Field-dependent wavelength drift compensation in Fabry-Perot solar imaging spectrometers
文献类型：期刊论文
| 作者 | Ma L(马琳)1,2,3; Ji KF(季凯帆)1,3; Jin ZY(金振宇)1,3; Chang L(常亮)1,3; Zhu J(朱瑾)1,2 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2026-04-09 |
| 卷号 | 708 |
| 关键词 | instrumentation: interferometers methods: observational techniques: imaging spectroscopy |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202558573 |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | Context. Fabry-Perot interferometers (FPIs) have become fundamental instruments for high-resolution imaging spectroscopy and magnetic field measurements in solar physics. In telecentric configurations, cavity defects of the FPI can introduce an inhomogeneous wavelength response across the field of view (FOV), which severely limits the accuracy of velocity and magnetic field diagnostics. Therefore, precise correction of the wavelength shift distribution is essential. Aims. This study presents a method for compensating for the field-dependent wavelength drift of a telecentric air-gapped FPI instrument. The method allows for accurate calibration using data directly recorded by the instrument and provides precise measurements of wavelength shifts under actual observing conditions. This results in a reliable wavelength correction, which serves as a prerequisite for high-precision scientific observations. Methods. The method scanned solar spectral lines directly through the scientific imaging path. Relative wavelength shifts across the FOV were then extracted using a cross-correlation algorithm combined with centroid localization. These shifts were decomposed into linear and nonlinear components. A response model linking actuator offset voltages to the linear drift slopes was constructed to actively compensate for the linear part, while the remaining nonlinear component is characterized as the intrinsic instrument bias. Results. The method was applied to the Visible-light Imaging Spectrometer (VIS) at the New Vacuum Solar Telescope (NVST) of Yunnan Observatories. The voltage-to-slope response model demonstrated excellent performance, with R-2 = 0.998 and root-mean-square error (RMSE) <= 0.007 V for both offset voltages, which enabled effective correction of the linear wavelength drift. After correction, the maximum wavelength shift decreased from 0.14 & Aring; to 0.05 & Aring;, significantly improving the homogeneity of the wavelength response and suppressing linear drift artifacts, thereby revealing previously obscured solar velocity signals. Moreover, a comparative analysis was conducted using the laser scanning technique, and showed excellent agreement with the results obtained from the proposed method. |
| 学科主题 | 物理学 ; 光学 ; 天文学 ; 天文学其他学科 ; 机械工程 ; 仪器仪表技术 ; 光学技术与仪器 ; 天文仪器 |
| URL标识 | 查看原文 |
| 出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
| WOS关键词 | RESOLUTION |
| 资助项目 | N/A |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001736287000001 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | [2024YFA1612000] ; [12573091] ; [12373115] ; [202305AS350029] ; [202305AT350005] ; [202205AG070009] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/29130]  |
| 专题 | 云南天文台_抚仙湖太阳观测站 |
| 通讯作者 | Ji KF(季凯帆) |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, PR China; 2.University of Chinese Academy of Sciences, Beijing 100049, PR China; 3.Yunnan Key Laboratory of Solar Physics and Space Science, Kunming 650216, PR China |
| 推荐引用方式 GB/T 7714 | Ma L,Ji KF,Jin ZY,et al. Field-dependent wavelength drift compensation in Fabry-Perot solar imaging spectrometers[J]. ASTRONOMY & ASTROPHYSICS,2026,708. |
| APA | 马琳,季凯帆,金振宇,常亮,&朱瑾.(2026).Field-dependent wavelength drift compensation in Fabry-Perot solar imaging spectrometers.ASTRONOMY & ASTROPHYSICS,708. |
| MLA | 马琳,et al."Field-dependent wavelength drift compensation in Fabry-Perot solar imaging spectrometers".ASTRONOMY & ASTROPHYSICS 708(2026). |
入库方式： OAI收割
来源：云南天文台
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