一、单色仪杂散光的讨论众所周知,拉曼效应是一个很弱的效应。其微分散射截面:(dσ)/(dΩ)=10~(-30)cm~2cr~(-1)。典型地,散射光强约为入射光强的10~(-6)～10~(-8)倍。如果所采用的单色仪的杂散光较大,待测的拉曼光谱线就有被连续的杂散光背景“淹没”的危险。因此用于散射光谱实验的单色仪最重要的一个指标是对杂散光的鉴别(或抑制)能力(discrimination)。但是如何量度它却没有统一的标准。一般我 First, monochromator stray light discussion As we all know, Raman effect is a very weak effect. The differential scattering cross section: (dσ) / (dΩ) = 10 ~ (-30) cm ~ 2cr ~ (-1). Typically, the scattered light intensity is about 10 ~ (-6) ~ 10 ~ (-8) times the incident light intensity. If the monochromator used has a large amount of stray light, the Raman spectrum to be measured is at risk of being “submerged” by a continuous background of stray light. Therefore, the most important indicator of a monochromator used for scattering spectroscopy experiments is the discrimination (or inhibition) of stray light. But how to measure it without a unified standard. General me