成像差分吸收光谱系统设计及应用

大气与环境光学学报 ›› 2014, Vol. 9 ›› Issue (5): 354-363.

成像差分吸收光谱系统设计及应用

李加云，司福祺，窦科，李传新，詹锴，王煜

（中国科学院安徽光学精密机械研究所环境光学与技术重点实验室，安徽合肥 230031）

收稿日期:2014-03-10 修回日期:2014-03-18 发布日期:2014-09-16
通讯作者: 李加云（1987-），女，山东日照市人，在读研究生，主要研究方向：环境监测领域的计算机应用技术. E-mail:jyli@aiofm.ac.cn
作者简介:李加云（1987-），女，山东日照人，在读研究生，主要研究方向：环境监测领域的计算机应用技术.
基金资助:
国家自然科学基金（41275037）、安徽省优秀青年科技基金(1308085JGD03)资助

Design and Application of Imaging Differential Optical Absorption Spectroscopy System

LI Jia-yun，SI Fu-qi，DOU Ke，LI Chuan-xin，ZHAN Kai，WANG Yu

（Key Laboratory of Environment Optics & Technology, Anhui institute of Optics and Fine Machanics, Chinese Academy of Sciences, Hefei 230031, China）

Received:2014-03-10 Revised:2014-03-18 Online:2014-09-16

摘要/Abstract

摘要：

被动差分吸收光谱技术（DOAS）是一种以太阳散射光为光源，利用不同气体分子的特征吸收来实现气体定性定量测量的方法。成像光谱技术作为一种新型光电探测技术，能同时获取观测区域的空间信息和光谱信息，该技术与DOAS结合构成了成像差分吸收光谱系统（IDOAS），可实现对气体的二维成像测量。设计了基于凸面光栅Offner成像光谱仪、面阵CCD、紫外镜头和扫描旋转台的成像差分吸收光谱系统，描述了系统的组成并着重介绍了Offner成像光谱仪的光学设计。针对该系统开发了基于MFC框架的软件系统，实现了探测器参数设置、数据采集与显示、数据存储、电机扫描控制、多波段成像、图谱合一等功能。利用该系统对发电厂烟羽排放进行外场测量，采用被动差分吸收光谱方法对采集的太阳散射光谱进行处理获得SO2柱浓度,实验证明系统运行稳定可靠，可用于污染气体的二维成像解析。

关键词: 成像差分吸收光谱系统, 被动差分吸收光谱技术, 成像技术, Offner光谱仪

Abstract:

Based on finger print absorption, the technique of passive differential optical absorption spectroscopy (DOAS) enables the qualitative and quantitative measurement of a variety of pollutants found in the atmosphere using scattering light as light source. As a new type of photoelectric detection technology, imaging detection technology can get the spatial and spectral information of the detection area at the same time, which makes it possible to realize two-dimensional imaging measurement of the pollutants when combined with passive DOAS. The experimental system consisted of convex grating Offner imaging spectrometer, matrix CCD, UV lens and scan table is introduced, and the optical design of the Offner imaging spectrometer is described in detail. The software system based on MFC was developed, which realized such functions as: detector parameter setting, data acquisition and display, data storage, the control of scan table, imaging of the target, and the combination of image with spectrum . The system was carried to scan the plume from a fossil power plant in a field measurement. And the column density of SO2 was retrieved from processing of the scattered sun light spectra collected by the system by means of the spectral analysis method of passive DOAS. The results show that the system can run stably and be used to realize two-dimension imaging measurement of the pollutants.

Key words: imaging differential optical absorption spectroscopy system, passive differential optical absorption spectroscopy, imaging system, Offner spectrometer

中图分类号:

TP31

李加云司福祺窦科李传新詹锴王煜. 成像差分吸收光谱系统设计及应用[J]. 大气与环境光学学报, 2014, 9(5): 354-363.

LI Jia-Yun, SI Fu-Qi, DOU Ke, LI Chuan-Xin, ZHAN Ka, WANG Yu. Design and Application of Imaging Differential Optical Absorption Spectroscopy System[J]. Journal of Atmospheric and Environmental Optics, 2014, 9(5): 354-363.

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