光谱密度spectral concentration以波长a为中心的微小波长宽度范围内辐射量x(即辐通量、辐照度、辐亮度等)一与该波长宽度之比。xt幼=dXldd光谱密度用来表示光源在特定波长下所具有的能量,其相对值与波长之间的函数关系相对光谱功率分布是光源的主要特性。
进一步又讨论了噪声的关联时间对原子激光谱密度的影响。
Effects of the correlation time of noises on the spectral density also are discussed.
并依据部分相干光的交叉光谱密度的傍轴传输方程,重新定义了普遍的部分相干光的传输因子。
The new definition of the beam propagation factor for partially coherent light is proposed through the propagation equations of the cross-spectral density.
拉曼光谱的工作原理是使用一束激光照射到原子上,然后收集并分析产生的散射光的波长和密度。
Raman spectroscopy works by shining a laser light onto a molecule and then collecting and analysing the wavelength and intensity of the resulting scattered light.
应用推荐