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本文从调制度和相位误差角度，系统分析了双光束干涉光谱仪中，当光束孔径为圆形和矩形时，动镜运动过程中发生倾斜的影响，讨论了动镜倾斜容限以及减小动镜倾斜误差的方法．
In this paper, from the perspective of modulation and phase error, we systematically analyzed the influence of tilting during the movement of the moving mirror when the beam aperture is circular and rectangular in the double-beam interferometer. The tilting tolerance of the moving mirror and the reduction of the moving mirror Tilt error method.