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试验物理与计算数学国家级重点实验室 北京,100076
Received:11 June 2015,
Revised:30 June 2015,
Published:14 November 2015
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李建华, 薛峰, 薛莲等. 红外傅里叶变换成像光谱仪关键参数测试[J]. 光学精密工程, 2015,23(10z): 191-197
LI Jian-hua, XUE Feng, XUE Lian etc. Performance test of Fourier transform infrared imaging spectrometer[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 191-197
李建华, 薛峰, 薛莲等. 红外傅里叶变换成像光谱仪关键参数测试[J]. 光学精密工程, 2015,23(10z): 191-197 DOI: 10.3788/OPE.20152313.0190.
LI Jian-hua, XUE Feng, XUE Lian etc. Performance test of Fourier transform infrared imaging spectrometer[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 191-197 DOI: 10.3788/OPE.20152313.0190.
研究了成像光谱仪的关键参数的测试。介绍了关键指标噪声等效光谱辐亮度(NESR)的物理意义
计算模型、测试原理及数据处理方法。采用标定过的黑体作为辐射源对中波及长波红外傅里叶成像光谱仪进行了实验测试
测试内容包括NESR、测温精度及光谱误差。测试结果显示: 长波成像光谱仪的NESR在10 μm处的均值为21.4 nW/(cm
2
·sr·cm
-1
)
中波下的NESR在4.6 μm处的均值为4.6 nW/(cm
2
·sr·cm
-1
)
长波成像时光谱仪在整个光谱范围内的测温精度小于0.4 K
中波成像时其测温精度小于2 K
光谱误差均小于光谱分辨率的一半。另外
所有被测指标参数均在标称值以内
说明了测试方法的可行性。提出的测试方法对成像光谱仪的定期测试有参考意义。
The paper researches the measurement methods of key parameters of Fourier transform imaging spectrometers. Firstly
the physical meaning of the key parameter Noise Equivalent Spectral Radiance(NESR) was introduced and corresponding calculation model
test principle and data processing method were given. Then
a calibrated black body was used as radiation source
the performance parameters of Fourier transform imaging spectrometer for mid-wavelength and long-wavelength were tested experimentally
including the NESR
radiometric accuracy and spectral errors. Test results show that the average NESRs of infrared imaging spectrometer for long-wavelength at 10 μm is 21.4 nW/(cm
2
·sr·cm
-1
) and that for mid-wavelength at 4.6 μm is 4.6 nW/(cm
2
·sr·cm
-1
). The radiometric accuracies of the spectrometer is less than 0.4 K and 2 K for long-wave and mid-wave
respectively. The spectral errors of the spectrometer for both mid-wavelength and long-wavelength are less than half of the spectral resolution. These parameters are all in the normal range
which verifies the feasibility of test method. It provides references for the periodically measurement of imaging spectrometers.
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