Feng Lei, Zhou Jinsong, Wei Lidong, He Xiaoying, Li Yacan, Jing Juanjuan, Xiangli Bin
Appl Opt. 2018 Nov 1;57(31):9512-9522. doi: 10.1364/AO.57.009512.
A double-channel prism imaging spectrometer that includes visible-near-infrared (VNIR) and shortwave-infrared (SWIR) spectra is presented. Double slits divide a wide spectral band into two independent channels for VNIR and SWIR, guaranteeing their independent spectral resolution. A beam splitter splits the band into two, one detected by the SWIR and the other by the VNIR detector. The freeform surface, as a mirror, compensates for astigmatism across a wide spectral band. An imaging spectrometer with 30° field of view and a measured spectrum from 400 nm to 2500 nm is designed. This compact, cost-effective spectrometer with high performance and small spectral distortion has a huge potential for broadband space exploration.
介绍了一种双通道棱镜成像光谱仪，它包括可见近红外（VNIR）和短波红外（SWIR）光谱。双狭缝将宽光谱带分为VNIR和SWIR两个独立通道，确保它们具有独立的光谱分辨率。一个分束器将该波段一分为二，一部分由SWIR探测器检测，另一部分由VNIR探测器检测。自由曲面作为反射镜，可在宽光谱带内补偿像散。设计了一种具有30°视场且测量光谱范围为400纳米至2500纳米的成像光谱仪。这种紧凑、经济高效且具有高性能和小光谱畸变的光谱仪在宽带太空探索方面具有巨大潜力。
