| 光谱学与光谱分析 |
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| Optical Design and Performance Analysis of Light and Small Echelle Spectrograph |
| NING Chun-li1, 2, QI Xiang-dong1, CHEN Shao-jie1, 2, Bayanheshig1, CUI Ji-cheng1, 2 |
1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract The present paper analyzed the influence of the pinhole diameter, grating parameters, CCD pixel size, prism parameters, system aberrations and found that the first three are the main factors, and then deduced the mutual restraint relationship among them. On this basis, a portable high-resolution echelle spectrograph was designed. Applying this design, aberration was fully corrected and spectral resolution achieved the demand. With the Hg lamp calibrated and restored, the actual resolution gets up to 0.038 nm which is significantly better than target (0.05@200 nm), while the ordinary grating spectrometers need 500 mm focal length to achieve this resolution. From this result, the advantages of the portable echelle spectrograph are fully demonstrated.
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Received: 2012-04-25
Accepted: 2012-07-15
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Corresponding Authors:
NING Chun-li
E-mail: ningchunli.hi@163.com
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