| 扩展光源对微型FTIR光谱复原的影响分析 |
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| 引用本文： | Fu JG,Liang ZZ,Liang JQ. 扩展光源对微型FTIR光谱复原的影响分析[J]. 光谱学与光谱分析, 2011, 31(6): 1723-1726. DOI: 10.3964/j.issn.1000-0593(2011)06-1723-04 |
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| 作者姓名： | Fu JG Liang ZZ Liang JQ |
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| 作者单位： | 1. 应用光学国家重点实验室,中国科学院长春光学精密机械与物理研究所,吉林,长春,130033;中国科学院研究生院,北京,100049
2. 应用光学国家重点实验室,中国科学院长春光学精密机械与物理研究所,吉林,长春,130033 |
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| 基金项目： | 国家高技术研究发展计划项目,国家自然科学基金项目 |
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| 摘 要： | 分析了基于多级微反射镜的傅里叶变换红外光谱仪(FTIR-FOurier transform infrared spectrometer)中扩展光源对光谱复原的影响,计算了干涉强度与光源立体角之间的关系.分析表明,扩展光源存在的立体角导致系统的相干长度变短,光谱分辨率降低.当扩展光源的立体角小于0.001时,系统的分辨率...
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| 关 键 词： | 傅里叶变换红外光谱仪 误差分析 扩展光源 分辨率 |
Influence of extended light source on spectral reconstruction in a micro FTIR |
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| Fu Jian-Guo,Liang Zhong-Zhu,Liang Jing-Qiu. Influence of extended light source on spectral reconstruction in a micro FTIR[J]. Spectroscopy and Spectral Analysis, 2011, 31(6): 1723-1726. DOI: 10.3964/j.issn.1000-0593(2011)06-1723-04 |
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| Authors: | Fu Jian-Guo Liang Zhong-Zhu Liang Jing-Qiu |
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| Affiliation: | State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun130033, China. jianguofu1984@163.com |
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| Abstract: | The influence of extended light source on spectral reconstruction in the FTIR (fourier transform infrared spectrometer) based on step mirrors was discussed in the present paper. The relationship between coherent intensity and solid angle was calculated. It was found that the coherent length became shorter and the spectrum resolving power became lower as a result of solid angle produced by the extended light source. The spectrum resolving power of system could reach the value as the theoretic design if the solid angle of extended light source is smaller than 0.001. The radiance will reduce if the size of extended light source is shortened. Therefore, a suitable size of extended light source can be chosen, considering the requirement of SNR in the optical design. |
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