用于太阳磁场精确测量的中红外观测系统(AIMS)坐落于青海省海西州茫崖市冷湖天文观测基地D平台。AIMS通过其搭
载的红外傅里叶变换光谱仪获取太阳12.32 μm附近的Mg I光谱，成功实现对太阳磁场的直接测量。这台红外傅里叶变换光谱仪具备0.004 cm-1的光谱分辨率和128像元的探测视场，攻克了超大光程差干涉仪技术和红外低温成像技术等关键难题，并研制出高性能的128像元红外探测器。此外，该仪器还在海拔4 000 m高度完成与望远镜的光轴精密配准，是国际上首台专用于太阳磁场测量的多像元超高光谱分辨率成像型红外傅里叶变换光谱仪。本文简要概述这台红外傅里叶变换光谱仪的工作原理、系统组成、技术特色和科学应用。

The study named Accurate Infrared Magnetic Field Measurements of the Sun (AIMS) is placed in platform D of the
Lenghu astronomical observation base in Mangya City, Haixi Prefecture, Qinghai province. By utilising the infrared Fourier transform spectrometer to obtain the Mg I spectrum of the Sun near 12.32 μm, AIMS has successfully achieved the direct measurement of the solar magnetic field. This infrared Fourier transform spectrometer features a spectral resolution of 0.004 cm-1 and a 128-element detection field of view. It has overcome key technical challenges, including the ultra-large optical path difference interferometer technology and infrared cryogenic imaging technology, and a 128-element high-performance infrared detector has been developed. Precise optical axis alignment with the telescope has been accomplished at an altitude of 4 000 m. This instrument is the world’s
first multi-pixel imaging infrared Fourier transform spectrometer with ultra-high spectral resolution dedicated to solar magnetic field measurement. This paper provides a brief introduction to the working principle, system composition, technical characteristics and scientific applications of this infrared Fourier transform spectrometer.