掩膜式光谱仪通过分光镜，将入射场景分为空间维和光谱维两路分别采集，然后对其进行信息融合，实现光谱高动态视频信号的获取，在动态高光谱成像领域具有广泛的应用价值。为了解决掩膜式光谱仪轻小型化问题，针对光谱光学系统部分，进行镜片数量的精简化设计，采用光栅替换传统棱镜，在实现线性色散的同时使结构进一步紧凑。并针对光栅无用级次产生的杂散光问题进行分析，论证了系统设计的可行性。最终设计的系统在400~1 000 nm范围内，光谱分辨率均小于4 nm，全视场奈奎斯特频率处平均调制传递函数（MTF）均大于0.4，像面照度均匀性高于0.9，实现良好像质；同时杂散光产生的信噪比为0.06，不影响光谱信息的采集。

The mask spectrometer uses the beam splitter to separate the incident scene into two dimensions: spatial dimension and spectral dimension, then information fusion is used to achieve high spectral resolution of dynamic video signal acquisition. It has wide application value in the field of dynamic hyperspectral imaging. In order to solve the problem of miniaturization of mask spectrometer, for the part of the spectral optical system simplified design of the number of lenses, and the conventional prism was replaced by the grating, the linear dispersion was realized while the structure was further compacted. The problem of stray light generated by the unwanted stages of the grating was analyzed, and the feasibility of the system design was demonstrated. Finally, in the range of 400-1 000 nm, the spectral resolution was less than 4 nm, the average modulation transfer function (MTF) at the full field of view Nyquist frequency was greater than 0.4, and the image illumination uniformity was higher than 0.9, achieved good image quality. Meanwhile, the SNR generated by stray light was 0.06, which did not affect the collection of spectral information.