摘要
本文报道通过改善热辐射光源光谱特性，相对提高短波辐射光强，以提高ＣＣＤ光学多道分析器在可见区特别是短波段吸收光谱的信噪比。改善后光源的短波辐射信噪比比一般热辐射光源提高约８倍。实验证实用此光源易在整个可见光区得到高信噪比的吸收光谱曲线。
In the present paper we report that the spectral property of light radiation was improved by using the method of increasing intensity of short wave radiation for increasing singal to noise ratio(S/N) of CCD OMA in measurement of sample's absorbance in visible light region especially short wave region.The signal to noise ratio resulting from the recording of short wave region for improved light source was increased by 8 times as high as that of a general Wlamp.As demonstrated by the experiment,absorbance spectrum with high S/N ratio can be obtained in the entire visible light region by using the improved light source in the measurement of absorbance.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1999年第3期286-287,共2页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金
关键词
吸收光谱
CCD
光学多道分析器
热辐射光源
Absorbance spectrum
CCD OMA
Thermal radiation source
Signal to noise ratio
