GREGOR Fabry-Pérot interferometer and its companion the blue imaging solar spectrometer
GREGOR Fabry-Pérot interferometer and its companion the blue imaging solar spectrometer
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GREGOR Fabry-Pérot 干涉仪及其伴侣蓝色成像太阳光谱仪
DOI：
10.1117/1.oe.52.8.081606
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发表时间：
2013
影响因子：
1.3
通讯作者：
R. Volkmer
中科院分区：
文献类型：
--
作者：
K. Puschmann;C. Denker;H. Balthasar;R. Louis;E. Popow;M. Woche;C. Beck;T. Seelemann;R. Volkmer
法布里-珀罗干涉仪（GFPI）是位于西班牙特内里费岛泰德天文台的德国1.5米格雷戈里太阳望远镜的三个第一个光仪器之一。GFPI允许快速窄带成像和事后图像恢复。所获得的物理参数将是理解太阳表面150 km空间尺度上动态太阳及其磁场的基本组成部分。GFPI是一种可调双标准具系统，采用准直安装。它是专为光谱和光谱偏振观测之间的530-860 nm和580-660 nm，分别，并具有理论光谱分辨率R 250;000。大尺寸、高节奏的电荷耦合器件探测器配备了先进的计算机硬件和软件，能够在相当于太阳特征演化时间的时间跨度内扫描光谱线。50”× 38”的视场（FOV）覆盖了光谱模式下有源区典型面积的很大一部分。在斯托克斯矢量分光偏振法的情况下，FOV减小到25”× 38”。介绍了GFPI的主要特点，包括先进的自动校准和观测程序。在仪器的光学设计的改进进行了讨论，并显示第一个观测结果。最后，第一个具体的想法，第二个FPI，蓝色成像太阳光谱仪的整合，将探索低于530 nm的蓝色光谱区域。© 2013年光学摄影学会
The GREGOR Fabry-Perot Interferometer (GFPI) is one of three first-light instruments of the German 1.5-m GREGOR solar telescope at the Observatorio del Teide, Tenerife, Spain. The GFPI allows fast narrow-band imaging and postfactum image restoration. The retrieved physical parameters will be a fundamental building block for understand- ing the dynamic sun and its magnetic field at spatial scales down to ∼50 km on the solar surface. The GFPI is a tunable dual-etalon system in a collimated mounting. It is designed for spectrometric and spectro- polarimetric observations between 530-860 nm and 580-660 nm, respec- tively, and possesses a theoretical spectral resolution of R ≈ 250;000. Large-format, high-cadence charged coupled device detectors with sophisticated computer hard- and software enable the scanning of spec- tral lines in time-spans equivalent to the evolution time of solar features. The field-of-view (FOV) of 50" × 38" covers a significant fraction of the typical area of active regions in the spectroscopic mode. In case of Stokes-vector spectropolarimetry, the FOV reduces to 25" × 38". The main characteristics of the GFPI including advanced and automated cal- ibration and observing procedures are presented. Improvements in the optical design of the instrument are discussed and first observational results are shown. Finally, the first concrete ideas for the integration of a second FPI, the blue imaging solar spectrometer, are laid out, which will explore the blue spectral region below 530 nm. © 2013 Society of Photo-Optical