| 光谱学与光谱分析 |
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| Superhigh Spectral Resolution Measurement of Spectrometer |
| LIU Sheng-gang, WENG Ji-dong, TAO Tian-jiong |
| Institute of Fluid Physics，China Academy of Engineering Physics, Mianyang 621900, China |
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Abstract The spectral resolution is one of the most important indexes of spectrometer. A new method is put forward for measuring the superhigh spectral resolution based on the Rayleigh criterion and the optical heterodyne, and the uncertainty of this method is analyzed. The spectral resolution of some spectrometer was measured using this method, and the experimental results show that the spectral resolution is higher than 18.9 pm, and the standard uncertainty is 2.3 pm. When showed using wave number, the spectral resolution is higher than 0.078 8 cm-1, and the standard uncertainty is 0.009 6 cm-1.
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Received: 2012-07-15
Accepted: 2012-09-28
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