窄带可调谐滤光器在太阳磁场测量中的应用  

Application of the tunable narrowband filter in measurements of solar magnetic fields

作　　者：王远方舟 金振宇[1,3] 王希群 戴懿纯 Yuanfangzhou Wang;Zhenyu Jin;Xiqun Wang;Yichun Dai(Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China;Yunnan Key Laboratory of Solar Physics and Space Science,Kunming 650216,China;School of Physics&Electronic Information,Yunnan Normal University,Kunming 650500,China;Yunnan Key Laboratory of Opto-electronic Information Technology,Kunming 650500,China)

机构地区：[1]中国科学院云南天文台,昆明650216 [2]中国科学院大学,天文与空间科学学院,北京100049 [3]云南省太阳物理与空间目标监测重点实验室,昆明650216 [4]云南师范大学,物理与电子信息学院,昆明650500 [5]云南省光电信息技术重点实验室,昆明650500

出　　处：《科学通报》2023年第15期1927-1940,共14页Chinese Science Bulletin

基　　金：国家自然科学基金(11833010);云南省科技计划(202003AD150019,202105AB160001)资助。

摘　　要：磁场测量是太阳科学观测中最重要的一部分,围绕磁场展开的相关研究是太阳物理的研究热点.磁像仪是一种可以进行高分辨磁场观测的精密测量器件,在地基和空间太阳观测中得到了广泛的应用.窄带可调谐滤光器是磁像仪获得窄带光的核心光学部件,其特性会对磁像仪的性能产生影响.滤光器分为两大类,具体可包括4种结构,不同结构具有不同的性能特征,可根据磁像仪的需求进行选择.本文调研了国内外著名地基、球载、空间太阳磁场望远镜,总结了太阳磁像仪中常用的各种窄带可调谐滤光系统的实现方式,滤光器的结构、原理、轮廓特性以及在磁像仪中的应用场景,归纳了不同太阳磁像仪滤光系统的设计特点和关键技术,以期为未来太阳磁像仪滤光系统的研制提供参考.Solar magnetic field observations achieve a precise understanding of the solar activity.Imaging spectropolarimetry obtains the magnetic field strength for the entire field of view simultaneously and spectral samples sequentially.By employing highresolution reconstruction methods,ground-based solar imaging spectropolarimeters are suitable for magnetic field measurements with a high spatial and temporal resolution.The space-borne solar imaging spectropolarimeter has a compact optical path,stable performance,and convenient data processing.Furthermore,it can be used for deep space exploration.Narrowband tunable filters are the primary spectroscopic components of imaging spectropolarimeters for obtaining narrowband light,with various structural forms for different application scenarios from ground to space.Tunable narrowband filters are classified into two categories according to different principles:The Fabry-Perot filter(F-P filter)and the polarization interference filter.The Fabry-Perot filter is divided into two types based on wavelength adjustment methods:Air cavity and lithium niobate.Polarization interference filters are divided into Lyot filters and solid Michelson interferometers according to different beam-splitting structures.Magnetic field measurement using solar imaging spectropolarimetry is a high-precision measurement with strong noise and weak signal.The performance of the narrowband tunable filter determines the accuracy of the spectral transmittance curve,and the filter instability will increase the noise and affect the accuracy of the magnetic field intensity.The narrowband tunable filter,as the most complex component in the optical path of imaging spectropolarimeters,must solve different technical problems in various application scenarios,and the key technology directly affects whether the magnetic image can be obtained.Therefore,how to design the filter system based on different application scenarios is a problem that must be solved for imaging spectropolarimetry to achieve high-precision observat

关 键 词：磁像仪 法珀滤光器 偏振干涉滤光器 太阳望远镜 太阳磁场测量 

分 类 号：P182.2[天文地球—天文学]