介绍了猫眼动镜干涉光谱仪的基本原理和三种猫眼镜，分析了猫眼动镜的横向偏移对干涉图的影响，推导了横移所产生的最大附加光程差公式，从相位误差角度给出了猫眼动镜的横移误差容限公式并得到了在典型参量下的定量数据.分析了猫眼镜次镜倾斜对光程差的影响，导出了次镜倾斜所产生的最大附加光程差公式，并给出了在典型参量下最大附加光程差与次镜倾角之间的关系图.

The basic principle of the moving-cat′s-eye interference spectrometer and three kinds of cat′s-eye retroreflectors were introduced.The lateral shift tolerance of the moving cat′s-eye retroreflector was analyzed systematically by means of phase error,and its formula was derived.Some data for the typical parameters of the above interference spectrometer was given.The effect of the inclination of the secondary mirror of the cat′s-eye retroreflector on the optical path difference was analyzed.A graph of the relationship,for the typical parameters,between the maximum additional optical path difference and the tilt angle of the secondary mirror of the cat′s-eye retroreflector was given.