大气成分探测红外光谱仪系统指标分析

由温室气体引起的全球气候变化和环境污染已经受到全世界的广泛关注。进行大气成分探测，对于更好地了解温室效应产生的细节、大气分子的光化学性质对臭氧层的影响以及大气污染机制都具有重要意义。由于大气成分种类较多，其红外吸收光谱密集且复杂，因此大气成分探测仪器需要有较高的光谱分辨能力和信噪比。文章进行了大气成分探测的总体指标需求分析，并据此确定了大气成分探测红外光谱仪的主要技术指标。为了满足指标要求，该光谱仪采用傅里叶变换红外光谱仪的总体方案。通过仪器性能影响因素分析和系统优化，使得该仪器的最终设计结果满足指标要求。

Analysis on Infrared Spectrometer System Specification for Atmospheric Composition Detecting

Global climate change and environmental pollution caused by greenhouse gases has received extensive attention all over the world. Detecting atmospheric composition is especial important for a better understanding of the detail of the green house effect, the influences on the ozonosphere of atmospheric photochemistry, as well as the mechanism of the air pollution. Because the kinds of atmospheric composition and their infrared absorption spectral lines are very dense and complex, atmospheric composition instruments need to have high spectral resolution and high signal-to-noise ratio （SNR）. This report briefly introduced the specification requirement analysis for space atmospheric detecting, and the main specifications of the instrument for space atmospheric detecting are defined. For realizing the main specifications, the overall scheme of the instrument adopts Fourier Transform Infrared Spectrometer （FTIRS）. The final design of the instrument meets the specifications through influence factor analysis and system optimization. Finally, the measurement result was given.