从图像复分光谱成像系统的图谱输出理论模型出发, 对已有16波段系统进行改进, 研究了大相对孔径和结构紧凑型系统.模拟实现了16波段成像的整体设计与优化, 对棱镜分光易造成图谱图像区域混叠问题进行了分析.采用光谱成像系统匹配结构形式, 利用Zemax-EE的多重结构特性, 设计了视场为±1.25°, 相对孔径达到1∶3, 系统结构尺寸约为220 mm的图像复分光谱成像仪系统, 且各个波长光学传递函数值均大于0.75.与已有等同空间分辨率的16波段图像复分光谱成像系统比较, 所设计系统结构紧凑、衍射极限和通光能力明显改善、光谱质量大幅提高, 可满足小型化需求.该研究为新型快照式光谱成像技术的理论研究和图像复分光谱成像仪的光学系统设计提供了依据.

From the output atlas theoretical model of the image replicating imaging system, to improve the existing 16-band system and focused on the design of large relative-aperture and compact system, the design and optimization of 16-band spectral imaging system were performed with Zemax-EE software. This work focused on the analysis of the problem of the image aliasing resulted from the birefringence of the prisms. By matching the spectral imaging system and using the Zemax muti-configuration, the imaging quality of the system was simulated. The viewing field angle is ±1.25°, the relative-aperture is 1∶3 and the size of the system is about 220 mm (z). The modulation transfer function of every viewing field of every wavelength is more than 0.75 under the Complementary Metal Oxide Semiconductors (CMOS) Nyquist frequency situation. Compared with the existing equivalent spatial resolution of 16-band image replicating imaging spectrometer, this design is more compact which meets the requirement of miniaturization. The diffraction limit and light quantity are improved, so the imaging quality is significantly improved. The research provides a new design basis for the theoretical study of new type of snapshot imaging technology and for the design of the image replicating imaging spectrometer.