A device for converting heterogeneous beam of radiation to homogeneous beam by absorption or refraction of unwanted components.
利用吸收或折射掉不需要的成分，把非单色光束变成单色光束的装置。
The results reveal that besides the nonlinearity and absorption, the diffraction is another important factor that affects the shock formation of an ultrasound beam.
结果表明：除了非线性强度、吸收外，衍射是另一个影响非线性超声束冲击波形成的重要因素。
Many molecules and particles in the atmosphere cause extinction of an incident beam of infrared radiation due to absorption and scattering processes.
由于吸收和散射的作用，大气中的许多分子和粒子使得红外光束消失。
The relations between pump absorption losses and the waveguide cavity configuration parameters are calculated based on the Gaussian beam transformation in the plane-parallel resonator.
通过高斯光束在乎面平行腔中往返变换，计算了光泵远红外波导激光器中泵浦吸收、损耗与波导谐振腔结构参数的关系。
However, the high energy ion beam may result in a large absorption of film materials and thus makes the technique useless.
然而，高能离子束诱发薄膜材料相当大的吸收，导致该技术几乎无法使用。
However, for strongly-coupled gratings if the absorption of medium cannot be ignored, the diffraction efficiency decreases with widening of reference beam.
当介质的吸收不可忽略时，对于耦合较强的光栅，参考光尺寸的增大反而会引起衍射效率的下降。
Absorption of the light allows both the spin and orbital angular momentum of a light beam to be transferred to microscopic particles held within optical tweezers, forming an optical spanner.
光的吸收可以同时导致光束的自旋角动量或轨道角动量转移给微米粒子，就像光学镊子一样引起粒子的转动，从而形成光学扳手。
The crystal window of high power laser can not work in gear because of the heat caused by absorption of high power beam.
对于高能激光器来说，晶体材料输出窗口因吸收致热而无法正常工作。
The absorption characteristics of eight kinds of powder layers coated on common metals have been investigated using CO_2 laser beam with low and high power density.
研究了八种金属材料表面涂布绝缘和非绝缘粉末层在低功率密度和高功率密度的CO_2激光作用下的吸收特性。
Laser welding is a kind of welding method of high-quality and high efficiency, but it is rarely used because of high reflectivity and low absorption of aluminum alloy against the laser beam.
激光焊是一种高质量、高效率的焊接方法，但铝合金对激光束具有较高的反射率及较低的吸收率而很少使用。
Double Beam Atomic Absorption Spectrophotometer.
双光束原子吸收分光光度计。
Double Beam Atomic Absorption Spectrophotometer.
双光束原子吸收分光光度计。
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