以双镜系统为基础构建了Offner成像光谱仪，并利用光程函数来获得一种Offner成像光谱仪的初始结构.通过光学设计软件Code V对该初始结构进行了仿真与优化，优化后的光谱仪具有高成像质量，其均方根点列图直径明显降低，调制传递函数曲线在子午像与弧矢像上都获得了好的成像效果.该研究免去了过于复杂的像差推导过程，并在宽光谱400～1 300 nm条件下获得了具有高成像质量的Offner光谱仪结构，为光谱仪的搭建提供了理论基础.

The Offner imaging spectrometer was built on the basis of the double mirror system, and its initial structure was obtained through solving optical path function. Through simulating and optimizing the initial structure using professional optical design software (Code V), the high image quality of spectrometer was obtained. Its root mean square spot diameter decreased obviously, and modulation transfer function curves in meridianal and sagittial had good imaging results. The study can eliminate overly complex aberration derivation process, and obtain high image quality Offner spectrometer structure in a wide spectrum (400~1 300 nm). It can provide a theoretical basis for the construction of the spectrometer.