随着激光光源频率范围的不断扩展，光探测手段的不断丰富，拉曼光谱的检测灵敏度获得了极大的提高；
With the expansion of frequency range of modern laser and the enrichment of light detection method, sensitivity of Raman spectrum has made great progress.
本装置是一多功能光谱测试装置，适用于对红外探测器作宽范围光谱灵敏度的测量，以及红外光源光谱能量分布测量。
This apparatus is a multifunction spectrum testing set-up, which suits to measure for infrared detectors the wide range spectral sensitivity and also the distribution of spectral energy.
光声光谱法是基于红外吸收光谱原理的一种高灵敏度的微量气体探测技术。
Photoacoustic detection of trace concentrations of gases is one of the most sensitive techniques of infrared Absorption spectroscopy.
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