中文摘要：

采用光路展开法，利用调制度与相位误差两种判据，分析平行转镜在转动过程中的晃动、平行转镜的平行度、定镜的倾斜误差以及视场角等因素对平行转镜式光谱仪误差容限的影响．分析表明：平行转镜的晃动是平行转镜式光谱仪最重要的影响因素，但由于平行转镜的连续快速转动，惯性的作用会显著降低转动过程中的晃动影响；系统对平行转镜的平行度不敏感，对定镜的倾斜与视场角的误差容限与传统迈克尔逊式光谱仪相同．相对于传统直线往复运动式的光谱仪，平行转镜式光谱仪具有更高的探测速度与稳定性．同时，误差容限分析也为该光谱仪的系统设计与装调提供了理论指导．

英文摘要：

The tolerance of a rotating parallel-mirror-pair spectrometer （RPMPS） and some otherconsiderations are analyzedusing the modulation depth and the phase error criterion. These include thevibration of the parallel-mirror-pair （PMP）, the alignment error of the fixed end mirrors, the parallelismof the two rotating mirrors, and the field of view. The theoretical results show that the vibration of thePMP is the most sensitive factor to RPMPS. However, as an ultra rapid continuous rotational system,the rotation inertia will reduce the effect of the vibration dramatically. The RPMPS is less sensitive to theparallelism of the two rotating mirrors. The tolerance for the alignment error of the fixed end mirrors andthe field of view are similar to the traditional Michelson interferometer. Compared to the traditional linearmotion form spectrometer, the RPMPS is an ultra rapid scanning Fourier-transform spectrometer withstability advantages. These analyses will also give a theoretic guidance for system design and manufactureof RPMPS.