Liu Zhang, Bonan Li, Yongnan Lu, Yangyang Zou, Tailei Wang. Optical system design of spaceborne CO2 imaging spectrometer based on Offner convex grating[J]. Infrared and Laser Engineering, 2022, 51(7): 20220431
- Infrared and Laser Engineering
- Vol. 51, Issue 7, 20220431 (2022)
Fig. 1. Schematic diagram of Offner grating spectrometer
Fig. 2. Meridian imaging
Fig. 3. Sagittal imaging
Fig. 4. Schematic of the design process
Fig. 5. Initial structure diagram
Fig. 6. Spot diagram of the initial structure with the wavelength of （a） 1.594 μm, （b） 1.6065 μm, （c） 1.619 μm; MTF of the initial structure with the wavelength of （d） 1.594 μm, （e） 1.6065 μm, （f） 1.619 μm
Fig. 7. (a) Structure of optimized optical system; (b) Structure of optical-mechanical
Fig. 8. Spot diagram of the optimized system with the wavelength of （a） 1.594 μm, （b） 1.606 5 μm, （c） 1.619 μm; MTF of the optimized system with the wavelength of （d） 1.594 μm, （e） 1.606 5 μm, （f） 1.619 μm
Fig. 9. Geometric encircled energy
Fig. 10. Optimize keystone image
Fig. 11. Optimize smile image
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Table 1. Principal design indicators of the system
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Table 2. Structure parameter of initial optical
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Table 3. Structure parameter of optimization system
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