture of inert gases that produce a continuos beam, or a cube of treated gallium arsenide which emits infrared radiation when an electric current passes through it (受激发射辐射引起的扩增；一种产生一个强大的、高度定向、单色相干光束的装置。激光器 包含一个透明的圆柱管，其一端是一个反射面，另一端是一个部分反射面。光波来回反射，其中有些光波在部分反射面端出现。光源可以是红宝石，其铬原子是由脉冲激发，使其产生高度相干光；或由惰性气体混合物激发产生一个连续光束；或由经过处理的砷化镓立方体通电时发射出红外射线。) |
