Chinese Optics, Volume. 18, Issue 2, 368(2025)
Design of spaceborne full-spectrum hyperspectral system
Fig. 6. MTF diagram of each spectral band. (a) VNIR; (b) SWIR; (c) MWIR; (d) LWIR
Fig. 7. Splicing scheme of the spectrometer. (a) VNIR splicing; (b) SWIR splicing; (c) MWIR splicing; (d) LWIR splicing
Fig. 9. MTF diagram of each spectral band. (a) PAN; (b) VNIR; (c) SWIR; (d) MWIR; (e) LWIR
Fig. 10. Medium and long wave blackbody radiant exitance. (a) 3.0-5.0 μm; (b) 8.0-12.5 μm
Fig. 12. Schematic of low temperature structure of the spectrograph
Fig. 14. Effect of temperature inwall on background radiation. (a) Medium wave background radiation; (b) long wave background radiation
Table 1. Key technical specifications of the optical system
View tableView in ArticleTable 1. Key technical specifications of the optical system
类别 波段 /μm 像元 尺寸 /μm 焦距 /mm F数 空间 分辨率 /m 幅宽 /km 视场 角 /(°) 像元数 全色 0.4-0.8 7.5 3750 3.75 1 20000 可见 0.4-0.9 15.0 3750 3.75 2 10000 短波 0.9-2.5 15.0 3750 3.75 2 20 2.3 10000 中波 3.5-5.0 15.0 2500 2.50 3 6667 长波 8.0-12.5 30.0 2500 2.50 6 3334
Table 2. Structural parameters of Offner spectrometer in each spectral band
View tableView in ArticleTable 2. Structural parameters of Offner spectrometer in each spectral band
类别 可见 短波 中波 长波 光谱分辨率/nm 10 20 40 80 波段数 50 80 37 56 像元尺寸/μm 15 15 15 30 光谱色散/mm 0.75 1.20 0.56 1.68 探测器规模 2048×256 2048×256 2048×256 1024 ×256光谱仪数量 5 5 4 4 狭缝/mm 30×5 30×5 25×4 25×4 相对孔径 0.13 0.13 0.20 0.20
Table 3. Tolerance setting for spectrometer
View tableView in ArticleTable 3. Tolerance setting for spectrometer
类别 反射镜M1 光栅 反射镜M2 曲率半径/mm ±0.01 ±0.01 ±0.01 厚度/mm ±0.01 ±0.005 ±0.01 XY偏心/mm ±0.01 - ±0.01 XY倾斜/° ±0.005 - ±0.005 S+A不规则度/光圈 ±0.5 - ±0.5
Get Citation
Copy Citation Text
Yin WU, Yue-ming WANG, Dong ZHANG. Design of spaceborne full-spectrum hyperspectral system[J]. Chinese Optics, 2025, 18(2): 368
Category:
Received: Aug. 25, 2024
Accepted: Nov. 7, 2024
Published Online: May. 19, 2025
The Author Email:
