【摘要】 为了研制红外空间遥感用傅里叶变换光谱仪,将其作为风云三号、四号气象卫星的有效载荷,在比较国外各种航天工程项目中傅里叶变换光谱仪机械扫描方案的基础上,提出了一种新的机械扫描方案。它利用光通过平行平面镜组时光程随入射角度的改变而变化这一特性,同时把两支光路的光程改变量关联起来。该方案只使用平面反射镜,对于运动部件的精度要求比较低,对倾斜、磨损等不敏感。就国内的具体技术条件而言,这种方案是切实可行的。更多还原

【Abstract】 To make a space-borne Fourier transform infrared spectrometer as an effective load on the FY 3 and FY4 satellites, the mechanical scanning methods of the Fourier Transform Spectrometers in the space-borne projects are compared and discussed, then a new method is put forward. It is based on the principle that when light passes through two parallel plane mirrors the optical path length depends on the incident angle. The new method correlates the optical path length changes between the two arms of the interferometer. This method requires only plane mirrors, and it is immune to tilt, wearing etc. Therefore this method is suitable for our project.更多还原