针对Czerny-Turner结构光谱仪宽波段像散很难同时校正的不足，提出了一种复合方法校正像散，即在一阶消像散方法校正宽波段像散的能力达到极限时，加入柱镜，利用柱镜的相反像散变化趋势，进一步补偿光学系统的剩余像散，推导出复合方法的边缘波段像散补偿公式。应用复合方法，设计了1个近红外900~1700 nm的消像散Czerny-Turner结构。Zemax的仿真结果表明，全波段全视场均方根（RMS）值均小于14 μm，调制传递函数(MTF)达到0.7以上，全波段的光谱分辨率为1.5 nm。保证了在高光谱分辨率的情况下，实现了近红外800 nm宽波段像散的同时校正，避免了能量的横向扩散。该设计方法同样适用其他波段的结构设计，对宽波段消像散型光学系统的设计具有指导意义。

A composite method is proposed to correct the astigmatism, which aims at the problem that the astigmatism of the wide band of the Czerny-Turner structure spectrometer is hard to correct at the same time. With the new approach, when the ability of the first-order astigmatism correction reaches the limitation on wide broadband wavelength, the astigmatism opposite trend of added cylindrical lens is used to further compensate the residual astigmatism in the optical system. The astigmatism compensation formula on marginal waveband of with composite method is deduced. With the composite method, an anastigmatic Czerny-Turner structure on near-infrared waveband ranging from 900 nm to 1700 nm is designed. The simulation results of Zemax show that the root-mean-square (RMS) value of full-band and full fields of view is less than 14 μm, modulation transmission function (MTF) is higher than 0.7, and the spectral resolution is 1.5 nm at all wavelengths. The composite method achieves simultaneous correction of astigmatism at near-infrared 800 nm wide waveband, which can avoid energy transverse spread. The method can be applied in structure design at other wavelengths, and it is meaningful for designing broadband anastigmatic optical systems.