宽视场大相对孔径高光谱成像仪已成为航空海洋水色遥感等领域的应用需求。根据宽视场和大相对孔径的研究目标，采用离轴Schwarzschild望远成像系统和改进型Dyson光谱成像系统匹配的结构型式，设计了一个视场为40°、相对孔径为1/1.8、工作波段为0.35~1.05 μm的航空遥感高光谱成像仪光学系统。基于像差理论，分析了改进型Dyson光谱成像系统球差校正原理，运用光学设计软件Zemax对高光谱成像仪光学系统进行了光线追迹和优化，并对设计结果进行了分析。分析结果表明，设计的光学系统在各个波长的光学传递函数均不小于0.82，谱线弯曲和谱带弯曲均小于像元尺寸的5%。这便于光谱和辐射定标，完全满足设计指标要求，且系统体积小、重量轻，适合于航空遥感应用。

Airborne ocean colour remote sensing requires wide angle and large relative-aperture hyperspectral imager. Based on the research objective of wide angle and large relative-aperture, an airborne hyperspectral imager optical system is designed using an off-axis Schwarzschild telescope and a modified Dyson spectral imaging system. The field of view of hyperspectral image is 40°, relative-aperture is 1/1.8, and working waveband is 0.35~1.05 μm. Based on the aberration theory, the principle of spherical aberration correcting is analyzed in modified Dyson spectral imaging system. Ray tracing, optimization and analysis are performed by Zemax software. Results show that the modulation transfer functions for all wavelengths are bigger than 0.82; both smile and keystone are less than 5% of the pixel size. It is convinient for spectral and radiation calibration. The designed optical system satisfies the requirements of specifications, and it is small and light, suitable for airborne remote sensing.